Thermo-economic analysis of absorption chiller integrated with a GE-F5 gas turbine for power enhancement (Zanbagh power plant, studied case)

Document Type: Research Paper


1 Energy Department, Materials and Energy Research Center (MERC), Tehran, Iran.

2 Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran.


The efficiency and output power of gas turbine power plants are heavily affected by ambient air temperature. To compensate this defect, some cooling technologies and technics are applied. 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, and the code was in relation to a complete full-scale monitor and measurement on an operating unit, in Yazd Zanbagh power plant located in IRAN, Coordinates 31.9318° N and 54.3184° E .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. 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.


Main Subjects

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