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81 47 4 1396 "#$ 209 - 218 * : [email protected] : ! 17 / 12 / 93 :() ! 13 / 08 / 94 (") *+,-. / *+0. 102 34 560) / 07. ) 34 805) *9 :;" */< ;. 8/03 =;> 3? *01@ A -./ 0 1/ 23 4556 7 8 /8 - -./ 9/ : ;< B3? C80 0-6 *B9 * - -./ 9/ : ;< -./ 0 1/ 23 4556 7 / EF G< / 27 -= 0 .8 /= > - -= 9/ : ;< 2 5 ? 237> 23 @A B)C D E B)C 2F GH6 : I ./ 8 KL HH6 4M B C @A N F 7 K 4O1 PB Q0 4O1 EES /6 (E K S -T > :) 237> 23 GH6 B C@ HM0 V F 2B @A D E B)C @A ?B C) C B)C ;A DW ?X.F ./ 8 @ (/ > T 3 Y 2 4Z 237> :B 237> [9 H.\ ]^ 2) <>:B -7 B 3 @A ./ > /B 8 2F H.\ ]^ (- ;A Y 2) - P8 2B 8 _09 @A B)C B C @A B)C B D E : < 30 -< ‘7 M ? 237> :B 2;.<A 4a F @A . C QF B +./ *9 *6 : @A D E B)C @A H.\ ]^ 237> 23 C B)C . Energy and Exergy Analysis of Single Effect Absorption and Combined Ejector- Absorption Refrigeration include Aqueous Lithium Bromide Solution Energy and Sustainable Development Research Center, Semnan Branch, Islamic Azad University, Semnan, Iran S. R. Fakheri Energy and Sustainable Development Research Center, Semnan Branch, Islamic Azad University, Semnan, Iran H. Kargarsharifabad Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran H. Sakhaeinia Abstract In this paper, the energy and exergy of single effect absorption and combined ejector-absorption refrigeration cycles are carried out analytically. Having analyzed the cycles and presented the governing equations with their expansion in EES software, we analyze the energy and exergy (from the viewpoint of the first and second law of thermodynamics) of both single effect absorption and combined ejector-absorption refrigeration cycles (while the ejector is located between the condenser and the generator) and calculate the value of output variables. Furthermore, the effects of evaporator and generator temperature on irreversibility, coefficient of performance, exergy loss and exergy efficiency of the aforementioned cycles have been investigated. We observe that, under identical conditions (i.e. equal temperature of evaporator and condenser), the efficiency of the combined ejector-absorption refrigeration cycle relative to the single effect absorption refrigeration cycle can be increased by more than 30%, but there is not a significant difference in the exergy efficiency of the two cycles. Keywords: Single-effect Absorption Refrigeration System, Combined Ejector-Absorption, Energy, Exergy, Coefficient of performance. 1 - I ?: -8 K> GT : b6 : GN 23 -6B : -=C Q= GN : -: O ]Y 6 .8B 2F ?BHH 2F : a/ b6 : 1 -B OB 7F 6 23 : a/ 2F 2F a/ .F B / 2 H.C : ... 23 : =B 1 CFCs Q/ : a/ B)C 2F =B - -. / 7 F ] 3 - 1 .[ @A 2C Gf 23 gB : 23 23 28@ > ?: 2> .. a/ F FC < 23 Q/ [h -B G=/ ;/ / B - ] F ‘7 i .8B ٢ ] -.F 4 ] [ @A B ? 4T @A C - 4M B B)C 2 8 jY< 1b ? . /B 2 Wang

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Energy and Exergy Analysis of Single Effect Absorption and Combined Ejector-

Absorption Refrigeration include Aqueous Lithium Bromide Solution

Energy and Sustainable Development Research Center, Semnan Branch, Islamic Azad University, Semnan, Iran S. R. Fakheri

Energy and Sustainable Development Research Center, Semnan Branch, Islamic Azad University, Semnan, Iran H. Kargarsharifabad

Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran H. Sakhaeinia

Abstract In this paper, the energy and exergy of single effect absorption and combined ejector-absorption refrigeration cycles are carried out analytically. Having analyzed the cycles and presented the governing equations with their expansion in EES software, we analyze the energy and exergy (from the viewpoint of the first and second law of thermodynamics) of both single effect absorption and combined ejector-absorption refrigeration cycles (while the ejector is located between the condenser and the generator) and calculate the value of output variables. Furthermore, the effects of evaporator and generator temperature on irreversibility, coefficient of performance, exergy loss and exergy efficiency of the aforementioned cycles have been investigated. We observe that, under identical conditions (i.e. equal temperature of evaporator and condenser), the efficiency of the combined ejector-absorption refrigeration cycle relative to the single effect absorption refrigeration cycle can be increased by more than 30%, but there is not a significant difference in the exergy efficiency of the two cycles.

Keywords: Single-effect Absorption Refrigeration System, Combined Ejector-Absorption, Energy, Exergy, Coefficient of performance.

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