Exergy analysis for a combined system of steam-injected gas turbine cogeneration and multiple-effect evaporation

An exergy analysis has been used for a combination of steam-injected gas tu rbine cogeneration system and forward-feed triple-effect evaporation proces s, with and without vapour recompression, The fuel utilization efficiency, power-heat ratio and second-law efficiency are examined for evaluation of t he thermal system performance. It is shown that the interaction between the combustion irreversibility and the exhaust exergy losses is dominant in go verning the system efficiency with various steam injection ratios and feeds tock mass flowrates, The compressor and gas turbine losses are shown to hav e a relatively small influence.