Hourly Performance Prediction of Solar Ejector-Absorption Refrigeration Based on Exergy and Exergoeconomic Concept

Abstract

Solar cooling technology is being increasingly studied due to its environmental compatibility and cost saving capability. In this article, application of solar absorption refrigeration for cooling of an office building is investigated through modeling and simulation. Solar radiation and cooling load demand have hourly modeled during summer days using Tehran’s climate data as a typical weather scenario. The simulation results show that from 9 AM to 5 PM, product cost per exergy unit (cP,tot) for the entire system decreases 87%. During this time, thermodynamic coefficient of performance (COPth) increases from 0.16 to 0.48 (auxiliary heat needed reduces from 4.36 to 1.23 kW), suggesting that the performance of the system increases until 5 PM. This is also confirmed by studying exergetic coefficient of performance (COPexe) which reaches to the maximum point at the same time. Furthermore summer days analysis shows that at maximum air temperature the system has optimal COPs while the minimum of cP,tot occurs at maximum radiation. The results show the exact times at which the system performs less efficiently by solar energy and therefore the opportunity of using other available renewable energy resources at these times.

Keywords

• Solar energy; Absorption refrigeration; Modeling and Simulation; Ammonia-water; Thermoeconomic analysis; Building energy

Kaynakça

1. S. A. Kalogirou, Solar Energy Engineering: Processes and Systems: Elsevier Science, 2009.
2. D. W. Sun, I. W. Eames, and S. Aphornratana, "Evaluation of a novel combined ejector-absorption refrigeration cycle - I: computer simulation," International Journal of Refrigeration, vol. 19, pp. 172- 180, 1996.
3. S. G. Alvares and C. Trepp, "Simulation of a solar driven aqua-ammonia absorption refrigeration system Part 1: mathematical description and system optimization," International Journal of Refrigeration, vol. 10, pp. 40-48, 1987.
4. N. K. Ghaddar, M. Shihab, and F. Bdeir, "Modeling and simulation of solar absorption system performance in Beirut," Renewable Energy, vol. 10, pp. 539-558, 1997.
5. I. Atmaca and A. Yigit, "Simulation of solar-powered absorption cooling system," Renewable Energy, vol. 28, pp. 1277-1293, 2003.
6. M. Mazloumi, M. Naghashzadegan, and K. Javaherdeh, "Simulation of solar lithium bromide–water absorption cooling system with parabolic trough collector," Energy Conversion and Management, vol. 49, pp. 2820-2832, 2008.
7. M. Ozgoren, M. Bilgili, and O. Babayigit, "Hourly performance prediction of ammonia–water solar absorption refrigeration," Applied Thermal Engineering, vol. 40, pp. 80-90, 2012.
8. F. Assilzadeh, S. A. Kalogirou, Y. Ali, and K. Sopian, "Simulation and optimization of a LiBr solar absorption cooling system with evacuated tube collectors," Renewable Energy, vol. 30, pp. 1143-1159, 2005.

9. A. Sözen and M. Özalp, "Solar-driven ejector-absorption cooling system," Applied Energy, vol. 80, pp. 97-113, 2005.
10. S. Aphornratana and I. W. Eames, "Experimental investigation refrigerator: Aphornratana, S. and Eames, I. W. Int. J. Energy Res., 1998, 22, (3), 195–207," Fuel and Energy Abstracts, vol. 39, p. 305, 1998. ejector-absorption
11. L. Garousi Farshi, S. M. S. Mahmoudi, and M. A. Rosen, "Exergoeconomic comparison of double effect and refrigeration systems," Applied Energy, vol. 103, pp. 700-711, 2013. effect absorption
12. R. D. Misra, P. K. Sahoo, S. Sahoo, and A. Gupta, "Thermoeconomic optimization of a single effect water/LiBr vapour absorption refrigeration system," International Journal of Refrigeration, vol. 26, pp. 158- 169, 2003.
13. V. Zare, S. M. S. Mahmoudi, M. Yari, and M. Amidpour, "Thermoeconomic analysis and optimization of an ammonia–water power/cooling cogeneration cycle," Energy, vol. 47, pp. 271-283, 2012.
14. B. H. Gebreslassie, G. Guillén-Gosálbez, L. Jiménez, and D. Boer, "Design of environmentally conscious absorption optimization and life cycle assessment," Applied Energy, systems vol. 86, pp. 1712-1722, 2009. via multi-objective
15. R. Sirwan, M. A. Alghoul, K. Sopian, and Y. Ali, "Thermodynamic analysis of an ejector-flash tank- absorption Engineering, vol. 58, pp. 85-97, 2013. system," Applied Thermal
16. S. Klein and F. Alvarado. Engineering equation solver. Http://Www.Fchart.Com
17. Y. A. Çengel and M. A. Boles, Thermodynamics: an engineering approach: McGraw-Hill Higher Education, 2006.
18. A. Bejan, G. Tsatsaronis, and M. J. Moran, Thermal Design and Optimization: Wiley, 1996.
19. L. J. He, L. M. Tang, and G. M. Chen, "Performance prediction of refrigerant-DMF solutions in a single-stage solar-powered absorption refrigeration system at low generating temperatures," Solar Energy, vol. 83, pp. 2029-2038, 2009.
20. M. Wang, J. Wang, Y. Zhao, P. Zhao, and Y. Dai, "Thermodynamic analysis and optimization of a solar- driven regenerative organic Rankine cycle (ORC) based on flat-plate solar collectors," Applied Thermal Engineering, vol. 50, pp. 816-825, 2013.
21. A. Pongtornkulpanich, S. Thepa, M. Amornkitbamrung, and C. Butcher, "Experience with fully operational solar- driven 10-ton LiBr/H2O single-effect absorption cooling system in Thailand," Renewable Energy, vol. 33, pp. 943- 949, 2008.
22. http://www.Apricus.Com.Au product specification sheet. (2013).
23. R. D. Misra, P. K. Sahoo, and A. Gupta, "Thermoeconomic evaluation and optimization of an aqua-ammonia vapour-absorption refrigeration system," International Journal of Refrigeration, vol. 29, pp. 47-59, 2006.
24. T. J. Kotas, The Exergy Method of Thermal Plant Analysis: Krieger Publishing Company, 1995.
25. C. A. Frangopoulos and U. Staff, Exergy, Energy System Analysis and Optimization: EOLSS Publishers Company Limited, 2009.
26. F. A. Al-Sulaiman, I. Dincer, and F. Hamdullahpur, "Exergy modeling of a new solar driven trigeneration system," Solar Energy, vol. 85, pp. 2228-2243, 2011.
27. V. Zare, S. M. S. Mahmoudi, and M. Yari, "An exergoeconomic investigation of waste heat recovery from the Gas Turbine-Modular Helium Reactor (GT- MHR) employing an ammonia–water power/cooling cycle," Energy, vol. 61, pp. 397-409, 2013.
28. F. Kreith, CRC Handbook of Thermal Engineering: Taylor & Francis, 2000.
29. Https://eosweb.larc.nasa.gov. (2013).
30. F. C. McQuiston, J. D. Parker, and J. D. Spitler, Heating, ventilating, and air conditioning: analysis and design: John Wiley & Sons, 2005.
31. J. Abdulateef, M. Alghoul, A. Zaharim, and K. Sopian, "Experimental Investigation on Solar Absorption Refrigeration System in Malaysia," in Proceedings of the 3rd Wseas Int. Conf. On Renewable Energy Sources, 2009, pp. 1-3.
32. B. H. Gebreslassie, G. Guillén-Gosálbez, L. Jiménez, and D. Boer, "Solar assisted absorption cooling cycles for reduction of global warming: A multi-objective optimization approach," Solar Energy, vol. 86, pp. 2083- 2094, 2012.
33. "Economic Indicators, Chemical engineering plant Cost Index (CEPCI)," Chemical engineering, September 2013.