Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants

Output increase of combined cycle power plants is highly expected in order to deal with tight supply-demand situation of electricity and to save fuel consumption. This paper reports improvement of the output increase method by cooling their suction air using water spray nozzles. The spray nozzles in...

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Autores principales:	Shuichi UMEZAWA, Katsuhiko SUGITA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	gas turbine combined cycle output increase suction air cooling water spray nozzle Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/a81a6dba30784fb68a7dbd64ed4d42a4
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spelling	oai:doaj.org-article:a81a6dba30784fb68a7dbd64ed4d42a42021-11-26T06:55:30ZImprovement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants2187-974510.1299/mej.16-00319https://doaj.org/article/a81a6dba30784fb68a7dbd64ed4d42a42016-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/5/3_16-00319/_pdf/-char/enhttps://doaj.org/toc/2187-9745Output increase of combined cycle power plants is highly expected in order to deal with tight supply-demand situation of electricity and to save fuel consumption. This paper reports improvement of the output increase method by cooling their suction air using water spray nozzles. The spray nozzles installed previously are pointing to downstream of air flow or downward. We tried to improve its cooling efficiency by optimizing the spray nozzle angle. Laboratory experiments were conducted for that purpose. Suction air area was 2 meter square, and air flow velocity was set to approximately 2 meter/sec. by a blower. Temperature and relative humidity were set to 33 degrees centigrade and 60 percent respectively by air-conditioning units. As a result, a method that the spray nozzles are pointing upstream of air flow showed the best performance. The same tendency was also observed by finite volume analysis using a CFD program. This method was applied at both a working combined cycle power plant of 380 MW and that of 500 MW on trial. Temperature of cooled air was measured using a number of thermocouples set in suction air room at each plant. Consequently, it was observed that the cooling efficiency was improved by ten percent and several percent respectively, and plant output was increased by approximately 2 MW at the 380 MW plant.Shuichi UMEZAWAKatsuhiko SUGITAThe Japan Society of Mechanical Engineersarticlegas turbinecombined cycleoutput increasesuction air coolingwater spraynozzleMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 5, Pp 16-00319-16-00319 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	gas turbine combined cycle output increase suction air cooling water spray nozzle Mechanical engineering and machinery TJ1-1570
spellingShingle	gas turbine combined cycle output increase suction air cooling water spray nozzle Mechanical engineering and machinery TJ1-1570 Shuichi UMEZAWA Katsuhiko SUGITA Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
description	Output increase of combined cycle power plants is highly expected in order to deal with tight supply-demand situation of electricity and to save fuel consumption. This paper reports improvement of the output increase method by cooling their suction air using water spray nozzles. The spray nozzles installed previously are pointing to downstream of air flow or downward. We tried to improve its cooling efficiency by optimizing the spray nozzle angle. Laboratory experiments were conducted for that purpose. Suction air area was 2 meter square, and air flow velocity was set to approximately 2 meter/sec. by a blower. Temperature and relative humidity were set to 33 degrees centigrade and 60 percent respectively by air-conditioning units. As a result, a method that the spray nozzles are pointing upstream of air flow showed the best performance. The same tendency was also observed by finite volume analysis using a CFD program. This method was applied at both a working combined cycle power plant of 380 MW and that of 500 MW on trial. Temperature of cooled air was measured using a number of thermocouples set in suction air room at each plant. Consequently, it was observed that the cooling efficiency was improved by ten percent and several percent respectively, and plant output was increased by approximately 2 MW at the 380 MW plant.
format	article
author	Shuichi UMEZAWA Katsuhiko SUGITA
author_facet	Shuichi UMEZAWA Katsuhiko SUGITA
author_sort	Shuichi UMEZAWA
title	Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
title_short	Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
title_full	Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
title_fullStr	Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
title_full_unstemmed	Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
title_sort	improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/a81a6dba30784fb68a7dbd64ed4d42a4
work_keys_str_mv	AT shuichiumezawa improvementofasuctionaircoolingmethodforcombinedcyclepowerplantsusingwatersprayanditsapplicationtoworkingplants AT katsuhikosugita improvementofasuctionaircoolingmethodforcombinedcyclepowerplantsusingwatersprayanditsapplicationtoworkingplants
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Improvement of a suction air cooling method for combined cycle power plants using water spray and its application to working plants

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