Performance Evaluation of a Simple Gas Turbine Power Plant Using Vapour Absorption Chiller
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 2
Abstract
The performance of gas turbines in whichever way is operated; either as a simple cycle or a combined cycle is critically constrained by the prevailing ambient temperature, predominantly in arid or tropical climates Sub-Sahara Africa countries like Nigeria. In this present work, performance evaluation of a simple gas turbine power plant using vapour absorption chiller was carried out. A retrofitted power plant is modeled using IPSEpro software that utilizes waste heat from exhaust gas of the base power plant to generate steam in a heat exchanger. Part of the steam generated is used to power lithium bromide single-effect vapour absorption chillers which in turn cool the incoming air to the compressor. The results obtained show that the vapour absorption cooling system reduces the inlet temperature to the compressor from 25.70C to 15.0650C. Also, the mass of air increased by 13.23kg/s, thereby boosting the power output with an increment of 3.5MW and thermal efficiency of 1.12%. Moreover, the specific fuel consumption reduces by 0.0079Kg/KWh and the net station heat rate reduces by 369KJ/KWh. This signified that less energy is consumed to generate higher power output and the retrofitted power plant will be more efficient than the existing power plant. Furthermore, greenhouse gas emission saving was analyzed. The result showed a net savings of 276.654kg greenhouse gases.
Authors and Affiliations
S. I. Ukwamba, E. K. Orhorhoro, A. A. Omonoji
Keywords
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- EP ID EP437850
- DOI 10.9790/1684-1502051318.
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