23 March 2006

The feasibility of absorption chillers using low-temperature heat sources


Heat-driven cooling using environmentally safe refrigerants (e.g. salt and water) is a proven thermodynamic
short cut for energy-effi cient cooling. There is a theoretical potential of saving half of the
primary fuel needed to produce cooling as compared to conventional vapour compression technology.
In this context, the lower the heat source temperature requirement, the better suited it is for solar
cooling systems, for cooling production utilizing waste heat, or for combination of absorption cooling
with CHP. Researchers at KTH in conjunction with industry have worked on developing low-temperature
absorption technology concepts for over a decade. The results have been published in various
ways and some key issues from this research are presented here, along with main conclusions and
some thoughts on future R&D requirements.