An electrochemical heat pump system comprising an electrochemical pump, refrigerant-based cooling system, and gas-driven compressor. The electrochemical pump is capable of reversibly producing and consuming hydrogen gas. The cooling system comprises a condenser, compressor, and evaporator in thermal...http://www.google.de/patents/US6553771?utm_source=gb-gplus-sharePatent US6553771 - Electrochemical heat pump system
