Performance enhancement of conventional combined cycle power plant by inlet air cooling, intercooling and LNG cold energy utilisation.

Shi, Xiaojun, Agnew, Brian, Che, Defu and Gao, Jianmin (2010) Performance enhancement of conventional combined cycle power plant by inlet air cooling, intercooling and LNG cold energy utilisation. Applied Thermal Engineering, 30 (14-15). pp. 2003-2010. ISSN 1359-4311

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Abstract

This paper has proposed an integrated advanced thermal power system to improve the performance of the conventional combined cycle power plant. Both inlet air cooling and inter-cooling are utilized within the proposed system to limit the decrease of the air mass flow contained in the given volume flow as well as reduce the compression power required. The latent heat of spent steam from a steam turbine and the heat extracted from the air during the compression process are used to heat liquefied natural gas (LNG) and generate electrical energy. The conventional combined cycle and the proposed power system are simulated using the commercial process simulation package IPSEpro. A parametric analysis has been performed for the proposed power system to evaluate the effects of several key factors on the performance. The results show that the net electrical efficiency and the overall work output of the proposed combined cycle can be increased by 2.8% and 76.8 MW above those of the conventional combined cycle while delivering 75.8 kg s−1 of natural gas and saving 0.9 MW of electrical power by removing the need for sea water pumps used hitherto. Compared with the conventional combined cycle, the proposed power system performance has little sensitivity to ambient temperature changes and shows good off-design performance.

Item Type:	Article
Uncontrolled Keywords:	combined cycle, inlet air cooling, inter-cooling, Low-grade waste heat recovery, thermodynamic analysis, IPSEpro
Subjects:	H800 Chemical, Process and Energy Engineering
Department:	Faculties > Engineering and Environment > Architecture and Built Environment
Depositing User:	Neil Tait
Date Deposited:	11 Apr 2012 10:17
Last Modified:	13 Oct 2019 00:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/6106

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