Info Sheets

INFO Sheet B03: Reduction of Maintenance Costs by Preventing Overheating
INFO Sheet B03: Reduction of Maintenance Costs by Preventing Overheating
October 2018 - PDF 0.43MB
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 B04: Manufacturing Costs - <b>NEW</b>
INFO Sheet B04: Manufacturing Costs - NEW
Cost reduction during production by product standardisation and reduction of product variety in China
October 2018 - PDF 0.46MB
By: Ma Guangbai, Su Shiqiang, Stephan Fischer

China's market demand for solar energy products vary greatly, resulting in a large number of product models of production enterprises; large number types of the raw material, which leads to the high cost of raw material procurement, causes great difficulties to the production organization. An effective way to reduce the production and procurement cost is to reduce the number of products, so as to reduce the number of raw materials. The reduction of support materials and installation costs by prefabricated mounting brackets is another way to reduce the cost of the balcony installation solar system.

INFO Sheet B05: Levelized Cost of Heat for Solar Thermal Systems with Overheating Prevention
INFO Sheet B05: Levelized Cost of Heat for Solar Thermal Systems with Overheating Prevention
October 2018 - PDF 0.49MB
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 A15: Reference multi-family solar domestic hot water system. France - <b>NEW</b>
INFO Sheet A15: Reference multi-family solar domestic hot water system. France - NEW
September 2018 - PDF 0.5MB
By: Daniel Mugnier

This document lists the minimum information needed for the definition of a reference system. A reference system is a solar thermal system serving as benchmark for any other solar thermal system having the same fractional energy savings with respect to the levelized costs of heat (LCoH).

INFO Sheet A16: Reference System, France Drain-back multi-family solar domestic hot water system - <b>NEW</b>
INFO Sheet A16: Reference System, France Drain-back multi-family solar domestic hot water system - NEW
September 2018 - PDF 0.47MB
By: Daniel Mugnier

This document describes the reference drain-back domestic hot water system for multi-family houses in France. It lists the minimum information needed for the definition of a reference system. A reference system is a solar thermal system serving as benchmark for any other solar thermal system having the same fractional energy savings and the same scheme (drainback for multifamily buildings) with respect to the levelized costs of heat (LCoH).

INFO Sheet D01: Review of Installation Costs
INFO Sheet D01: Review of Installation Costs
September 2018 - PDF 0.16MB
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
INFO Sheet D02: Obstacles in Installation and Recommendations
September 2018 - PDF 0.18MB
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 A10: Reference System, Germany Solar Combisystem for Multi-Family House - <b>NEW</b>
INFO Sheet A10: Reference System, Germany Solar Combisystem for Multi-Family House - NEW
July 2018 - PDF 0.5MB
By: Sonja Helbig (ISFH), Oliver Mercker (ISFH), Federico Giovannetti (ISFH)

This document describes the reference solar combi system for domestic hot water preparation and space heating in multifamily houses (MFH) 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 combi system. Using these results the levelized cost of heat (LCOH) for the substituted fuel is calculated using eq. 1 and the reference costs for the investment of the system, installation, fuel and electricity costs. System model and cost assumptions are based on [1] and [2].

INFO Sheet B02: Effects of Technological Measures on Costs
INFO Sheet B02: Effects of Technological Measures on Costs
May 2018 - PDF 0.39MB
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
INFO Sheet D04: End-Users Decision Making Factors for H&C Systems
April 2018 - PDF 0.36MB
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
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
INFO Sheet A01: LCOH for Solar Thermal Applications - Guideline for levelized cost of heat (LCOH) calculations for solar thermal applications
December 2017 - PDF 0.5MB
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
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
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
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
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
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
INFO Sheet A07: Reference System, Germany Conventional heating system for single-family house
November 2017 - PDF 0.55MB
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
INFO Sheet A08: Reference System, Germany Solar domestic hot water system for single family house
November 2017 - PDF 0.58MB
By: Stephan Bachmann, Stephan Fischer, Bernd Hafner
Publisher: 10.18777/ieashc-task54-2017-0008

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
INFO Sheet A09: Reference System, Germany Solar Combisystem for single-family house
November 2017 - PDF 0.59MB
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
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
By: Simon Furbo, Janne Dragsted

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

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
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
INFO Sheet B01: Optimized Systems, Denmark - SDHW System with Heat Storage and Polymer Inlet Stratifier
November 2017 - PDF 0.46MB
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 C03: One-World-Solar-System
INFO Sheet C03: One-World-Solar-System
November 2017 - PDF 0.63MB
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 A17: Reference single family solar domestic hot water system for France - <b>NEW</b>
INFO Sheet A17: Reference single family solar domestic hot water system for France - NEW
October 2017 - PDF 0.49MB
By: Daniel Mugnier

This document lists the minimum information needed for the definition of a reference system. A reference system is a solar thermal system serving as benchmark for any other solar thermal system having the same fractional energy savings with respect to the levelized costs of heat (LCOH).

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
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
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.