Abstract
Gas turbine engines are characterized by low efficiency at part load. To conserve energy and reduce operating costs, waste heat can be recovered by combining a heat exchange gas turbine cycle with a closed organic Rankine cycle. A computer program was formulated to calculate parametrically the individual and combined cycle performance efficiencies. Gas turbine pressure ratio, maximum cycle temperature, fluid-air mass ratio, and type of working fluid were the parameters of interest. Maximum cycle temperature and pressure ratio were shown to be the most important parameters.