Volume 14, Issue 2 (5-2014)                   Modares Mechanical Engineering 2014, 14(2): 70-78 | Back to browse issues page

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Talebian H, Mamourian M, Niazmand H. Exergy Analysis of the Adsorbent Bed in adsorption chillers. Modares Mechanical Engineering 2014; 14 (2) :70-78
URL: http://mme.modares.ac.ir/article-15-8117-en.html
Exergy Analysis of the Adsorbent Bed in adsorption chillers
Hoda Talebian1 , Mojtaba Mamourian2 , Hamid Niazmand * 3
1- Ferdowsi university of Mashhad
2- Assistant Professor/ Ferdowsi university of Mashhad
3- Professor / Ferdowsi universiy of mashhad
Abstract:   (5973 Views)
As the coefficient of performance and the cooling power of adsorption chillers are low, the irreversibility calculation can identify the sources which limit the increase of performance parameters and effectively be used in association with current performance improvement techniques. Adopting the numerical modeling and calculating the temporal distribution of temperature in adsorber elements, this study measures the exergy destruction in different parts and processes of the adsorbent bed. The results show the maximum exergy destruction rate in isosteric phases, yet the total exergy destruction is low due to the short phase times. The highest total exergy loss is observed in isobaric heating phase due to the high irreversibility of desorption process and also long phase duration. Furthermore the effects of fin height and fin spacing on the exergy destruction of adsorbent bed are investigated. The results show that increasing fin height and fin spacing increase the total exergy destruction; however the dependency of fin spacing on exergy destruction is relatively low.
Keywords: Adsorption chiller, Exergy Destruction, Numerical Modeling, coefficient of performance, Cooling Power
Full-Text [PDF 508 kb]   (6605 Downloads)    
Article Type: Research Article | Subject: Heat & Mass Transfer|Plumbing & Air Conditioning|Thermodynamics
Received: 2013/02/16 | Accepted: 2013/07/12 | Published: 2014/04/20
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