Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2012.2580.2585Mohammed Salih AhmedMojahid Sid Ahmed Ihtsham Ul-Haq GilaniSyed 1220121224Exergy analysis of a double-effect parallel flow commercial
absorption chiller is presented in this study. Generally a major obstacle for
developing model of a commercial absorption chiller is lack of available component
specifications. These specifications are commonly proprietary of the chillers
manufacturers and normally the available information is not sufficient. This
study presented a double-effect parallel-flow-type steam absorption chiller
model based on mass and energy equations. The chiller studied is 1250 RT (Refrigeration
Tons) using lithium bromide-water solution as working pair. For refrigerant
and absorbent properties, set of efficient formulations are used. The model
gives the required information about temperature, concentration, entropy, exergy
and flow rate at each state point of the system. The model calculates the heat
load at each component as well as the performance of the system. The profile
of the exergy destructions for various components is plotted against the heat
load in the range of 20-100% of cooling capacity. The results showed that the
high temperature generator has the greatest exergy destruction followed by the
absorber and high temperature solution heat exchanger. Further, it was found
that the Coefficient of Performance (COP) increased with increasing with load
factor. However, the exergetic efficiency was found to decrease while increasing
the load factor.]]>Ahmed, M.S.A.M.S. and S.I. Ul-Haq Gilani,2011Chua, H.T., H.K. Toh, A. Malek, K.C. Ng and K. Srinivasan,2000Gebreslassie, B.H., M. Medrano and D. Boer,2010Gomri, R.,2010Gordon, J. and K.C. Ng,2000Herold, K.E., R. Radermacher and S.A. Klein,1996Kaushik, S. and A. Arora,2009Kilic, M. and O. Kaynakli,2007Kreith, F. and D.Y. Goswami,2007Sencan, A., K.A. Yakut and S.A. Kalogirou,2005Talbi, M.M. and B. Agnew,2000