THERMAL SCIENCE

International Scientific Journal

Ting Chen

,

Anping Wan

,

Ke Li

,

Xingwei Xiang

,

Qinglong Zhou

,

Qing Zuo

,

Liang Zhang

ENERGY AND EXERGY ANALYSES OF A COMBINED CYCLE POWER PLANT WITH INLET FUEL HEATING

ABSTRACT
By using exhaust gas as heating source, a combined cycle power plant with inlet fuel heating is investigated experimentally. Energy analysis and exergy analysis are carried out under different power load and ambient temperature. The results reveal that the thermal efficiency of the power plant system increases as power load increases. The thermal efficiency and power output at 5℃ are 54.15% and 412 MW, respectively, while when the ambient temperature is 35℃, the thermal efficiency and power output are 52.3% and 330 MW, respectively. Under the same conditions, the combustion chamber has the highest irreversibility rate, while the air compressor has the lowest. The irreversibility rate of the power plant system increases in line with power load. The second-law efficiency increases from 37.0-50.12% when the power load changes from 30-100%.
KEYWORDS
combined cycle power plant, Power load, efficiency, exergy
PAPER SUBMITTED: 2021-06-28
PAPER REVISED: 2021-08-19
PAPER ACCEPTED: 2021-08-26
PUBLISHED ONLINE: 2021-10-10
DOI REFERENCE: https://doi.org/10.2298/TSCI210628296C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 5, PAGES [3677 - 3687]
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Energy and exergy analyses of a combined cycle power plant with inlet fuel heating

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence