Energy Analysis of LiBr-Water Single Effect Absorption Refrigeration System : Effect of Operating Conditions on System Performance

Authors

  • Sandeep S. Chevli  Assistant Professor in Government Engineering College, Bhuj, Gujarat, India
  • Dimple Gandhi  Assistant Professor in Government Engineering College, Valsad, Gujarat, India
  • Milli Hota  Assistant Professor in Government Engineering College, Surat, Gujarat, India

Keywords:

Refrigeration, Absorption, Lithium Bromide-Water, Single Effect

Abstract

Energy based thermodynamic analysis and parametric study of the LiBr-Water single effect vapour absorption refrigeration system for 1 TR capacity is performed for 10oC evaporator, 35oC condenser and 40oC absorber temperature. The effect of operating temperatures on heat loads of all heat exchanger and Circulation Ratio (CR) of system are investigated. Operating temperatures effect on system Co-efficient of Performance (COP), Carnot COP and efficiency ratio has also been analysed. It is observed that the thermal load of generator and absorber is strongly influenced by CR of the system. It is concluded that thermal load of generator and absorber decreases with increase of temperature of generator and evaporator, whereas they increases with increase of absorber and condenser temperatures. System COP increases with rise in generator temperature up to optimum value. Maximum COP of the system is 0.7825 is obtained with optimum generator temperature of 85.3oC. Increase in system COP is observed with enhance of solution heat exchanger effectiveness. Further, Sensitivity analysis has been conducted to study the effect of generator temperature on COP for different values of operating temperatures of evaporator condenser and absorber.

References

  1. Darwish,N.,Al-Hashimi,S.,Al-Mansoori,A.,2008. Performance analysis and evaluation of a commercial absorption–refrigeration water–ammonia. International Journal of refrigeration.31, 1214-1223 
  2. Fernández-Seara,J., Sieres,J., Vázquez,M.,2003. Heat and mass transfer analysis of a helical coil rectifier in an ammonia–water absorption system. International Journal of Thermal Sciences. 42,783–794
  3. WenSun,D.,1998.Comparision of performances of NH3-H2O, NH3-LiNO3 and NH3-NaSCN absorption refrigeration systems. Energy conservation and mangaemnet.39, 357-368
  4. Colonna,P.,Gabrielli,S.,2003.Industrial trigeneration using ammonia-water absorption refrigeration systems. Applied Thermal Engineering.23, 381–396
  5. Horuz,I.,1998.A Comparison between ammonia-water and water-lithium bromide in vapour absorption refrigeration system. International Journal of Heat and mass transfer.25,711-721
  6. Mostafavi,M.,Agnew,B.,1996.The effect of ambient temperature on the surface area of components of an air-cooled lithium bromide-water absorption unit. Applied Thermal Engineering.16(4),313-319
  7. Mostafavi,M.,Agnew,B.,1996.The impact of ambient temperature on lithium bromide-water absorption machine performance. Applied Thermal Engineering.16(6),515-522
  8. Liao,X. & Radermacher, R.,2007. Absorption Chiller crystallization control strategies for integrated cooling heating and power systems. International journal of Refrigeration . 30, 904-911.
  9. Saravanan,R., and Maiya,M.P.,1998. Thermodynamic Comparison of water based working fluid combinations for vapour absorption refrigeration system. Applied Thermal Engineering. 18(7) ,553-568
  10. Romero,R.,Rivera,W.,Gracia,J.,Best.2001. Thoeritical comparison of performance of absorption heat pump for cooling and heating operating with aqueous ternary hydroxide and water lithium bromide.Applied thermal engg.21.,1137-1147
  11. Romero,R.,Rivera,W.,Best,R.2000.Comparision of theoretical performance of solar air conditioning system operating with water/lithium bromide and aqueous ternary hydroxide. Solar Energy Materials and Solar Cells. 63,387-399.
  12. Srikhirin,P., Aphornratana, S., & Chungpaibulpatana, S.,2001. A review of absorption refrigeration technologie. Renewable and sustainable energy reviews. 5, 343-372.
  13. Kaynakli,O. & Kilic, M.,2007. Theoretical study on the effect of operating conditions on performance of absorption refrigeration system. Energy conversionand Management. 48 , 599–607
  14. Sencana, A., Yakut, K.A. & Kalogirou, S.A.,2005. Exergy analysis of lithium bromide/water absorption systems. Renewable Energy. 30 , 645–657.
  15. Kilic,M. & Kaynakli.,O. ,2007. Second law-based thermodynamic analysis of water-lithium bromide absorption refrigeration system.Energy.32, 1505–1512
  16. Kaushik, S.C., & Arora,A.,2009. Energy and exergy analysis of single effect and series flow double effect water–lithium bromide absorption refrigeration systems. International Journal of Refrigeration. 32,1247-1258
  17. Gomri,R.,2009. Second law comparison of single effect and double effect vapour absorption refrigeration systems. Energy Conservation and Management. 50,1279–1287

International Journal of Scientific Research in Science and Technology

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Published

2019-02-25

Issue

Volume 6, Issue 1, January-February-2019

Section

Research Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
Sandeep S. Chevli, Dimple Gandhi, Milli Hota, " Energy Analysis of LiBr-Water Single Effect Absorption Refrigeration System : Effect of Operating Conditions on System Performance, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 6, Issue 1, pp.778-786, January-February-2019.