The Feasibility Study of a Night Sky Radiative Cooling System for Cooling the Intake Air of a Gas Turbine

Document Type : Research Article

Authors

Mechanical engineering department- Engineering faculty- Unversity of Sistan and Balouchestan- Zahedan- Iran

Abstract

The compressor inlet air cooling, especially in hot climates, has a significant effect on the power output augmentation of the gas turbines. The water consumption in evaporative cooling and fogging systems and power consumption and investment cost in vapor absorption and compression refrigeration systems are high. So, the purpose of this article is to investigate the possibility of using the night sky radiative cooling system for cooling the intake air of the compressor. In this method, the circulating water used to cool the intake air of the compressor, at night and in the exchange of radiation with the sky, is cooled using glassless flat plate collectors and returns to the storage tank for reuse on the next day. The effect of parameters such as the number and arrangement of collectors in series or parallel on the cooling capacity is investigated. Also, the required storage tank volume for returned water from collectors is calculated. The results show that the compressor’s intake air cooling for six hours a day needs a storage tank with a minimum capacity of 1000 m3. Also, by using 400 parallel collectors and a 1000 m3 storage tank, the power production increases by an average of 2 MWh.

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Main Subjects


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