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[9000473.] رقم البحث : 9000473 - |
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Study on the parameters affecting the performance of adsorption cooling system / |
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قطاع الدراسات الهندسية / الهندسه الميكانيكيه |
| تخصص البحث : الهندسه الميكانيكيه |
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Engineering Research Journal \ |
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علي رحيم السيد الغلبان ( aaghalban@yahoo.com - 01069915417 ) |
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Silica gel; Adsorber; COMSOL Multiphysics®; Porous medium; Cooling system |
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This paper presents numerical simulation of a silica gel/water adsorption refrigeration system. The commercial COMSOL Multiphasics® code is used for simulation which employs the finite element multi-dimensional model for heat and mass transfer processes. The simulation has been carried out for rectangular tube adsorber. The proposed model is validated against available experimental data in the literature. The effects of cycle time, heating temperature, cooling temperature, contact coefficient of heat transfer between grains and heat exchange’s surface, evaporator temperature, grain size and adsorbing/desorbing bed layer thickness on the system performance were investigated. The results show that both3-D and 2-D modeling for section of the bed lead to predicting the performance of the entire bed with a good accuracy. One of the main results of this study is that the layer thickness which gives optimal coefficient of performance (COP) doesn’t depend on grain size. Moreover the results show that both of COP and specific cooling power (SCP) increase by decreasing grain size. |
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