Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)

Heat exchangers are widely used for heating, cooling, evaporation, and condensation. There are many types of heat exchangers, shell and tube, fin tube, and double tube heat exchangers. Double tube heat exchangers show high performance, and several modifications have been made with regard to their pi...

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Autores principales:	Toshihiko SHAKOUCHI, Ryosuke OZAWA, Koichi TSUJIMOTO, Toshitake ANDO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	heat transfer heat exchanger double tube heat exchanger petal-shaped double tube bubbly flow pressure loss heat transfer performance Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/dfd659c6a9c94e7b812b54743256b620
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spelling	oai:doaj.org-article:dfd659c6a9c94e7b812b54743256b6202021-11-26T06:58:33ZFlow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)2187-974510.1299/mej.16-00138https://doaj.org/article/dfd659c6a9c94e7b812b54743256b6202016-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00138/_pdf/-char/enhttps://doaj.org/toc/2187-9745Heat exchangers are widely used for heating, cooling, evaporation, and condensation. There are many types of heat exchangers, shell and tube, fin tube, and double tube heat exchangers. Double tube heat exchangers show high performance, and several modifications have been made with regard to their pipe geometry to further improve their performance. A petal-shaped double tube with a large wetted perimeter is one such example. The working fluid of a heat exchanger for the evaporator and condenser of an air-conditioner or boiler may become a gas-liquid two-phase flow with phase change. In this study, the flow and heat transfer characteristics of air-water bubbly flow through a petal-shaped double tube with a large wetted perimeter are examined experimentally and compared with those of a conventional circular double tube. The experiments employed two petal-shaped double tubes: one with six petals and another with five petals. This study explains for single-phase water and two-phase air-water bubbly flows. The heat transfer characteristics are studied by measuring the temperature distributions in the inner and outer pipes by a thermo couple. The study also clarifies the effects of air bubbles on heat transfer performance.Toshihiko SHAKOUCHIRyosuke OZAWAKoichi TSUJIMOTOToshitake ANDOThe Japan Society of Mechanical Engineersarticleheat transferheat exchangerdouble tube heat exchangerpetal-shaped double tubebubbly flowpressure lossheat transfer performanceMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00138-16-00138 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	heat transfer heat exchanger double tube heat exchanger petal-shaped double tube bubbly flow pressure loss heat transfer performance Mechanical engineering and machinery TJ1-1570
spellingShingle	heat transfer heat exchanger double tube heat exchanger petal-shaped double tube bubbly flow pressure loss heat transfer performance Mechanical engineering and machinery TJ1-1570 Toshihiko SHAKOUCHI Ryosuke OZAWA Koichi TSUJIMOTO Toshitake ANDO Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)
description	Heat exchangers are widely used for heating, cooling, evaporation, and condensation. There are many types of heat exchangers, shell and tube, fin tube, and double tube heat exchangers. Double tube heat exchangers show high performance, and several modifications have been made with regard to their pipe geometry to further improve their performance. A petal-shaped double tube with a large wetted perimeter is one such example. The working fluid of a heat exchanger for the evaporator and condenser of an air-conditioner or boiler may become a gas-liquid two-phase flow with phase change. In this study, the flow and heat transfer characteristics of air-water bubbly flow through a petal-shaped double tube with a large wetted perimeter are examined experimentally and compared with those of a conventional circular double tube. The experiments employed two petal-shaped double tubes: one with six petals and another with five petals. This study explains for single-phase water and two-phase air-water bubbly flows. The heat transfer characteristics are studied by measuring the temperature distributions in the inner and outer pipes by a thermo couple. The study also clarifies the effects of air bubbles on heat transfer performance.
format	article
author	Toshihiko SHAKOUCHI Ryosuke OZAWA Koichi TSUJIMOTO Toshitake ANDO
author_facet	Toshihiko SHAKOUCHI Ryosuke OZAWA Koichi TSUJIMOTO Toshitake ANDO
author_sort	Toshihiko SHAKOUCHI
title	Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)
title_short	Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)
title_full	Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)
title_fullStr	Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)
title_full_unstemmed	Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)
title_sort	flow and heat transfer of petal-shaped double tube (water and air-water bubbly flow)
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/dfd659c6a9c94e7b812b54743256b620
work_keys_str_mv	AT toshihikoshakouchi flowandheattransferofpetalshapeddoubletubewaterandairwaterbubblyflow AT ryosukeozawa flowandheattransferofpetalshapeddoubletubewaterandairwaterbubblyflow AT koichitsujimoto flowandheattransferofpetalshapeddoubletubewaterandairwaterbubblyflow AT toshitakeando flowandheattransferofpetalshapeddoubletubewaterandairwaterbubblyflow
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Flow and heat transfer of petal-shaped double tube (Water and air-water bubbly flow)

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