energy and exergo-economic assessments of gas turbine based chp systems: a case study of spgc utility plant

Combined heat and power systems are becoming more and more important, regarding their enhanced efficiency, energy saving, and environmental aspects. in the peresent study, three configurations of combined heat and power systems are intended as an alternative to separate production plant by considering environmental aspects. first and second laws of thermodynamics are adapted to the operating data. the energy and exergy indicators, their distribution and exergy loss are evaluated. the economic analysis was done by determining the rate of return on investment, payback period and net present worth. the optimal configuration of system equipment has been determined based on economic feasibility and emission saving in view of power and steam demand. the method employed here may be applied to making a decision on the adoption of the combined plant to any separate heat and power systems.