Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region

The climate conditions have a powerful influence on combined cycle power plant performance as its known. Total output power and overall thermal efficiency of the power plant dropping under the high ambient temperatures that often occur during the hot days. This is a major drawback for combined cycle...

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Main Author:	Hayder Baqer, Mahdi
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TD Environmental technology Sanitary engineering TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/13094/19/Effect%20of%20ambient%20temperature%20on%20the%20performance%20of%20combined%20cycle%20power%20plant%20with%20cooling%20system%20in%20a%20subtropical%20region.pdf
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spelling	my-ump-ir.130942021-11-08T23:50:19Z Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region 2016-02 Hayder Baqer, Mahdi TD Environmental technology. Sanitary engineering TJ Mechanical engineering and machinery The climate conditions have a powerful influence on combined cycle power plant performance as its known. Total output power and overall thermal efficiency of the power plant dropping under the high ambient temperatures that often occur during the hot days. This is a major drawback for combined cycle power plant operated in a subtropical region. In the Middle East where this study was carried out, the ambient temperature typically varies between (15C) and (45C). The Plant has been studied consist of three gas turbines with total power (535MW) and three triple-pressure heat recovery steam generators, addition one steam turbine with (345 MW) output power. The overall thermal efficiency of power plant is (57.7%). In this study, combined cycle power plant was used for assessment of the performance with the changes in ambient air temperature. Two approaches were used to study this phenomenon. Firstly, the performance parameters were calculated by using actual data acquired by the operation history of the power plant. Secondly, the performance was analyzed using thermodynamic principles. Then results of the two approaches were compared and optimizing using RBFNN method. Cooling the gas turbine inlet air can improve the power plant performance substantially. This occurs due to the cooled air is denser, giving the compressor a higher mass flow rate and resulting in increased output power and efficiency of the power plant. Single effect LiBr absorption chiller proposed as a cooling system to cool the ambient air temperature at (15 C). The average reduction in power output per degree Celsius is about (1.82 MW). Cooling of inlet air from (45°C) down to (15°C) would increase the power output around (50.04MW). Where every decline in temperature by (10°C) adding to the total output power of (16 MW). The average reduction in the overall thermal efficiency per degree Celsius is about (0.217%). In addition, the cooling of inlet air from (45°C) down to (15°C) would increase the overall thermal efficiency around (6.091%). Where every decline in the temperature by (10°C), that increases the overall thermal efficiency around (2.03%). The results of using this cooling technique are increasing the total output power and overall thermal efficiency to (875 MW), (58%) respectively. The effect of using radial basis function neural network (RBFNN) technique give the average deviation about (1.2%) and (1.7%) for the power output and thermal efficiency respectively. 2016-02 Thesis http://umpir.ump.edu.my/id/eprint/13094/ http://umpir.ump.edu.my/id/eprint/13094/19/Effect%20of%20ambient%20temperature%20on%20the%20performance%20of%20combined%20cycle%20power%20plant%20with%20cooling%20system%20in%20a%20subtropical%20region.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Mechanical Engineering
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TD Environmental technology Sanitary engineering TJ Mechanical engineering and machinery
spellingShingle	TD Environmental technology Sanitary engineering TJ Mechanical engineering and machinery Hayder Baqer, Mahdi Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
description	The climate conditions have a powerful influence on combined cycle power plant performance as its known. Total output power and overall thermal efficiency of the power plant dropping under the high ambient temperatures that often occur during the hot days. This is a major drawback for combined cycle power plant operated in a subtropical region. In the Middle East where this study was carried out, the ambient temperature typically varies between (15C) and (45C). The Plant has been studied consist of three gas turbines with total power (535MW) and three triple-pressure heat recovery steam generators, addition one steam turbine with (345 MW) output power. The overall thermal efficiency of power plant is (57.7%). In this study, combined cycle power plant was used for assessment of the performance with the changes in ambient air temperature. Two approaches were used to study this phenomenon. Firstly, the performance parameters were calculated by using actual data acquired by the operation history of the power plant. Secondly, the performance was analyzed using thermodynamic principles. Then results of the two approaches were compared and optimizing using RBFNN method. Cooling the gas turbine inlet air can improve the power plant performance substantially. This occurs due to the cooled air is denser, giving the compressor a higher mass flow rate and resulting in increased output power and efficiency of the power plant. Single effect LiBr absorption chiller proposed as a cooling system to cool the ambient air temperature at (15 C). The average reduction in power output per degree Celsius is about (1.82 MW). Cooling of inlet air from (45°C) down to (15°C) would increase the power output around (50.04MW). Where every decline in temperature by (10°C) adding to the total output power of (16 MW). The average reduction in the overall thermal efficiency per degree Celsius is about (0.217%). In addition, the cooling of inlet air from (45°C) down to (15°C) would increase the overall thermal efficiency around (6.091%). Where every decline in the temperature by (10°C), that increases the overall thermal efficiency around (2.03%). The results of using this cooling technique are increasing the total output power and overall thermal efficiency to (875 MW), (58%) respectively. The effect of using radial basis function neural network (RBFNN) technique give the average deviation about (1.2%) and (1.7%) for the power output and thermal efficiency respectively.
format	Thesis
qualification_level	Master's degree
author	Hayder Baqer, Mahdi
author_facet	Hayder Baqer, Mahdi
author_sort	Hayder Baqer, Mahdi
title	Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
title_short	Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
title_full	Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
title_fullStr	Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
title_full_unstemmed	Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
title_sort	effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Mechanical Engineering
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/13094/19/Effect%20of%20ambient%20temperature%20on%20the%20performance%20of%20combined%20cycle%20power%20plant%20with%20cooling%20system%20in%20a%20subtropical%20region.pdf
_version_	1783731977150529536

Effect of ambient temperature on the performance of combined cycle power plant with cooling system in a subtropical region

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