VTT and German company ZAE Bayern have developed a solar-powered 10 kW chiller. This absorption chiller works in the same way as the gas refrigerators used in Finnish holiday cabins, for example. But in this case, a solar thermal collector is used instead of gas.  The method requires electricity for the flow pumps only.  If necessary, the chiller can also serve as a heat pump.

The results of the project showed that – to be used as a heating pump as well – an economically viable and competitive, solar-powered absorption chiller would need to be 50 kW or bigger.