Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions

Under dehumidifying conditions, the condensed water will directly affect the heat transfer and resistance characteristics of a fin-and-tube heat exchanger. The geometrical form of condensed water on fin surfaces of three different fin materials (i.e., copper fin, aluminum fin, and aluminum fin with...

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Autores principales:	Wan-Ling Hu, Ai-Jun Ma, Yong Guan, Zhi-Jie Cui, Yi-Bo Zhang, Jing Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	condensate droplet dehumidifying conditions fin-and-tube heat exchanger fin material Technology T
Acceso en línea:	https://doaj.org/article/eadcad592888409382e04473150ffdc3
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spelling	oai:doaj.org-article:eadcad592888409382e04473150ffdc32021-11-11T15:50:52ZExperimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions10.3390/en142170301996-1073https://doaj.org/article/eadcad592888409382e04473150ffdc32021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7030https://doaj.org/toc/1996-1073Under dehumidifying conditions, the condensed water will directly affect the heat transfer and resistance characteristics of a fin-and-tube heat exchanger. The geometrical form of condensed water on fin surfaces of three different fin materials (i.e., copper fin, aluminum fin, and aluminum fin with hydrophilic layer) in a fin-and-circular-tube heat exchanger was experimentally studied in this paper. The effect of the three different fin materials on heat transfer and friction performance of the heat exchanger was researched, too. The results show that the condensation state on the surface of copper fin and aluminum fin are dropwise condensation. The condensation state on the surface of the aluminum fin with the hydrophilic layer is film condensation. For the three different material fins, increasing the air velocity (<i>u</i><sub>a,in</sub>) and relative humidity (<i>RH</i><sub>in</sub>) of the inlet air can enhance the heat transfer of the heat exchanger. Friction factor (<i>f</i>) of the three different material fins decreases with the increase of <i>u</i><sub>a,in</sub>, however, increases with the increase of <i>RH</i><sub>in</sub>. At the same <i>u</i><sub>a,in</sub> or <i>RH</i><sub>in</sub>, Nusselt number (<i>Nu</i>) of the copper fin heat exchanger is the largest and <i>Nu</i> of the aluminum fin with hydrophilic layer is the smallest, <i>f</i> of the aluminum fin heat exchanger is the largest and <i>f</i> of the aluminum fin with hydrophilic layer is the smallest. Under the identical pumping power constrain, the comprehensive heat transfer performance of the copper fin heat exchanger is the best for the studied cases.Wan-Ling HuAi-Jun MaYong GuanZhi-Jie CuiYi-Bo ZhangJing WangMDPI AGarticlecondensate dropletdehumidifying conditionsfin-and-tube heat exchangerfin materialTechnologyTENEnergies, Vol 14, Iss 7030, p 7030 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	condensate droplet dehumidifying conditions fin-and-tube heat exchanger fin material Technology T
spellingShingle	condensate droplet dehumidifying conditions fin-and-tube heat exchanger fin material Technology T Wan-Ling Hu Ai-Jun Ma Yong Guan Zhi-Jie Cui Yi-Bo Zhang Jing Wang Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions
description	Under dehumidifying conditions, the condensed water will directly affect the heat transfer and resistance characteristics of a fin-and-tube heat exchanger. The geometrical form of condensed water on fin surfaces of three different fin materials (i.e., copper fin, aluminum fin, and aluminum fin with hydrophilic layer) in a fin-and-circular-tube heat exchanger was experimentally studied in this paper. The effect of the three different fin materials on heat transfer and friction performance of the heat exchanger was researched, too. The results show that the condensation state on the surface of copper fin and aluminum fin are dropwise condensation. The condensation state on the surface of the aluminum fin with the hydrophilic layer is film condensation. For the three different material fins, increasing the air velocity (<i>u</i><sub>a,in</sub>) and relative humidity (<i>RH</i><sub>in</sub>) of the inlet air can enhance the heat transfer of the heat exchanger. Friction factor (<i>f</i>) of the three different material fins decreases with the increase of <i>u</i><sub>a,in</sub>, however, increases with the increase of <i>RH</i><sub>in</sub>. At the same <i>u</i><sub>a,in</sub> or <i>RH</i><sub>in</sub>, Nusselt number (<i>Nu</i>) of the copper fin heat exchanger is the largest and <i>Nu</i> of the aluminum fin with hydrophilic layer is the smallest, <i>f</i> of the aluminum fin heat exchanger is the largest and <i>f</i> of the aluminum fin with hydrophilic layer is the smallest. Under the identical pumping power constrain, the comprehensive heat transfer performance of the copper fin heat exchanger is the best for the studied cases.
format	article
author	Wan-Ling Hu Ai-Jun Ma Yong Guan Zhi-Jie Cui Yi-Bo Zhang Jing Wang
author_facet	Wan-Ling Hu Ai-Jun Ma Yong Guan Zhi-Jie Cui Yi-Bo Zhang Jing Wang
author_sort	Wan-Ling Hu
title	Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions
title_short	Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions
title_full	Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions
title_fullStr	Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions
title_full_unstemmed	Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions
title_sort	experimental study of the air side performance of fin-and-tube heat exchanger with different fin material in dehumidifying conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/eadcad592888409382e04473150ffdc3
work_keys_str_mv	AT wanlinghu experimentalstudyoftheairsideperformanceoffinandtubeheatexchangerwithdifferentfinmaterialindehumidifyingconditions AT aijunma experimentalstudyoftheairsideperformanceoffinandtubeheatexchangerwithdifferentfinmaterialindehumidifyingconditions AT yongguan experimentalstudyoftheairsideperformanceoffinandtubeheatexchangerwithdifferentfinmaterialindehumidifyingconditions AT zhijiecui experimentalstudyoftheairsideperformanceoffinandtubeheatexchangerwithdifferentfinmaterialindehumidifyingconditions AT yibozhang experimentalstudyoftheairsideperformanceoffinandtubeheatexchangerwithdifferentfinmaterialindehumidifyingconditions AT jingwang experimentalstudyoftheairsideperformanceoffinandtubeheatexchangerwithdifferentfinmaterialindehumidifyingconditions
_version_	1718433416331919360

Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions

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