With thermally driven adsorption chillers, waste heat can be recovered in order to provide cold in the vehicle. Thus, the additional energy consumption for climatisation purposes can be reduced and the overall vehicle efficiency is raised directly. Furthermore, due to their energy storage ability of adsorption chillers, this technology can be used for park cooling. The Forschungsgesellschaft Kraftfahrwesen mbH Aachen (FKA) develops compact adsorption chillers for mobile applications as they can be taken into account for hybrid vehicles and electric cars.