Theoretical analysis of LiBr/H2O absorption refrigeration systems |
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| Authors: | Akhilesh Arora S. C. Kaushik |
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| Affiliation: | 1. Department of Mechanical Engineering, Delhi College of Engineering, New Delhi 110042, India;2. Centre for Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India |
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| Abstract: | A computational model is developed for the parametric investigation of single‐effect and series flow double‐effect LiBr/H2O absorption refrigeration systems. The effects of generator, absorber, condenser, evaporator and dead state temperatures are examined on the performance of these systems. The parameters computed are coefficient of performance (COP), exergy destruction rates, thermal exergy loss rates, irreversibility and exergetic efficiency. The results indicate that COP and exergetic efficiency of both the systems increase with increase in the generator temperature. There exist different optimum values of generator temperature for maximum COP and maximum exergetic efficiency. The optimum generator temperature is lower corresponding to maximum exergetic efficiency as compared to optimum generator temperature corresponding to maximum COP. The effect of increase in absorber, condenser and evaporator temperatures is to decrease the exergetic efficiency of both the systems. The irreversibility is highest in absorber in both systems. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | exergy analysis second law of thermodynamics double‐effect series flow absorption refrigeration system LiBr/H2O |
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