Thermo-Economic Analysis of Absorption Chiller Integrated with a GE-F5 for Power Enhancement

The efficiency and output power of gas turbine power plants are heavily affected by ambient air temperature and will strictly decrease by increasing the air temperature. In this paper, the effect of applying an absorption chiller by recovering waste heat from gas turbine flue gas has been investigated. For this purpose, the behavior of a GE-F5 gas turbine was modeled by coding in MATLAB software. According to full-scale monitor and measurement, the results show that by decreasing the inlet temperature to near dew point temperature, the output power would increase about 3.135 MW, which is considerable amount in comparison with the power capacity equals 25 MW. Also, application of chiller system on a GEF5 gas unit in Yazd Zanbagh power plant was analyzed economically. The payback period for the project was obtained to be estimated 11 years, whereas no subsiding considerations, the payback time would be shorter nearby 45% at all. By considering social cost of carbon, payback period decreases to 7 years and 6 months.