Task 54
Task 54
SHC Task 54

Price Reduction of Solar Thermal Systems

Publications

Search:
| Advanced Search | Clear
Order by:

The following are publications developed under Task 54:

Webinars

IEA SHC Webinar: Cost reduction potential above 30 % - Full Video
March 2018 - Posted: 2018-07-09
By: S. Fischer, M. Köhl, Y. Louvet, M. Meir, A. Oliva, S. Saile, B. Schiebler, F. Veynandt

Having the image of being too expensive to buy, too complex to install, too costly to maintain, solar thermal often loses the race against other offerings in today’s heating sector. How this trend can be reversed is one of the key questions of the SHC’s Task 54 “Price reduction of solar thermal systems”. This webinar will give information on the solar thermal value chain and highlight parts with the highest cost reduction potential.

General Task Publications

IEA SHC Webinar: Cost reduction potential above 30 %
April 2018 - Posted: 2018-04-09
By: Riccardo Battisti
Publisher: Solarthermalworld.org

The key takeaway from an IEA SHC Solar Academy webinar held on 14 March 2018: There is still much room for cost cuts along the entire solar thermal value chain. The webinar was organised jointly by the IEA Solar Heating & Cooling Programme’s Task 54 and the International Solar Energy Society. The online seminar, titled Price Reduction of Solar Thermal Systems, was moderated by Sandrin Saile, Project Manager at Fraunhofer ISE, based in Germany. Its aim was to present the various ways in which the cost of solar thermal plants could be lowered to stop the bleeding on the market and give the technology a competitive edge over other thermal energy sources, such as biomass and heat pumps.

IEA SHC Task 54: Solar Thermal Cost Reductions
November 2017 - Posted: 2017-11-29
By: Eva Augsten
Publisher: Solarthermalworld.org

The objective of IEA SHC Task 54 is to reduce the purchase price of solar thermal systems by up to 40 % across the entire value chain. To achieve this, the project partners have been evaluating technical and non-technical cost-saving potential, with low-cost materials, such as polymers, and production technologies bound to play an important role. At an early October workshop in Linz, Austria, about 50 project partners and guests discussed cost reductions made possible by new distribution channels, digital solutions and systems thinking approaches.

Industry and Research Join Forces on Reliability Testing of Collectors and Materials
Industry and Research Join Forces on Reliability Testing of Collectors and Materials
December 2016 - PDF 0.13MB - Posted: 2016-12-08
Editor: Pamela Murphy
Publisher: IEA SHC

Solar thermal collectors and their components are commonly exposed to a wide range of climatic influences. Next to UV radiation, factors like humidity, wind, extremely high or low temperatures, salt, sand and other particles in the atmosphere affect the surfaces and performance of these products. Although these influences are decisive factors for the lifetime and long-term efficiency of solar thermal collectors, there are no validated or binding test procedures for reliability assessment over time or models that allow a location-specific service life prediction.

Task 54: Price Reduction of Solar Thermal Systems
Task 54: Price Reduction of Solar Thermal Systems
November 2015 - PDF 0.11MB - Posted: 2015-11-17
By: Michael Köhl, ISE Fraunhofer
Publisher: IEA SHC

Driving down the costs of solar thermal systems is not just about cheaper collector production. In fact, post-production processes, such as sales, installation and maintenance account for up to 50% of the price that end consumers pay. This new IEA SHC Task, Price Reduction of Solar Thermal Systems, will investigate these other factors and find ways to reduce systems costs. The Task’s kick-off meeting was hosted by Fraunhofer ISE in Freiburg, Germany the end of October. Researchers and industry representatives from all over the world participated.

IEA SHC Task 54 Investigating Cost Factors Along the Value Chain - Posted: 2017-07-14
By: Baerbel Epp
Publisher: Solarthermalworld.org

Researchers have worked intensively for one-and-a-half years across national borders to find ways of reducing the costs of solar thermal systems and making them more attractive to end users. The members of Task 54 of the IEA Solar Heating and Cooling Programme, Price Reduction of Solar Thermal Systems, have discussed the effects of standardised product designs or changes in product offerings on cost structures. They have also analysed the entire value chain from component manufacture to system assembly and installation to help identify cost-cutting potential. This is the first time that methods of Process Cost Analysis are being adapted for the solar thermal business.

Other

Info Sheets

INFO Sheet B03: Reduction of Maintenance Costs by Preventing Overheating - <b>NEW</b>
INFO Sheet B03: Reduction of Maintenance Costs by Preventing Overheating - NEW
October 2018 - PDF 0.43MB - Posted: 2018-10-29
By: Bert Schiebler (ISFH Hameln), Federico Giovannetti (ISFH Hameln), Stephan Fischer (IGTE Stuttgart)

After sale costs of solar thermal systems represent a significant part of the overall costs of the delivered solar heat. In practice, high stagnation loads have a strong impact on the maintenance efforts, which impair the cost-efficiency and generally the attractiveness of solar thermal installations. To prevent high temperature loads in solar circuits, different approaches are usually pursued. Most of them are based on additional cooling systems or collector draining strategies (drain back), which require more complex hydraulic installations and control technologies respectively.

INFO Sheet B05: Levelized Cost of Heat for Solar Thermal Systems with Overheating Prevention - <b>NEW</b>
INFO Sheet B05: Levelized Cost of Heat for Solar Thermal Systems with Overheating Prevention - NEW
October 2018 - PDF 0.49MB - Posted: 2018-10-29
By: Bert Schiebler (ISFH Hameln), Federico Giovannetti (ISFH Hameln), Stephan Fischer (IGTE Stuttgart)

Solar thermal systems are state-of-the-art devices to cover part of the heat demand for the domestic hot water supply and space heating of buildings. Depending on the system design and the heat demand more or less intensive stagnation periods can occur. Usually high stagnation loads require a complex hydraulic system design, affect the operational safety and lead to high maintenance efforts, which impair the cost-efficiency and the general attractiveness of solar thermal installations.

INFO Sheet D01: Review of Installation Costs <b>- NEW</b>
INFO Sheet D01: Review of Installation Costs - NEW
September 2018 - PDF 0.16MB - Posted: 2018-09-11
By: Daniel Mugnier (TECSOL), Sandrin Saile (Fraunhofer ISE), Daniel Philippen (SPF)

Task 54 has permitted to investigate installation costs among installers by distributing questionnaires in Austria, Switzerland, France, Romania, Denmark, the Netherlands and Germany. Besides, complementary data have been provided by German Authorities to deepen this database. From this work, several indicative lessons can be presented in terms of costs.

INFO Sheet D02: Obstacles in Installation and Recommendations <b>- NEW</b>
INFO Sheet D02: Obstacles in Installation and Recommendations - NEW
September 2018 - PDF 0.18MB - Posted: 2018-09-11
By: S. Saile, Fraunhofer ISE, D. Mugnier, TECSOL, D. Philippen, SPF

Task 54 investigated obstacles in installation of solar-thermal systems and developed recommendations for improvement of the installation process by evaluating respective questionnaires from installation companies in Austria, Switzerland, France, Romania, Denmark, the Netherlands and Germany. From feedback by 23 installers from 7 countries, recommendations and wishes for working with solar thermal systems can be deduced. This info sheet provides insight on soft factors that influence the day-to-day business of solar thermal installation and highlights recommendations for a positive transformation of future installation routines. The info sheet is a direct follow-up to info sheets D 1 “Overview of Installation Costs” (http://task54.iea-shc.org/info-sheets).

INFO Sheet B02: Effects of Technological Measures on Costs <b>- NEW</b>
INFO Sheet B02: Effects of Technological Measures on Costs - NEW
May 2018 - PDF 0.39MB - Posted: 2018-05-28
By: Daniel Philippen, Marco Caflish, Michel Haller, Stefan Brunold (SPF, CH)
The potential to reduce market prices of turn-key domestic solar thermal systems in Switzerland was recently analysed within a study financed by the Swiss Federal Office of Energy. The study focussed on the cost effect of new technological approaches regarding single components and the whole heating system. Based on a market survey for single and multi-family buildings, the cost structure of actual offers for solar thermal systems in existing buildings in Switzerland was analysed. Relevant cost drivers were identified, strategies for implementing new and cheaper technologies were proposed, and their possible effect on the market prices was quantified.
INFO Sheet D04: End-Users Decision Making Factors for H&C Systems <b>- NEW</b>
INFO Sheet D04: End-Users Decision Making Factors for H&C Systems - NEW
April 2018 - PDF 0.36MB - Posted: 2018-05-28
By: Stefano Lambertucci (Solar Heat Europe)

The EU-funded FROnT project (Fair Renewable Heating Options and Trade) aimed at promoting a level playing field for Renewable Heating and Cooling (RHC) in Europe, and at developing strategies for its greater deployment. It improved transparency about costs of heating and cooling options (using RHC or fossil fuels), RHC support schemes and end-user key decision factors. This knowledge has helped towards developing Strategic Policy Priorities for RHC to be used by public authorities in designing and implementing better support mechanisms. It also supported the industry in engaging more effectively their prospective clients. The project was run by eleven organisations from across the continent and was active from 01/04/14 until 31/12/16. It was funded by the European Commission’s IEE programme.

INFO Sheet A14: Heat Changers
INFO Sheet A14: Heat Changers
January 2018 - PDF 0.91MB - Posted: 2018-08-01
By: Marisol Oropeza, Stefan Abrecht

Reviving solar thermal is not only a matter of cost reduction but also one of visibility. New marketing strategies and ways to inform about the technology are crucial elements for strengthening the market for solar water heating. This info sheet presents the recently launched Heat Changers campaign as showcase project for innovative communication and promotion activities.

INFO Sheet A01: LCOH for Solar Thermal Applications - Guideline for levelized cost of heat (LCOH) calculations for solar thermal applications <b>- NEW</b>
INFO Sheet A01: LCOH for Solar Thermal Applications - Guideline for levelized cost of heat (LCOH) calculations for solar thermal applications - NEW
December 2017 - PDF 0.5MB - Posted: 2017-12-04
By: Yoann Louvet, University of Kassel; Stephan Fischer, ITW Stuttgart; Simon Furbo, Technical University of Denmark; Federico Giovanetti, ISFH; Franz Mauthner, AEE Intec; Daniel Mugnier, Tecsol; Daniel Philippen, SPF

In the framework of the IEA-SHC Task 54 appeared the need of assessing the costs of the heat produced by solar thermal systems over their life time in order to compare different designs and technological solutions with one another. The levelized cost of heat (LCOH), a measure based on the concept of levelized cost of energy, widespread in the electrical power sector, was chosen. This info sheet builds on the work of the FRoNT project [1] who laid the foundations for the application of the method to any heating technology. It aims at detailing the methodology to calculate the levelized cost of the heat substituted by solar thermal energy. Furthermore, an extension of the concept is suggested in order to estimate the cost of the heat generated by the entire solar assisted heating system, or the conventional sources of heat supply.

INFO Sheet A02: Reference System, Austria Conventional heating system for single-family house
INFO Sheet A02: Reference System, Austria Conventional heating system for single-family house
November 2017 - PDF 0.49MB - Posted: 2017-12-04
By: Thomas Ramschak, François Veynandt

This document describes the reference conventional system for domestic hot water preparation and space heating in a single-­family house in Austria. The system is modelled with TSol to calculate the fuel consumption and electric energy needed to provide the required domestic hot water and space heating. Using this result the levelized costs of heat (LCOH) for the reference conventional system in Austria is calculated using Equation 1, with the reference costs for the investment of the system (including installation costs), fuel and electricity costs.

INFO Sheet A03: Reference System, Austria Conventional heating system for multi-family house
INFO Sheet A03: Reference System, Austria Conventional heating system for multi-family house
November 2017 - PDF 0.5MB - Posted: 2017-12-04
By: mas Ramschak, François Veynandt

This document describes the reference conventional system for domestic hot water preparation and space heating in a multi-­-family house in Austria. The system is modelled with TSol to calculate the fuel consumption and electric energy needed to provide the required domestic hot water and space heating. Using this result the levelized costs of heat (LCOH) for the reference conventional system in Austria is calculated using Equation 1, with the reference costs for the investment of the system (including installation costs), fuel and electricity costs.

INFO Sheet A04: Reference System, Austria Solar domestic hot water system for single-family house
INFO Sheet A04: Reference System, Austria Solar domestic hot water system for single-family house
November 2017 - PDF 0.55MB - Posted: 2017-12-04
By: Thomas Ramschak, François Veynandt

This document describes the reference solar domestic hot water (SDHW) system for domestic hot water preparation in a single-family house in Austria. The system is modelled with TSol to calculate the fuel consumption and electric energy, as well as the substituted fuel provided by the SDHW system, which are needed to provide the required domestic hot water and space heating. Using this result the levelized costs of heat (LCOH) for the substituted fuel is calculated using equation 1, with the reference costs for the investment of the system, installation costs, fuel and electricity costs.

INFO Sheet A05: Reference System, Austria Solar Combisystem for single-family house
INFO Sheet A05: Reference System, Austria Solar Combisystem for single-family house
November 2017 - PDF 0.54MB - Posted: 2017-12-04
By: Thomas Ramschak, François Veynandt

This document describes the reference solar combined (combi) system for domestic hot water preparation and space heating in Austria. The system is modelled with TSol to calculate the fuel consumption and electric energy, as well as the substituted fuel provided by the combisystem, which are needed to provide the required domestic hot water and space heating. Using this result the levelized costs of heat (LCOH) for the substituted fuel is calculated using Equation 1, with the reference costs for the investment of the system, installation costs, fuel and electricity costs.

INFO Sheet A06: Reference System, Austria Solar domestic hot water system for multi-family house
INFO Sheet A06: Reference System, Austria Solar domestic hot water system for multi-family house
November 2017 - PDF 0.54MB - Posted: 2017-12-04
By: Thomas Ramschak, François Veynandt

This document describes the reference solar domestic hot water (SDHW) system for domestic hot water preparation in a multi-­-family house (MFH) in Austria. The system is modelled with TSol to calculate the fuel consumption and electric energy, as well as the substituted fuel provided by the SDHW system, which are needed to provide the required domestic hot water and space heating. Using this result the levelized costs of heat (LCOH) for the substituted fuel is calculated using Equation 1, with the reference costs for the investment of the system, installation costs, fuel and electricity costs.

INFO Sheet A07: Reference System, Germany Conventional heating system for single-family house - <b>NEW</b>
INFO Sheet A07: Reference System, Germany Conventional heating system for single-family house - NEW
November 2017 - PDF 0.55MB - Posted: 2017-12-04
By: Stephan Bachmann, Stephan Fischer, Bernd Hafner

This document describes the conventional reference system for domestic hot water preparation and space heating in single-­-family houses in Germany. The system is modelled with TRNSYS to calculate the fuel consumption and electric energy needed to provide the required domestic hot water and space heating. Using this result the levelized costs of heating (LCOH) for the conventional reference system for Germany is calculated using Eq. 1 and the reference costs for the investment of the system, installation costs, fuel and electricity costs.

INFO Sheet A08: Reference System, Germany Solar domestic hot water system for single family house - <b>NEW</b>
INFO Sheet A08: Reference System, Germany Solar domestic hot water system for single family house - NEW
November 2017 - PDF 0.59MB - Posted: 2017-12-04
By: Stephan Bachmann, Stephan Fischer, Bernd Hafner

This document describes the reference solar domestic hot water (SDHW) system in Germany. The system is modelled with TRNSYS to calculate the fuel consumption and electric energy needed to provide the required domestic hot water as well as the substituted fuel provided by the SDHW system. Using this result the levelized costs of heating (LCOH) for the substituted fuel is calculated using Eq. 1 and the reference costs for the investment of the system, installation costs, fuel and electricity costs.

INFO Sheet A09: Reference System, Germany Solar Combisystem for single-family house - <b>NEW</b>
INFO Sheet A09: Reference System, Germany Solar Combisystem for single-family house - NEW
November 2017 - PDF 0.59MB - Posted: 2017-12-04
By: Stephan Bachmann, Stephan Fischer, Bernd Hafner

This document describes the reference solar combisystem for domestic hot water preparation and space heating in single-­family houses in Germany. The system is modelled with TRNSYS to calculate the fuel consumption and electric energy needed to provide the required domestic hot water and space heating as well as the substituted fuel provided by the combisystem. Using this result the levelized costs of heating (LCOH) for the substituted fuel is calculated using Eq. 1 and the reference costs for the investment of the system, installation costs, fuel and electricity costs.

INFO Sheet A11: Reference System, Switzerland Solar domestic hot water system for multi-family house
INFO Sheet A11: Reference System, Switzerland Solar domestic hot water system for multi-family house
November 2017 - PDF 0.48MB - Posted: 2017-12-04
By: Daniel Philippen, Marco Caflisch

This document describes a Swiss reference solar domestic hot water (SDHW) system for multi-­-family houses that uses a gas burner as auxiliary. The system is modelled in the simulation software Polysun [1] with template No. 8a that was adapted for a larger heat demand of a multi-­-family house. The reference system is taken from [2]. The costs for investment and maintenance of the gas burner (the device) are allocated to the room heating and are not taken into account here. However, the costs of gas for preparing DHW are included into the calculation.

INFO Sheet A12: Reference System, Denmark Solar domestic hot water system for single-family house
INFO Sheet A12: Reference System, Denmark Solar domestic hot water system for single-family house
November 2017 - PDF 0.44MB - Posted: 2017-12-04
By: Simon Furbo, Janne Dragsted

This info sheet gives information on a reference solar domestic hot water system for Denmark.

INFO Sheet C03: One-World-Solar-System
INFO Sheet C03: One-World-Solar-System
November 2017 - PDF 0.63MB - Posted: 2017-12-04
By: Max Wesle, Robert Buchinger

Sunlumo Technology is researching and developing future-oriented products and solutions in the field of solar heating. Mission and creed is to make a One-World-Solar-System available; to provide solar heating for literally everyone on earth. To realise this vision, Sunlumo developed a novel solar collector and the associated system components like pump group and piping to be mass-produced fully automatically.

INFO Sheet A13: LCoH calculation method: comparison between Task 54 and Solar Heat WorldWide
INFO Sheet A13: LCoH calculation method: comparison between Task 54 and Solar Heat WorldWide
November 2017 - PDF 0.66MB - Posted: 2018-02-15
By: François Veynandt, Thomas Ramschak, Yoann Louvet, Michael Köhl, Stephan Fischer

Comparison of the levelized cost of heat calculation methods for solar thermal applications in IEA-SHC Task 54 (LCoHs) and in Solar Heat Worldwide (LCoH)

INFO Sheet B01: Optimized Systems, Denmark - SDHW System with Heat Storage and Polymer Inlet Stratifier <b>- NEW</b>
INFO Sheet B01: Optimized Systems, Denmark - SDHW System with Heat Storage and Polymer Inlet Stratifier - NEW
November 2017 - PDF 0.46MB - Posted: 2018-05-28
By: Simon Furbo, Janne Dragsted (Technical University of Denmark)

This info sheet gives information on an optimized solar domestic hot water system with heat storage with polymer inlet stratifier in Denmark.

INFO Sheet C01: Cost Drivers and Saving Potentials (1): Material substitution
INFO Sheet C01: Cost Drivers and Saving Potentials (1): Material substitution
October 2016 - PDF 0.47MB - Posted: 2017-12-04
By: Karl Schnetzinger, Advanced Polymer Compounds (APC), Austria / Gernot M. Wallner, University of Linz (JKU), Austria

Due to the specific characteristics of polymeric materials (e.g., variety of property profiles, ease of processing, mass production capability, freedom of design) this material class has been used to replace metal parts and components in various industrial sectors. In this case study the cost reduction achieved by material substitution is described and discussed exemplarily for industrial pumps.

INFO Sheet C02: Cost Drivers and Saving Potentials (2): Production, installation, design
INFO Sheet C02: Cost Drivers and Saving Potentials (2): Production, installation, design
September 2016 - PDF 0.51MB - Posted: 2017-12-04
By: Alexander Thür, University of Innsbruck (UIBK-EEB), Austria

A main challenge of the solar thermal market is the reduction of the production and installation cost finally following by the reduction of the market price of solar thermal systems. Installation costs are a major share of the total costs for solar thermal systems. Good ideas for cost reduction are needed. This sheet will give input for the discussion of this topic.

Newsletters

IEA SHC Task 54 Newsletter 2018
October 2018 - Posted: 2018-10-01
By: Task 54

Contents:
- Final Task Meeting
- ISEC Conference
- Task 54 Webinar
- New Working Group
- LCoH Calcualtion Tool
- Levelized Cost of Heat for Reference Systems
- Improved Flat Plate Collector with Heat Pipes for Overheating Prevention
- Cost Optimized: Conico Glycol-Free Solar  System in First Residential Demonstration
- Installers Point the Direction
- How the Heat Changers Breathe New Life into Solar Thermal Marketing
- Upcoming Events
- Upcoming Publications

IEA SHC Task 54 Newsletter 2017
November 2017 - Posted: 2018-10-01
By: Task 54

In This Newsletter
- Past experts meetings in Rapperswil and Linz
- Task 54 workshop and industry round table in Linz, Austria
- Towards new system solutions with solar thermal – Insights by Roger Hackstock
- LCOH calculations of a selected reference system & sensitivity analysis
- First proposals for standardisation (collector / storage
- Price reduction potential Switzerland
- Progress in the development of heat pipe collectors for overheating prevention
- Solar domestic hot water system with polymer inlet stratifier

IEA SHC Task 54 Newsletter 2016
November 2016 - Posted: 2018-10-01
By: Task 54
In this newsletter
- Levelized costs of solar thermal heat
- Data Collection on installation
- New business model "Payouse"
- Techno-economical optimization "TEWIsol"
- Novel heat pipe collectors
- Drain-back system concept for large systems
- Solar thermal systems without differential controllers / sensors

Articles

Direct solar thermal systems with thermosiphon frost protection and innovative control strategies using a Thermo-Differential Bypass Valve
Direct solar thermal systems with thermosiphon frost protection and innovative control strategies using a Thermo-Differential Bypass Valve
June 2018 - PDF 0.21MB - Posted: 2018-06-25
By: Nico van Ruth
Publisher: EuroSun2018

This research involves a direct solar (combi-)system for use in cool climates, based on vacuum-tube collectors, that uses night-circulation for frost protection, which doesn’t rely on pumped circulation, but also provides frost protection through thermosiphon circulation as a back-up in case of power/control failures. Furthermore, this direct solar system does not use a collector sensor or storage tank sensor, but instead has both the temperature sensors integrated into the pumping station. These features are achieved by using a Thermo-Differential Bypass Valve, which is installed on the storage tank at the solar inlet, and which only opens when the solar supply temperature is higher than the storage tank temperature and bypasses the storage tank when the supply temperature is lower than the storage tank temperature. The solar circuit can thus be free of check valves, so it is free to thermosiphon when the pump is off, and the collector circuit can be regularly circulated to measure the collector temperature at the pumping station, without sacrificing system efficiency.

Polymer Collectors with Temperature Control - Potentials for System integration
Polymer Collectors with Temperature Control - Potentials for System integration
October 2016 - PDF 2.05MB - Posted: 2016-10-03
By: Alexander Thür, Katarina Maslikova
Publisher: Gleisdorf SOLAR 2016

Within the Austrian research project SolPol-4/5 it is the goal to find solutions for solar thermal systems based on cheap polymer materials but with low temperature limits in order to realize significant cost reduction potentials. Therefore one major point is to keep the temperature of the solar collector (and the complete system) below the material limits which means below 100°C for cheap polymer materials. For this, several possibilities are under investigation in many research projects. One solution is to design the collector in such a way, that the performance does not allow stagnation temperatures above 100°C (temperature limited collector – TLC). Other solutions try to keep the collector performance highest possible during operation and reduce the performance during stagnation by different technical solutions (overheat controlled – OHC) like reduction of absorption characteristic at high temperatures (Föste, 2015), reduction of transmission of the transparent cover or increasing the heat losses by activating cooling processes like internal ventilation of the collector (Harrison, 2004) or using a thermosyphon driven backcooler (Thür, 2014). This simulation study based on different parameter variations estimates how different operating conditions can influence design parameters for a solar domestic hot water system (SDHW) with different collector types. For different possible market conditions, which can potentially be situated world-wide, the goal of these investigations is to find out dependencies of different design parameters depending on specific operating conditions for solar domestic hot water systems (SDHW).

Replacing traditional materials with polymeric materials in solar thermosiphon systems - Case study on pros and cons based on a total cost accounting approach
Replacing traditional materials with polymeric materials in solar thermosiphon systems - Case study on pros and cons based on a total cost accounting approach
February 2016 - PDF 1.52MB - Posted: 2018-07-04
By: Bo Carlsson, Michaela Meir, John Rekstad, Dieter Preiss, Thomas Ramschak
Publisher: Solar Energy, Elsevier

The pros and cons of replacing traditional materials with polymeric materials in solar thermosiphon systems were analysed by adopting a total cost accounting approach. In terms of climatic and environmental performance, polymeric materials reveal better key figures than traditional ones like metals. In terms of present value total cost of energy, taking into account functional capability, end user investment cost, O&M cost, reliability and climatic cost, the results suggest that this may also be true when comparing a polymeric based thermosiphon system with a high efficient thermosiphon system of conventional materials for DHW production in the southern Europe regions. When present values for total energy cost are assessed for the total DHW systems including both the solar heating system and the auxiliary electric heating system, the difference in energy cost between the polymeric and the traditional systems is markedly reduced. The main reason for the difference in results can be related to the difference in thermal performance between the two systems. It can be concluded that the choice of auxiliary heating source is of utmost importance for the economical competiveness of systems and that electric heating may not be the best choice.

Novel solar thermal collector systems in polymer design – Part 5: Fatigue characterization of engineering PA grades for pressurized integrated storage collectors
Novel solar thermal collector systems in polymer design – Part 5: Fatigue characterization of engineering PA grades for pressurized integrated storage collectors
2016 - PDF 0.94MB - Posted: 2016-10-21
By: Joerg Fischer*, Patrick R. Bradler, Mathias Schlaeger, Gernot M. Wallner, Reinhold W. Lang
Publisher: Energy Procedia, Elsevier
A novel aging test method considering the superimposed mechanical and environmental (temperature and environmental medium) loads representative for pressurized integrated storage collectors (ICS) is described. Engineering polyamide (PA) grades with short glass fiber (GF) reinforcement, which are of high relevance for endcaps of steel-pipe ICS absorbers or all-polymeric absorber/storage-tanks, are characterized on a specimen level. Therefore, specific test devices and test arrangements for fracture mechanics specimens with or without weld-line are implemented on an electro-dynamic test machine. Fatigue crack growth kinetics data are obtained by conducting cyclic mechanical loads under various environmental testing conditions. The experimental results of two glass-fiber reinforced PA grades, using compact type specimens, performed at two different temperatures (23 °C and 80 °C) and in two environmental media (air and water), are compared in terms of crack growth kinetics. Moreover, the influence of welding on the crack growth kinetics for one PA grade is shown. For all specimens (unwelded and welded) the fatigue crack growth rates are enhanced in water compared to air. In welded specimens the fatigue crack growth resistance is significantly reduced compared to unwelded specimens.
Novel solar thermal collector systems in polymer design – Part 3: aging behavior of PP absorber materials
Novel solar thermal collector systems in polymer design – Part 3: aging behavior of PP absorber materials
2016 - PDF 0.43MB - Posted: 2016-10-21
By: Markus Povacz, Gernot M. Wallner, Michael K. Grabmann*, Susanne Beißmann, Klemens Grabmayer, Wolfgang Buchberger, Reinhold W. Lang
Publisher: Energy Procedia, Elsevier
A novel, accelerated aging test method was used to characterize the long-term stability of commercial black-pigmented polypropylene (PP) model materials for solar thermal absorbers at elevated temperatures. The PP model materials investigated, PP-B1 and PP-B2, are based on carbon black pigmented PP block copolymer grades. Using an automatized planning technique, sliced 100 µm thick specimens were prepared, aged in hot air and heat carrier fluid (mixture of 60 vol.-% deionized water and 40 vol.-% commercial propylene glycol) at 95°C, 115°C and 135°C for up to 15,000 hours, and characterized in terms of various aging indicators (i.e., remaining primary stabilizer content, oxidation temperature, carbonyl index and ultimate mechanical properties). In general two major trends were discerned. First, the aging processes of the PP compounds depend on the stabilizer system, but even more heavily on the interaction of the stabilizers with the carbon black pigments and the structure and morphology of the polymer. Although the compound PP-B2 exhibited much faster stabilizer loss and an associated drop in oxidation temperature than PP-B1, mechanical investigations proved a better long-term stability for PP-B2. Second, it was shown for the compounds investigated that exposure to hot air causes harsher aging than exposure to hot heat carrier fluid. This is, presumably related to the reduced quantity of dissolved oxygen and triazole-based corrosion inhibitors used in the heat carrier fluid. While PP-B1 is use for absorbers in unglazed collectors and overheating-protected glazed collectors, the investigations clearly revealed that PP-B2 is a promising alternative.
Polymeric materials in solar-thermal systems - performance requirements and loads
Polymeric materials in solar-thermal systems - performance requirements and loads
2016 - PDF 1.91MB - Posted: 2016-10-21
By: Thomas Ramschak, Robert Hausner, Christian Fink
Publisher: Energy Procedia, Elsevier
A major basic problem in selecting appropriate polymeric materials and processing technology routes is related to the lack of well-defined functional and performance requirements on the component level and to material property requirements on the specimen level. Hence, in a first step several reference climate regions were defined for pumped systems (continental (Graz/Austria), moderate climate (Beijing/China)) and non-pumped systems (Mediterranean (Athens/Greece), hot and dry (Pretoria/South Africa), hot and humid (Fortaleza/Brazil)), respectively. For each of these reference regions various solar-thermal plant types (e.g., domestic hotwater systems for single family houses (pumped and thermosiphon); domestic hot-water systems for multi-family houses; solar combi-systems for domestic hot-water and space heating (pumped) were pre-defined and evaluated and optimized virtually by modelling and simulation. To determine performance requirements on the component level and to derive material property requirements on the specimen level all-purpose modelling and design tools for collectors were implemented and used which allow for the description of temperature profiles, stagnation conditions, efficiency curves, pressure losses, distribution of fluid and heat flow and the thermal and hydraulic optimisation of the whole collector.
Lifetime modeling of polypropylene absorber materials for overheating protected hot water collectors
Lifetime modeling of polypropylene absorber materials for overheating protected hot water collectors
January 2016 - PDF 0.48MB - Posted: 2018-07-02
By: G.M. Wallner, M. Povacz, R. Hausner, R.W. Lang
Publisher: Solar Energy, Elsevier

For the utilization of polymeric materials in high-demanding applications like solar thermal systems it is of utmost importance to define the performance requirements and to investigate the applicability of components for defined systems under service relevant conditions. This paper deals with the lifetime estimation of black-pigmented polypropylene (PP) absorber grades for overheating protected solar thermal collector systems for hot water preparation in five representative climate zones. Based on experimental aging data in hot air and heat carrier fluid at elevated temperatures (95 °C, 115 °C and 135 °C) and climatic input data, as well as deduced loading conditions and absorber temperature distributions, the lifetime was calculated using a theoretical and an empirical extrapolation approach and assuming cumulating damages in service relevant temperature intervals. Depending on the PP grade, the extrapolation method and the location, endurance limits ranging from 8 to 50 years were obtained. The PP grade with ß-spherulithic structures and less carbon black exhibited a superior performance (factor 2) compared to a well-established grade which is currently widely used for swimming pool absorbers.

A total cost perspective on use of polymeric materials in solar collectors - Importance of environmental performance on suitability
A total cost perspective on use of polymeric materials in solar collectors - Importance of environmental performance on suitability
July 2014 - PDF 0.71MB - Posted: 2018-07-04
By: Bo Carlsson, Helena Persson, Michaela Meir, John Rekstad
Publisher: Applied Energy, Elsevier

To assess the suitability of solar collector systems in which polymeric materials are used versus those in which more traditional materials are used, a case study was undertaken. In this case study a solar heating system with polymeric solar collectors was compared with two equivalent but more traditional solar heating systems: one with flat plate solar collectors and one with evacuated tube solar collectors. To make the comparison, a total cost accounting approach was adopted. The life cycle assessment (LCA) results clearly indicated that the polymeric solar collector system is the best as regards climatic and environmental performance when they are expressed in terms of the IPPC 100 a indicator and the Ecoindicator 99, H/A indicator, respectively. In terms of climatic and environmental costs per amount of solar heat collected, the differences between the three kinds of collector systems were small when compared with existing energy prices. With the present tax rates, it seems unlikely that the differences in environmental and climatic costs will have any significant influence on which system is the most favoured, from a total cost point of view. In the choice between a renewable heat source and a heat source based on the use of a fossil fuel, the conclusion was that for climatic performance to be an important economic factor, the tax or trade rate of carbon dioxide emissions must be increased significantly, given the initial EU carbon dioxide emission trade rate. The rate would need to be at least of the same order of magnitude as the general carbon dioxide emission tax rate used in Sweden. If environmental costs took into account not only the greenhouse effect but also other mechanisms for damaging the environment as, for example, the environmental impact factor Ecoindicator 99 does, the viability of solar heating versus that of a natural gas heating system would be much higher.

Simulation of a solar collector array consisting of two types of solar collectors, with and without convection barrier
Simulation of a solar collector array consisting of two types of solar collectors, with and without convection barrier
2014 - PDF 0.54MB - Posted: 2017-02-15
By: Federico Bava*, Simon Furbo, Bengt Perers
Publisher: Energy Procedia, Elsevier
The installed area of solar collectors in solar heating fields is rapidly increasing in Denmark. In this scenario even relatively small performance improvements may lead to a large increase in the overall energy production. Both collectors with and without polymer foil, functioning as convection barrier, can be found on the Danish market. Depending on the temperature level at which the two types of collectors operate, one can perform better than the other. This project aimed to study the behavior of a 14 solar collector row made of these two different kinds of collectors, in order to optimize the composition of the row. Actual solar collectors available on the Danish market (models HT-SA and HT-A 35-10 manufactured by ARCON Solar A/S) were used for this analysis. To perform the study, a simulation model in TRNSYS was developed based on the Danish solar collector field in Braedstrup. A parametric analysis was carried out by modifying the composition of the row, in order to find both the energy and economy optimum. © 2015 The Authors. Published by Elsevier Ltd. Peer-review by the scientific conference committee of SHC 2014 under responsibility of PSE AG.
Entwicklung eines Verfahrens für die Wirtschaftlichkeitsberechnung solarthermischer Anlagen: die LCOH Methode - Posted: 2017-10-05
By: Y. Louvet, S. Fischer, S. Furbo, F. Giovannetti, F. Mauthner, D. Mugnier, D. Philippen, K. Vajen
Publisher: 27. Symposium Thermische Solarenergie, Kloster Banz, 10.-12. Mai 2017

Ende 2015 began der Task 54 des Solar Heating and Cooling Programms der Inter-nationalen Energieagentur (IEA-SHC Task 54), Price reduction of solar thermal sys-tems. Ziele des Tasks sind Preisesenkungspotenziale für Solar thermische Anlagen zu identifizieren und konkreten technischen und wirtschaftlichen Pfade vorzuschla-gen, um die solaren Wärmegestehungskosten um bis zu 40 % zu reduzieren /1/. Kostensenkungen sind von entscheidender Bedeutung für die Branche, die seit ein paar Jahren mit einem Rückgang der Verkaufszahlen auf dem europäischen Markt konfrontiert ist. Im Rahmen des Tasks wurde daher ein transparentes Verfahren zur Wirtschaftlichkeitsberechnung und eine Kennzahl entwickelt werden, um das Preis-senkungspotenzial unterschiedlicher Lösungen miteinander vergleichen zu können.

Presentations

Impact of the Improvements Developed during IEA SHC Task 54 on the Levelised Cost of Heat (LCoHsol,fin)
Impact of the Improvements Developed during IEA SHC Task 54 on the Levelised Cost of Heat (LCoHsol,fin)
October 2018 - PDF 0.79MB - Posted: 2018-10-29
By: Dr. Karl-Anders Weiß Fraunhofer ISE and Dr. Stephan Fischer University of Stuttgart, IGTE
Publisher: ISEC Conference - Graz, Austria - 5 October 2018
Calculating the Levelized Cost of Heat (LCoH) for Reference Solar Thermal Systems
Calculating the Levelized Cost of Heat (LCoH) for Reference Solar Thermal Systems
October 2018 - PDF 0.38MB - Posted: 2018-10-29
By: François Veynandt, Yoann Louvet
Publisher: ISEC Conference - Graz, Austria - 5 October 2018
Introduction to IEA SHC Task 54
Introduction to IEA SHC Task 54
October 2018 - PDF 0.77MB - Posted: 2018-10-29
By: Dr. Michael Köhl - Fraunhofer Institute for Solar Energy Systems ISE Dr. Daniel Mugnier - TECSOL
Publisher: ISEC Conference - Graz, Austria - 5 October 2018
Improvements Developed during the IEA SHC Task 54
Improvements Developed during the IEA SHC Task 54
October 2018 - PDF 1.31MB - Posted: 2018-10-29
By: Dr. Alexander Thür, Dr. Federico Giovannetti, Dr. Stephan Fischer
Publisher: ISEC Conference - Graz, Austria - 5 October 2018
Novel polymeric materials for cost-efficient solarthermal systems
Novel polymeric materials for cost-efficient solarthermal systems
October 2018 - PDF 1.56MB - Posted: 2018-10-29
By: Gernot M. Wallner, R. Buchinger
Publisher: ISEC Conference - Graz, Austria - 5 October 2018
Les différentes tâches du programme Solar Heating and Cooling de l’AIE
Les différentes tâches du programme Solar Heating and Cooling de l’AIE
April 2018 - PDF 1.15MB - Posted: 2018-07-02
By: Mugnier Daniel
Publisher: Journée R&D ADEME Sophia Antipolis, France
Solar Thermal Value Chain and Cost Reduction Potential
Solar Thermal Value Chain and Cost Reduction Potential
April 2018 - PDF 0.5MB - Posted: 2018-07-02
By: Dr. Stephan Fischer
Publisher: Journée R&D ADEME Sophia Antipolis, France
Retour d’expérience sur les coûts et les obstacles rencontrés lors de l'installation solaire thermique en Europe
Retour d’expérience sur les coûts et les obstacles rencontrés lors de l'installation solaire thermique en Europe
April 2018 - PDF 0.62MB - Posted: 2018-07-02
By: Mugnier Daniel
Publisher: Journée R&D ADEME Sophia Antipolis, France
Le LCoH Appliqué Au Solaire Thermique - Méthodologie et résultats pour la France
Le LCoH Appliqué Au Solaire Thermique - Méthodologie et résultats pour la France
April 2018 - PDF 0.38MB - Posted: 2018-07-02
By: Yoann Louvet
Publisher: Journée R&D ADEME Sophia Antipolis, France
Cost Reduction by Standardization
Cost Reduction by Standardization
April 2018 - PDF 1.07MB - Posted: 2018-07-02
By: Dr. Stephan Fischer
Publisher: Journée R&D ADEME Sophia Antipolis, France
Cost Reduction Potential of Polymeric Collectors
Cost Reduction Potential of Polymeric Collectors
April 2018 - PDF 1.85MB - Posted: 2018-07-02
By: Michaela Meir
Publisher: Journée R&D ADEME Sophia Antipolis, France
Compétitivité des coûts du solaire thermique collectif
Compétitivité des coûts du solaire thermique collectif
April 2018 - PDF 0.55MB - Posted: 2018-07-02
By: François Veynandt
Publisher: Journée R&D ADEME Sophia Antipolis, France
Kosteneffiziente Solarthermische Systeme
Kosteneffiziente Solarthermische Systeme
October 2017 - PDF 0.56MB - Posted: 2018-07-02
By: Gernot M. Wallner
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Kostensenkung Solarthermischer Systeme
Kostensenkung Solarthermischer Systeme
October 2017 - PDF 0.61MB - Posted: 2018-07-02
By: Dr. Michael Köhl
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
The One World Solar System
The One World Solar System
October 2017 - PDF 4.39MB - Posted: 2018-07-02
By: Robert Buchinger
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Leistungsanforderungen an überhitzungsgeschützte Flachkollektorsysteme
Leistungsanforderungen an überhitzungsgeschützte Flachkollektorsysteme
October 2017 - PDF 2.01MB - Posted: 2018-07-02
By: Thomas Ramschak
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Global Aging and Lifetime Prediction - Polypropylene Absorbers Materials for pumped Systems
Global Aging and Lifetime Prediction - Polypropylene Absorbers Materials for pumped Systems
October 2017 - PDF 0.87MB - Posted: 2018-07-02
By: Michael K. Grabmann
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Integrierter Speicherkollektor aus technischen Kunststoffen
Integrierter Speicherkollektor aus technischen Kunststoffen
October 2017 - PDF 0.72MB - Posted: 2018-07-02
By: Georg Ziegler
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Screening von faserverstärkten Polyamiden für Speicherkollektorsysteme
Screening von faserverstärkten Polyamiden für Speicherkollektorsysteme
October 2017 - PDF 1.68MB - Posted: 2018-07-02
By: Patrick R. Bradler, Joerg Fischer, Gernot M. Wallner, Reinhold W. Lang
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Kostengünstige Solar Systeme mit Heat Pipe-Kollektoren
Kostengünstige Solar Systeme mit Heat Pipe-Kollektoren
October 2017 - PDF 1.28MB - Posted: 2018-07-02
By: Bert Schiebler
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Potentiale zur Kostensenkung in der Solarthermie auf Basis technischer Massnahmen
Potentiale zur Kostensenkung in der Solarthermie auf Basis technischer Massnahmen
October 2017 - PDF 0.98MB - Posted: 2018-07-02
By: Daniel Philippen
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Die LCoH-Methode zur Berechnung von Wärmegestehungskosten
Die LCoH-Methode zur Berechnung von Wärmegestehungskosten
October 2017 - PDF 3.91MB - Posted: 2018-02-05
By: Stephan Fischer
Publisher: Tagung Kosteneffiziente solarthermische Systeme, Linz 04.10.2017
Neue Ansätze zur Kostenreduzierung von Solarthermischen Systemen
Neue Ansätze zur Kostenreduzierung von Solarthermischen Systemen
May 2017 - PDF 0.47MB - Posted: 2018-07-02
By: Wolfgang Kramer, Frederic Diels, Axel Oliva
Publisher: 27. Symposium Thermische Solarenergie, Kloster Banz, 10.-12. Mai 2017
Challenges for Price Reduction of Solar Thermal Systems
Challenges for Price Reduction of Solar Thermal Systems
April 2016 - PDF 1.53MB - Posted: 2018-07-02
By: Dr. Michael Köhl, Sandrin Saile, Dr. Stephan Fischer
Publisher: ESTTP-ESTIF-workshop Brussels, April 25, 2016

Highlights

Task 54 Highlights 2017
Task 54 Highlights 2017
February 2018 - PDF 0.42MB - Posted: 2018-02-12
One of the greatest challenges of the 21st century is to secure a sustainable energy supply and to considerably reduce CO2 emissions and the serious consequence of climate change. The challenging goals with regard to the contributions of renewable energy cannot be reached without considerable growth of solar thermal markets worldwide. Therefore, cost-competitive, efficient and reliable solar thermal systems are required. Cost-competitiveness is particularly hard to achieve as the price of solar thermal systems is still not equaled by the price end-users have to pay for conventional heat supply.
Task 54 Highlights 2016
Task 54 Highlights 2016
April 2017 - PDF 0.73MB - Posted: 2017-04-17

SHC Task 54 aims to reduce the purchase price for end-users of installed solar thermal systems by evaluating and developing sustainable means to reduce the production and/or installation costs of materials, sub-components and system components. Special emphasis is being placed on the identification and reduction of post-production cost drivers (e.g., channels of distribution). An extensive market research, the definition of reference systems, cost analyses and the study of socio-political boundary conditions for solar thermal prices in selected regions will provide the basis for the evaluation of cost structures and cost reduction potential. Additionally, ways to make solar thermal more attractive by improving marketing and consumer-oriented designs are being explored.

Task 54 Highlights 2015
Task 54 Highlights 2015
April 2016 - PDF 0.72MB - Posted: 2016-04-08
One of the greatest challenges of the 21st century is to secure a sustainable energy supply and to considerably reduce CO2 emissions and the potential serious consequences of climate change. The challenging goals with regard to the contributions of renewable energy cannot be obtained without considerable growth of the solar thermal markets worldwide. Therefore, cost-competitive, efficient and reliable solar thermal systems are required. The first of these attributes is particularly hard to achieve as the prices for the production of solar thermal systems are still far from being equalled by the prices end-users have to pay. A great number of complex, costly and oftentimes non-transparent work steps are needed in order to bring solar thermal from the factory to the actual users. Task 54 is looking for ways to optimize each of these steps and is also looking into the social political contexts in which solar thermal installations are embedded. The ultimate goal is to strengthen the solar thermal industry by finding solutions for the cost-efficient production and installation of solar thermal systems and their marketing at a competitive price.

Tools & Software

Levelized Cost of Heat (LCoH) Tool
November 2018 - XLS 0.25MB - Posted: 2018-11-05
Publisher: Task 54

The Task 54 LCoH-Tool provides an easy-to-use method for calculating the Levelized Cost of Heat (LCoH) of solar thermal systems and also other heating systems. The LCoH-Tool can be used to assess different strategies for cost reduction regarding their effects on the heat cost for the end-consumers.