Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD

In this paper, the impact of different factors on the flow boiling of R290 and R22 in double-concentric pipes are investigated through CFD numerical simulations. The numerical studies are performed by changing the inner tube diameter in the range of 3 to 7 mm, the refrigerant velocity between 1 and...

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Autores principales:	Jinfeng Wang, Shenglin Zhu, Jing Xie
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	R290 flow boiling numerical simulation pressure drop exergy loss Technology T
Acceso en línea:	https://doaj.org/article/f0df3c8e40e140d39949c0b17f0be451
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spelling	oai:doaj.org-article:f0df3c8e40e140d39949c0b17f0be4512021-11-11T15:54:43ZInvestigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD10.3390/en142171211996-1073https://doaj.org/article/f0df3c8e40e140d39949c0b17f0be4512021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7121https://doaj.org/toc/1996-1073In this paper, the impact of different factors on the flow boiling of R290 and R22 in double-concentric pipes are investigated through CFD numerical simulations. The numerical studies are performed by changing the inner tube diameter in the range of 3 to 7 mm, the refrigerant velocity between 1 and 5 m/s, the water velocity between 1 and 10 m/s and the saturation temperature in the range of 276 to 283 K. The heat transfer coefficient (HTC), pressure drop and exergy destruction of R290 are determined. The results show that HTC, pressure drop and exergy destruction are significantly impacted by the pipe diameter and the refrigerant velocity, but slightly impacted by water velocity and saturation temperature. Moreover, the exergy loss and pressure drop of R290 are 11.8–13.3% and 4.3–10.2% lower than those of R22. R290 has a lower energy loss than R22 in the evaporation process in the double-concentric pipe. However, the HTC of R290 is 57.3–59.7% lower than that of R22. The HTC of R290 can be optimized by increasing the pipe diameter or the R290 velocity.Jinfeng WangShenglin ZhuJing XieMDPI AGarticleR290flow boilingnumerical simulationpressure dropexergy lossTechnologyTENEnergies, Vol 14, Iss 7121, p 7121 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	R290 flow boiling numerical simulation pressure drop exergy loss Technology T
spellingShingle	R290 flow boiling numerical simulation pressure drop exergy loss Technology T Jinfeng Wang Shenglin Zhu Jing Xie Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD
description	In this paper, the impact of different factors on the flow boiling of R290 and R22 in double-concentric pipes are investigated through CFD numerical simulations. The numerical studies are performed by changing the inner tube diameter in the range of 3 to 7 mm, the refrigerant velocity between 1 and 5 m/s, the water velocity between 1 and 10 m/s and the saturation temperature in the range of 276 to 283 K. The heat transfer coefficient (HTC), pressure drop and exergy destruction of R290 are determined. The results show that HTC, pressure drop and exergy destruction are significantly impacted by the pipe diameter and the refrigerant velocity, but slightly impacted by water velocity and saturation temperature. Moreover, the exergy loss and pressure drop of R290 are 11.8–13.3% and 4.3–10.2% lower than those of R22. R290 has a lower energy loss than R22 in the evaporation process in the double-concentric pipe. However, the HTC of R290 is 57.3–59.7% lower than that of R22. The HTC of R290 can be optimized by increasing the pipe diameter or the R290 velocity.
format	article
author	Jinfeng Wang Shenglin Zhu Jing Xie
author_facet	Jinfeng Wang Shenglin Zhu Jing Xie
author_sort	Jinfeng Wang
title	Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD
title_short	Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD
title_full	Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD
title_fullStr	Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD
title_full_unstemmed	Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD
title_sort	investigation of r290 flow boiling heat transfer and exergy loss in a double-concentric pipe based on cfd
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f0df3c8e40e140d39949c0b17f0be451
work_keys_str_mv	AT jinfengwang investigationofr290flowboilingheattransferandexergylossinadoubleconcentricpipebasedoncfd AT shenglinzhu investigationofr290flowboilingheattransferandexergylossinadoubleconcentricpipebasedoncfd AT jingxie investigationofr290flowboilingheattransferandexergylossinadoubleconcentricpipebasedoncfd
_version_	1718432893461594112

Investigation of R290 Flow Boiling Heat Transfer and Exergy Loss in a Double-Concentric Pipe Based on CFD

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