Abstract
Introducing intercooling in gas turbine cycle with regeneration and reheat increase the specific power without loss in thermal efficiency for combined heat and power system. In this paper. the first and second laws of thermodynamics have been utilized to evaluate the performance of intercooled reheat regenerative gas turbine based combined heat and power plant. The energetic and exergetic efficiencies have been defined, The effects of pressure losses, and process steam pressure on energetic and exergetic efficiencies have been investigated. The results indicate that the first-law efficiency is approximately independent of pressure losses. but the second-law efficiency and the power to heat ratio reflects the fact that the higher pressure drops degrade the thermodynamic performance significantly. Energetic efficiencies are approximately independent of process steam pressure, but the exergetic efficiency increases with the same. Performance data generated from these expressions should be useful to decision makers in the selection of optimal parameters at the system design stage.