cost effectively convert the lower temperature waste heat to power by doing this the high temperature refrigerant still has positive pressure and a corresponding larger density in the condenser 23 this results in a condenser with less pressure drop better heat transfer and smaller size all of which result in a more cost effective orc system the high pressure and larger density of the vapor exiting the turbine 19 also allows a smaller turbine design a substantial reduction in cost can be obtained by these modifications further the lower pressure ratio i e 5 1 at the turbine 19 allows for higher turbine efficiencies considering now that the temperature of the toluene vapor entering the condenser evaporator 23 is relatively high its energy can now be used as a heat source for a vapor generator of a second orc system 25 with the condenser evaporator 23 acting both as the condenser for the first orc system 20 and as the evaporator or boiler of the second orc 25 system the second orc system therefore has a turbine 26 a generator 27 a condenser 28 and a pump 29 the organic working fluid for the second orc must have relatively low boiling and condensation temperatures examples of organic working fluids that would be suitable for such a cycle are r245fa or isobutane in the second orc system 25 with r245fa as the organic working fluid the temperature of the working fluid passing to the turbine 26 would be around 250 u00b0 f and that of the vapor passing to the condenser would be about 90 u00b0 f after condensation of the vapor the refrigerant would be pumped to the condenser evaporator 23 by the pump 29 referring to fig5 an alternate.