Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq

The present study involves experimental analysis of the modified Closed Wet Cooling Tower (CWCT) based on first and second law of thermodynamics, to gain a deeper knowledge in this important field of engineering in Iraq. For this purpose, a prototype of CWCT optimized by added packing under a heat...

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Autores principales:	Qasim Saleh Mahdi, Hayder Mohammad Jaffal
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	Closed Wet Cooling Tower (CWCT) exergy packing thermal performance Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/1b2519919e9c46148277789f7e662604
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id	oai:doaj.org-article:1b2519919e9c46148277789f7e662604
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spelling	oai:doaj.org-article:1b2519919e9c46148277789f7e6626042021-12-02T05:52:07ZEnergy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq1818-11712312-0789https://doaj.org/article/1b2519919e9c46148277789f7e6626042017-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/296https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 The present study involves experimental analysis of the modified Closed Wet Cooling Tower (CWCT) based on first and second law of thermodynamics, to gain a deeper knowledge in this important field of engineering in Iraq. For this purpose, a prototype of CWCT optimized by added packing under a heat exchanger was designed, manufactured and tested for cooling capacity of 9 kW. Experiments are conducted to explore the effects of various operational and conformational parameters on the towers thermal performance. In the test section, spray water temperature and both dry bulb temperature and relative humidity of air measured at intermediate points of the heat exchanger and packing. Exergy of water and air were calculated by applying the exergy destruction method on the cooling tower. Experimental results showed a significant performance improvement when using packing on the CWCT. It can be observed that the thermal efficiency for the CWCT with packing under a heat exchanger and CWCT with packing above the heat exchanger are approximately 40% and 25% higher than that of the CWCT without packing respectively. As another part of the experiment results, it is indicated that the exergy destruction is directly proportional to air flow rate, cooling water flow rate, inlet cooling water flow rate and inlet Air Wet Bulb Temperature (AWBT) whereas, it is inversely proportional with spray water flow rate. In comparison with the cooling capacity of the tower, it was found that the exergy destruction approximately less than 20%. Exergy efficiency behavior is inversely proportional with the behavior of the exergy destruction. Empirical correlations are obtained to predict water film heat transfer coefficient and air-water mass transfer coefficient considering the influences of operational parameters. Qasim Saleh MahdiHayder Mohammad JaffalAl-Khwarizmi College of Engineering – University of BaghdadarticleClosed Wet Cooling Tower (CWCT)exergypackingthermal performanceChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 12, Iss 2 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Closed Wet Cooling Tower (CWCT) exergy packing thermal performance Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Closed Wet Cooling Tower (CWCT) exergy packing thermal performance Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Qasim Saleh Mahdi Hayder Mohammad Jaffal Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq
description	The present study involves experimental analysis of the modified Closed Wet Cooling Tower (CWCT) based on first and second law of thermodynamics, to gain a deeper knowledge in this important field of engineering in Iraq. For this purpose, a prototype of CWCT optimized by added packing under a heat exchanger was designed, manufactured and tested for cooling capacity of 9 kW. Experiments are conducted to explore the effects of various operational and conformational parameters on the towers thermal performance. In the test section, spray water temperature and both dry bulb temperature and relative humidity of air measured at intermediate points of the heat exchanger and packing. Exergy of water and air were calculated by applying the exergy destruction method on the cooling tower. Experimental results showed a significant performance improvement when using packing on the CWCT. It can be observed that the thermal efficiency for the CWCT with packing under a heat exchanger and CWCT with packing above the heat exchanger are approximately 40% and 25% higher than that of the CWCT without packing respectively. As another part of the experiment results, it is indicated that the exergy destruction is directly proportional to air flow rate, cooling water flow rate, inlet cooling water flow rate and inlet Air Wet Bulb Temperature (AWBT) whereas, it is inversely proportional with spray water flow rate. In comparison with the cooling capacity of the tower, it was found that the exergy destruction approximately less than 20%. Exergy efficiency behavior is inversely proportional with the behavior of the exergy destruction. Empirical correlations are obtained to predict water film heat transfer coefficient and air-water mass transfer coefficient considering the influences of operational parameters.
format	article
author	Qasim Saleh Mahdi Hayder Mohammad Jaffal
author_facet	Qasim Saleh Mahdi Hayder Mohammad Jaffal
author_sort	Qasim Saleh Mahdi
title	Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq
title_short	Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq
title_full	Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq
title_fullStr	Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq
title_full_unstemmed	Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq
title_sort	energy and exergy analysis on modified closed wet cooling tower in iraq
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2017
url	https://doaj.org/article/1b2519919e9c46148277789f7e662604
work_keys_str_mv	AT qasimsalehmahdi energyandexergyanalysisonmodifiedclosedwetcoolingtoweriniraq AT haydermohammadjaffal energyandexergyanalysisonmodifiedclosedwetcoolingtoweriniraq
_version_	1718400156320137216

Energy and Exergy Analysis on Modified Closed Wet Cooling Tower in Iraq

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