Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor

A district heating system for household heating and road snow melting utilizing waste heat from Gas Turbine High-Temperature Reactors of 300 MW (GTHTR300s), a high-temperature gas-cooled reactor design, was analyzed. The application area was set in Sapporo and Ishikari, cities with heavy snowfall in...

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Autores principales:	Seiji KASAHARA, Tetsuya MURATA, Yu KAMIJI, Atsuhiko TERADA, Xing YAN, Yoshiyuki INAGAKI, Michitsugu MORI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	high-temperature gas-cooled reactor gthtr300 waste heat application district heating heat-transfer modeling Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/28b49ea1d11143ecb608415518b08ff3
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spelling	oai:doaj.org-article:28b49ea1d11143ecb608415518b08ff32021-11-26T06:51:30ZHeat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor2187-974510.1299/mej.15-00616https://doaj.org/article/28b49ea1d11143ecb608415518b08ff32016-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/3/3_15-00616/_pdf/-char/enhttps://doaj.org/toc/2187-9745A district heating system for household heating and road snow melting utilizing waste heat from Gas Turbine High-Temperature Reactors of 300 MW (GTHTR300s), a high-temperature gas-cooled reactor design, was analyzed. The application area was set in Sapporo and Ishikari, cities with heavy snowfall in northern Japan. The heat transport analyses were performed by modeling heat-transfer components in the system to estimate the system's overall heat supply profile. These components included the pipelines of the secondary water loops between the GTHTR300s and the heat-application area; heat exchangers to transfer the heat from the secondary loops to the tertiary water loops of the district-heating pipes; and the district-heating pipes of the tertiary loops between the heat exchangers and houses and roads. Single- and double-pipes for the secondary loops were compared. Although the double-pipes were advantageous for having less heat loss and a smaller excavation area, these advantages did not compensate for the higher construction cost of the pipes. To satisfy the heat demand of the application area in the month of maximum requirement, 520-529 MW of heat were supplied by 3 GTHTR300s and delivered by 6 secondary loops, 3,450 heat exchangers about 90 m long, and 3,450 tertiary loops. More efficient designs for the heat exchangers and improvements to the tertiary loops applying branched flow networks are desired to reduce the number of heat exchangers and tertiary loops and to make the heat exchangers smaller. Heat lost to the ground from the tertiary loops comprised 80%-90% of the heat loss. Applications of the larger pipe or loops using the branched flow network or double-pipe are required for more efficient heat utilization. More than 90% of the construction cost went into thermal insulators. The thickness and properties of the insulator must be reevaluated for economical heat delivery.Seiji KASAHARATetsuya MURATAYu KAMIJIAtsuhiko TERADAXing YANYoshiyuki INAGAKIMichitsugu MORIThe Japan Society of Mechanical Engineersarticlehigh-temperature gas-cooled reactorgthtr300waste heat applicationdistrict heatingheat-transfer modelingMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 3, Pp 15-00616-15-00616 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-temperature gas-cooled reactor gthtr300 waste heat application district heating heat-transfer modeling Mechanical engineering and machinery TJ1-1570
spellingShingle	high-temperature gas-cooled reactor gthtr300 waste heat application district heating heat-transfer modeling Mechanical engineering and machinery TJ1-1570 Seiji KASAHARA Tetsuya MURATA Yu KAMIJI Atsuhiko TERADA Xing YAN Yoshiyuki INAGAKI Michitsugu MORI Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor
description	A district heating system for household heating and road snow melting utilizing waste heat from Gas Turbine High-Temperature Reactors of 300 MW (GTHTR300s), a high-temperature gas-cooled reactor design, was analyzed. The application area was set in Sapporo and Ishikari, cities with heavy snowfall in northern Japan. The heat transport analyses were performed by modeling heat-transfer components in the system to estimate the system's overall heat supply profile. These components included the pipelines of the secondary water loops between the GTHTR300s and the heat-application area; heat exchangers to transfer the heat from the secondary loops to the tertiary water loops of the district-heating pipes; and the district-heating pipes of the tertiary loops between the heat exchangers and houses and roads. Single- and double-pipes for the secondary loops were compared. Although the double-pipes were advantageous for having less heat loss and a smaller excavation area, these advantages did not compensate for the higher construction cost of the pipes. To satisfy the heat demand of the application area in the month of maximum requirement, 520-529 MW of heat were supplied by 3 GTHTR300s and delivered by 6 secondary loops, 3,450 heat exchangers about 90 m long, and 3,450 tertiary loops. More efficient designs for the heat exchangers and improvements to the tertiary loops applying branched flow networks are desired to reduce the number of heat exchangers and tertiary loops and to make the heat exchangers smaller. Heat lost to the ground from the tertiary loops comprised 80%-90% of the heat loss. Applications of the larger pipe or loops using the branched flow network or double-pipe are required for more efficient heat utilization. More than 90% of the construction cost went into thermal insulators. The thickness and properties of the insulator must be reevaluated for economical heat delivery.
format	article
author	Seiji KASAHARA Tetsuya MURATA Yu KAMIJI Atsuhiko TERADA Xing YAN Yoshiyuki INAGAKI Michitsugu MORI
author_facet	Seiji KASAHARA Tetsuya MURATA Yu KAMIJI Atsuhiko TERADA Xing YAN Yoshiyuki INAGAKI Michitsugu MORI
author_sort	Seiji KASAHARA
title	Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor
title_short	Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor
title_full	Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor
title_fullStr	Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor
title_full_unstemmed	Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor
title_sort	heat transport analysis in a district heating system applying waste heat from gthtr300, a commercial design of high-temperature gas-cooled reactor
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/28b49ea1d11143ecb608415518b08ff3
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Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor

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