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Annex 43 - Fuel Driven Sorption Heat Pumps

For residential and small scale commercial heating applications


During the work in Annex 34 “Thermally Driven Heat Pumps for Heating and Cooling” there was a rising interest in the area of fuel driven sorption heat pumps and more and more products came closer to market. Since we learned during the process of Annex 34 that the fields of solar thermal cooling and fuel driven heat pumping need different measures for a wider market penetration, there was a common understanding to continue this work in two different Annexes or Tasks. Therefore, the work of Annex 34 regarding solar thermal cooling is continued within the IEA SHC Task 48 “Quality assurance and support measures for Solar Cooling” while for the continuation of the fuel driven heat pumps part a new Annex “Fuel driven sorption heat pumps” was proposed to the ExCo in March 2012. After an Annex definition meeting a legal text was compiled and as draft accepted by the Exco, so Annex 43 started officially in July 2013 with a duration of four years. A kick-off meeting was held on 9./10. October 2013 in Freiburg with participants from six countries. Main topics were the finalisation of the Legal Text and the work plan and setting up the organisational framework.



The scope of the work under this Annex will be the usage of fuel driven sorption heat pumps in domestic and small commercial or industrial buildings or applications. If applicable the additional possibility of supplying cold will also be considered. The main goal is to widen the use of fuel driven heat pumps by accelerating technical development and market readiness of the technology, as well as to identify market barriers and supporting measures. A field test and proposing performance evaluation figures and optimal system layouts are among the means of this Annex.


The Annex Structure


Task A:   Generic Systems and System Classification

Available sources and heating systems

Existing market and regulatory boundary conditions

Evaluate different fuels (oil, gas, wood -> no hot water)

Task B:            Technology Transfer

Link research to industrial development for faster market penetration of new technologies

Novel materials (e.g. MOFs for adsorption heat pumps)

Novel components (integrated evaporators/condensers, compact heat exchangers)

System designs (e.g. façade collector as heat source)

Task C             Field test and performance evaluation

Measurement/monitoring procedures standardisation (e.g. how to cope with different fuel quality, system boundaries, aux.  energy etc.)

Continue work from Annex 34 and Task 44 and extend standards to seasonal performance factors on system level

Develop quality insurance procedures in cooperation with IEA SHC Task 48

Task D             Market potential study and technology roadmap

Simulation study to evaluate different technologies in different climate zones, different building types and building standards

Combine with market data and actual building stock for technology roadmap

Task E             Policy measures and recommendations, information


Workshops for planners, installers and decision makers

Develop recommendations for policies, e.g. building codes and funding schemes