Abstract: A generator-heat pump composite device comprises an internal combustion engine, a transmission device, clutches, a heat pump and a generator, wherein the internal combustion engine is connected to the heat pump and the generator via the transmission device and the clutches, respectively. The fuel for the internal combustion engine may be natural gas or biogas, and the heat pump may be a mechanical vapor compression heat pump. When the internal combustion engine is in operation, the heat pump and/or the generator can be selectively driven by engagement or disengagement of the clutches, for selectively generating electricity and/or cold and heat.

Abstract: An energy regeneration system comprises a heat pump, a bioreactor, a combustor, and a temperature difference electricity generation device. The heat pump is provided for thermally regulating the bioreactor and can be used for air-condition, dehumidification, refrigeration, chilling, heating and/or supplying hot water for bath. The bioreactor accommodates an organic material. The organic material is converted into a biomass fuel and other materials by microbial action. The chemical energy of the biomass fuel is converted into a heat energy by the combustor for actuating the temperature difference electricity generation device, thereby generating electrical energy.