First and second law investigation of waste heat based combined power and ejector-absorption refrigeration cycle

In the proposed cogeneration cycle, a LiBr–H2O absorption refrigeration system is employed to the combined power and ejector refrigeration system which uses R141b as a working fluid. Estimates for irreversibilities of individual components of the cycle lead to possible measures for performance improvement. Results of exergy distribution of waste heat in the cycle show that around 53.6% of the total input exergy is destroyed due to irreversibilities in the components, 22.7% is available as a useful exergy output, and 23.7% is exhaust exergy lost to the environment, whereas energy distribution shows 44% is exhaust energy and 19.7% is useful energy output. Results also show that proposed cogeneration cycle yields much better thermal and exergy efficiencies than the previously investigated combined power and ejector cooling cycle. Current investigation clearly show that the second law analysis is quantitatively visualizes losses within a cycle and gives clear trends for optimization.

[1]  Bin-Juine Huang,et al.  A 1-D analysis of ejector performance , 1999 .

[2]  D. Yogi Goswami,et al.  Solar Thermal Power Technology: Present Status and Ideas for the Future , 1998, Successfully Managing the Risk and Development of Your Business and Technology.

[3]  Rafet Yapici,et al.  Performance characteristics of the ejector refrigeration system based on the constant area ejector flow model , 2005 .

[4]  Yiping Dai,et al.  Parametric analysis and optimization for a combined power and refrigeration cycle , 2008 .

[5]  Rafet Yapici,et al.  Experimental study on ejector refrigeration system powered by low grade heat , 2007 .

[6]  Yiping Dai,et al.  Exergy analysis, parametric analysis and optimization for a novel combined power and ejector refrigeration cycle , 2009 .

[7]  Masud Behnia,et al.  Investigation and improvement of ejector refrigeration system using computational fluid dynamics technique , 2007 .

[8]  Noam Lior,et al.  A Novel Ammonia-Water Cycle for Power and Refrigeration Cogeneration , 2004 .

[9]  Eckhard A. Groll,et al.  Transcritical CO2 refrigeration cycle with ejector-expansion device , 2005 .

[10]  M Ouzzane,et al.  Model development and numerical procedure for detailed ejector analysis and design , 2003 .

[11]  A. Mani,et al.  Experimental investigations on ejector refrigeration system with ammonia , 2007 .

[12]  Kim Choon Ng,et al.  Improved thermodynamic property fields of LiBr-H2O solution , 2000 .

[13]  Mark O. McLinden,et al.  NIST Thermodynamic and Transport Properties of Refrigerants and Refrigerant Mixtures-REFPROP , 1998 .

[14]  D. Goswami,et al.  A combined power/cooling cycle , 2000 .

[15]  S. Klein,et al.  NIST Standard Reference Database 23: NIST Thermodynamic and Transport Properties of Refrigerants and Refrigerant Mixtures-REFPROP, Version 6.0 | NIST , 1998 .

[16]  J. Keenan,et al.  An Investigation of Ejector Design by Analysis and Experiment , 1950 .

[17]  Ibrahim Dincer,et al.  Exergy Analysis of an Industrial Waste Heat Recovery Based Cogeneration Cycle for Combined Production of Power and Refrigeration , 2009 .

[18]  G. K. Alexis,et al.  Performance parameters for the design of a combined refrigeration and electrical power cogeneration system , 2007 .

[19]  A. Bejan.  Fundamentals of exergy analysis, entropy generation minimization, and the generation of flow architecture , 2002 .

[20]  A. Hasan,et al.  First and second law analysis of a new power and refrigeration thermodynamic cycle using a solar heat source , 2002 .