23 September 2011
Most heat pumps as well as chillers, providing the building sector with heat or cold respectively, are driven by electricity. However, the substitution of the electrically driven compressor by the use of a thermally driven might lead to significant primary energy savings, especially if the heat is provided via solar or waste heat. To quantify this, a project by the International Energy Agency (IEA), named Annex 34 – Thermally Driven Heat Pumps for Heating and Cooling, has been bring into being. In this article the general aim of Annex 34 is
pointed out followed by a detailed Task structure with each corresponding goal. In addition, the technology is introduced containing the physical process of thermal cooling and an
example of adsorber development as further an example of system integration. The article concludes with the state-of-the-art in Task development and future prospects.