Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System

Performance of the absorption cooling system is still a challenge due to the coefficient of performance (COP) that is generally poor when compared with the conventional vapor compression cycle. High solar radiation in hot climates is usually associated with high ambient temperature and consequently...

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Main Authors: Sirwan, Ranj, Alghoul, M.A., Sopian, K., Yusoff, Ali, Jasim, Abdulateef
Format: Article
Language:English
English
Published: Elsevier Ltd 2013
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Online Access:http://umpir.ump.edu.my/id/eprint/6593/1/Evaluation%20of%20Adding%20Flash%20Tank%20to%20Solar%20Combined%20Ejector%E2%80%93Absorption%20Refrigeration%20System.pdf
http://umpir.ump.edu.my/id/eprint/6593/7/Evaluation%20of%20Adding%20Flash%20Tank%20to%20Solar%20Combined%20.pdf
http://umpir.ump.edu.my/id/eprint/6593/
http://dx.doi.org/10.1016/j.solener.2013.01.018
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spelling my.ump.umpir.65932016-05-10T03:02:45Z http://umpir.ump.edu.my/id/eprint/6593/ Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System Sirwan, Ranj Alghoul, M.A. Sopian, K. Yusoff, Ali Jasim, Abdulateef TJ Mechanical engineering and machinery Performance of the absorption cooling system is still a challenge due to the coefficient of performance (COP) that is generally poor when compared with the conventional vapor compression cycle. High solar radiation in hot climates is usually associated with high ambient temperature and consequently peak cooling demand. Absorption cooling cycles can be powered by solar but the performance is limited by heat source temperature (solar collector) and high ambient temperature that can affect the condensation process. Efficiency enhancement of the system components is essential to increase the COP of the system. A modification in the combined absorption–ejector cooling system is adopted. Adding a removable flash tank between the condenser and evaporator could improve entrainment ratio of the ejector, along with improving the cooling effect inside the evaporator. A computer simulation program is developed to evaluate the performance of the modified combined cycle using aqua-ammonia (NH3–H2O) refrigerant. The performance of the proposed combined cooling cycle is compared with basic absorption, and combined absorption–ejector cooling cycles. Results showed a significant improvement in the COP of the modified cycle at different operating conditions. Cooling effect and capacity of the evaporator is enhanced due to the reduction of flash gas delivered to the evaporator. Furthermore, the flash tank optimized the ejector entertainment ratio and consequently increasing the condenser pressure. This optimization will enable the system to perform well in hot climates where the condenser efficiency is limited by ambient temperature. Elsevier Ltd 2013 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/6593/1/Evaluation%20of%20Adding%20Flash%20Tank%20to%20Solar%20Combined%20Ejector%E2%80%93Absorption%20Refrigeration%20System.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/6593/7/Evaluation%20of%20Adding%20Flash%20Tank%20to%20Solar%20Combined%20.pdf Sirwan, Ranj and Alghoul, M.A. and Sopian, K. and Yusoff, Ali and Jasim, Abdulateef (2013) Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System. Solar Energy, 91. pp. 283-296. ISSN 0038-092X http://dx.doi.org/10.1016/j.solener.2013.01.018 DOI: 10.1016/j.solener.2013.01.018
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Sirwan, Ranj
Alghoul, M.A.
Sopian, K.
Yusoff, Ali
Jasim, Abdulateef
Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System
description Performance of the absorption cooling system is still a challenge due to the coefficient of performance (COP) that is generally poor when compared with the conventional vapor compression cycle. High solar radiation in hot climates is usually associated with high ambient temperature and consequently peak cooling demand. Absorption cooling cycles can be powered by solar but the performance is limited by heat source temperature (solar collector) and high ambient temperature that can affect the condensation process. Efficiency enhancement of the system components is essential to increase the COP of the system. A modification in the combined absorption–ejector cooling system is adopted. Adding a removable flash tank between the condenser and evaporator could improve entrainment ratio of the ejector, along with improving the cooling effect inside the evaporator. A computer simulation program is developed to evaluate the performance of the modified combined cycle using aqua-ammonia (NH3–H2O) refrigerant. The performance of the proposed combined cooling cycle is compared with basic absorption, and combined absorption–ejector cooling cycles. Results showed a significant improvement in the COP of the modified cycle at different operating conditions. Cooling effect and capacity of the evaporator is enhanced due to the reduction of flash gas delivered to the evaporator. Furthermore, the flash tank optimized the ejector entertainment ratio and consequently increasing the condenser pressure. This optimization will enable the system to perform well in hot climates where the condenser efficiency is limited by ambient temperature.
format Article
author Sirwan, Ranj
Alghoul, M.A.
Sopian, K.
Yusoff, Ali
Jasim, Abdulateef
author_facet Sirwan, Ranj
Alghoul, M.A.
Sopian, K.
Yusoff, Ali
Jasim, Abdulateef
author_sort Sirwan, Ranj
title Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System
title_short Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System
title_full Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System
title_fullStr Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System
title_full_unstemmed Evaluation Of Adding Flash Tank To Solar Combined Ejector–Absorption Refrigeration System
title_sort evaluation of adding flash tank to solar combined ejector–absorption refrigeration system
publisher Elsevier Ltd
publishDate 2013
url http://umpir.ump.edu.my/id/eprint/6593/1/Evaluation%20of%20Adding%20Flash%20Tank%20to%20Solar%20Combined%20Ejector%E2%80%93Absorption%20Refrigeration%20System.pdf
http://umpir.ump.edu.my/id/eprint/6593/7/Evaluation%20of%20Adding%20Flash%20Tank%20to%20Solar%20Combined%20.pdf
http://umpir.ump.edu.my/id/eprint/6593/
http://dx.doi.org/10.1016/j.solener.2013.01.018
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score 13.160551