CFD analysis of evaporation heat transfer for falling films application

Multi-effect desalination (MED) uses less energy and has a smaller footprint than other thermal desalination systems. The MED plant consists of cascaded horizontal-tube falling film exchangers (HFFE), offering improved heat transfer at lower liquid loads. The MED plant’s current working temperature...

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Autores principales:	Furqan Tahir, Sami G. Al-Ghamdi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	CFD Desalination Evaporation Falling film Heat transfer coefficient Horizontal tube Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/756b9c2998704a1089c08f1ac6320834
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spelling	oai:doaj.org-article:756b9c2998704a1089c08f1ac63208342021-12-04T04:34:59ZCFD analysis of evaporation heat transfer for falling films application2352-484710.1016/j.egyr.2021.11.096https://doaj.org/article/756b9c2998704a1089c08f1ac63208342022-04-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721012415https://doaj.org/toc/2352-4847Multi-effect desalination (MED) uses less energy and has a smaller footprint than other thermal desalination systems. The MED plant consists of cascaded horizontal-tube falling film exchangers (HFFE), offering improved heat transfer at lower liquid loads. The MED plant’s current working temperature range is 40 °C–65 °C, for which 6–8 HFFE can be used. However, this limit can be extended to 5 °C–85 °C by using new antiscalants and an adsorption vapor compression system. Thus, more HFFE can provide enhanced water production. Furthermore, the heat transfer studies for this range are limited. Therefore, this work presents a 2-D computational fluid dynamics (CFD) model in Ansys fluent v19.0 to examine the film thickness, the temperature distribution, and the heat transfer coefficient for working temperatures of 5 °C, 65 °C, and 85 °C at various liquid loads. It is found that the heat transfer is improved at higher temperatures and liquid loads by 21 %–37 %, which indicates lower energy requirements and better distillate productivity.Furqan TahirSami G. Al-GhamdiElsevierarticleCFDDesalinationEvaporationFalling filmHeat transfer coefficientHorizontal tubeElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 8, Iss , Pp 216-223 (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	CFD Desalination Evaporation Falling film Heat transfer coefficient Horizontal tube Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	CFD Desalination Evaporation Falling film Heat transfer coefficient Horizontal tube Electrical engineering. Electronics. Nuclear engineering TK1-9971 Furqan Tahir Sami G. Al-Ghamdi CFD analysis of evaporation heat transfer for falling films application
description	Multi-effect desalination (MED) uses less energy and has a smaller footprint than other thermal desalination systems. The MED plant consists of cascaded horizontal-tube falling film exchangers (HFFE), offering improved heat transfer at lower liquid loads. The MED plant’s current working temperature range is 40 °C–65 °C, for which 6–8 HFFE can be used. However, this limit can be extended to 5 °C–85 °C by using new antiscalants and an adsorption vapor compression system. Thus, more HFFE can provide enhanced water production. Furthermore, the heat transfer studies for this range are limited. Therefore, this work presents a 2-D computational fluid dynamics (CFD) model in Ansys fluent v19.0 to examine the film thickness, the temperature distribution, and the heat transfer coefficient for working temperatures of 5 °C, 65 °C, and 85 °C at various liquid loads. It is found that the heat transfer is improved at higher temperatures and liquid loads by 21 %–37 %, which indicates lower energy requirements and better distillate productivity.
format	article
author	Furqan Tahir Sami G. Al-Ghamdi
author_facet	Furqan Tahir Sami G. Al-Ghamdi
author_sort	Furqan Tahir
title	CFD analysis of evaporation heat transfer for falling films application
title_short	CFD analysis of evaporation heat transfer for falling films application
title_full	CFD analysis of evaporation heat transfer for falling films application
title_fullStr	CFD analysis of evaporation heat transfer for falling films application
title_full_unstemmed	CFD analysis of evaporation heat transfer for falling films application
title_sort	cfd analysis of evaporation heat transfer for falling films application
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/756b9c2998704a1089c08f1ac6320834
work_keys_str_mv	AT furqantahir cfdanalysisofevaporationheattransferforfallingfilmsapplication AT samigalghamdi cfdanalysisofevaporationheattransferforfallingfilmsapplication
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CFD analysis of evaporation heat transfer for falling films application

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