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Conference Paper: Exergy analysis of cooling towers for optimization of HVAC systems

TitleExergy analysis of cooling towers for optimization of HVAC systems
冷卻塔的火用分析應用在暖通空調系統的優化
Authors
Keywordsexergy analysis
cooling towers
optimization of HVAC systems
Issue Date2011
Citation
The 2011 Hunan-Hong Kong Joint Symposium, Changsha, Hunan, China, 1-2 July 2011. In Conference Proceedings, 2011, p. 41-51 How to Cite?
AbstractExergy analysis is a useful thermodynamic technique for assessing and improving the efficiency of processes and systems. By examining the exergy destruction properties, it is possible to optimize the environmental and economic performance of the systems. This research applies exergy analysis technique to investigate and optimize the performance of evaporative cooling towers in HVAC (heating, ventilating and air conditioning) systems. The analysis is carried out in two steps. The first step considers the physical exergy of each component and process within a whole HVAC system for a typical office building. The building’s cooling load and cooling energy requirements are determined by building energy simulation software. Exergy destruction and exergy efficiency of the system are calculated from theoretical models. The result indicates that the exergy loss of cooling tower is quite significant, and the loss is affected by outdoor environment and condensing water temperature. The second step considers the chemical exergy of condensing water and outdoor air. A counter-flow wet cooling tower is investigated by experiments and theoretical models. The dry-bulb temperature and relative humidity of outdoor air are studied by an exergy approach in order to maximize the cooling tower performance. The distribution of exergy loss within the system has been shown and information to minimize exergy destruction and optimize the system efficiency can be determined.
DescriptionConference theme: Green & Sustainable Technology Development (绿色科技与可持续发展)
Persistent Identifierhttp://hdl.handle.net/10722/140387

 

DC FieldValueLanguage
dc.contributor.authorHui, SCMen_US
dc.contributor.authorWong, HYKen_US
dc.date.accessioned2011-09-23T06:10:50Z-
dc.date.available2011-09-23T06:10:50Z-
dc.date.issued2011en_US
dc.identifier.citationThe 2011 Hunan-Hong Kong Joint Symposium, Changsha, Hunan, China, 1-2 July 2011. In Conference Proceedings, 2011, p. 41-51en_US
dc.identifier.urihttp://hdl.handle.net/10722/140387-
dc.descriptionConference theme: Green & Sustainable Technology Development (绿色科技与可持续发展)-
dc.description.abstractExergy analysis is a useful thermodynamic technique for assessing and improving the efficiency of processes and systems. By examining the exergy destruction properties, it is possible to optimize the environmental and economic performance of the systems. This research applies exergy analysis technique to investigate and optimize the performance of evaporative cooling towers in HVAC (heating, ventilating and air conditioning) systems. The analysis is carried out in two steps. The first step considers the physical exergy of each component and process within a whole HVAC system for a typical office building. The building’s cooling load and cooling energy requirements are determined by building energy simulation software. Exergy destruction and exergy efficiency of the system are calculated from theoretical models. The result indicates that the exergy loss of cooling tower is quite significant, and the loss is affected by outdoor environment and condensing water temperature. The second step considers the chemical exergy of condensing water and outdoor air. A counter-flow wet cooling tower is investigated by experiments and theoretical models. The dry-bulb temperature and relative humidity of outdoor air are studied by an exergy approach in order to maximize the cooling tower performance. The distribution of exergy loss within the system has been shown and information to minimize exergy destruction and optimize the system efficiency can be determined.-
dc.languageengen_US
dc.relation.ispartofHunan-Hong Kong Joint Symposiumen_US
dc.relation.ispartof湘港建築設備工程技術交流會-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectexergy analysis-
dc.subjectcooling towers-
dc.subjectoptimization of HVAC systems-
dc.titleExergy analysis of cooling towers for optimization of HVAC systemsen_US
dc.title冷卻塔的火用分析應用在暖通空調系統的優化zh_HK
dc.typeConference_Paperen_US
dc.identifier.emailHui, SCM: cmhui@hku.hken_US
dc.identifier.authorityHui, SCM=rp00121en_US
dc.description.naturepostprint-
dc.identifier.hkuros196441en_US
dc.identifier.spage41en_US
dc.identifier.epage51en_US

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