From thermodynamics Efficiency is determined by the absolute temperature of the surroundings E,(%1=0×100 T where Ec=Carnot efficiency,% T1 =absolute temperature of the boiler,K=C +273 T0=absolute temperature of the condenser(cooling water),K Since this is the best possible situation,any real-world system must be less efficient,or EsE UNEP From thermodynamics Efficiency is determined by the absolute temperature of the surroundings where Ec =Carnot efficiency, % T1 =absolute temperature of the boiler, ºK =ºC +273 T0 = absolute temperature of the condenser (cooling water), ºK Since this is the best possible situation, any real-world system must be less efficient，or