10 Thermodynamic Analysis of Activated Carbon–Ethanol …
203
10.9 Conclusion
Thermodynamics analysis of two cycles namely basic cycle and heat recovery cycle
is presented for activated carbon–ethanol and zeolite–water. Coefficient of performance (COP), Specific cooling effect (SCE), and Second law efficiency (η I I ) are
studied with respect to five input i.e. maximum desorption temperature, minimum
adsorption temperature, condensing temperature, evaporating temperature, and heat
capacity ratio. Maximum desorption temperature plays significant role in finding
the maxima of COP and Second law efficiency (η I I ). But the maxima of both the
parameters found to be at different range of temperature. A graphical method to find
common temperature so that neither COP nor second law efficiency is sacrificed
in maximizing the individual entities is discussed. Activated carbon–ethanol performs better at low desorption temperature while zeolite–water is suitable for high
desorption temperature applications.
References
Aristov YI, Restuccia G, Cacciola G, Parmon VN (2002) A family of new working materials for
solid sorption air conditioning systems. Appl Therm Eng 22(2):191–204
Cacciola G, Restuccia G (1995) Reversible adsorption heat pump: a thermodynamic model. Int J
Refrig 18(2):100–106
Choudhury B, Saha BB, Chatterjee PK, Sarkar JP (2013) An overview of developments in adsorption
refrigeration systems towards a sustainable way of cooling. Appl Energy 104:554–567
Critoph RE (1994) Forced convection enhancement of adsorption cycles. Heat Recovery Syst CHP
14(4):343–350
Critoph RE, Turner HL (1988) Performance of ammonia–activated carbon and ammonia–zeolite
heat pump adsorption cycles. In: Proceedings of the international conference on Pompes a Chaleur
Chimiques de Hautes Performances, Perpignan, France, pp 202–11
Critoph RE, Vogel R (1986) Possible adsorption pairs for use in solar cooling. Int J Ambient Energy
7(4):183–190
Douss N, Meunier F (1989) Experimental study of cascading adsorption cycles. Chem Eng Sci
44(2):225–235
El-Sharkawy II, Saha BB, Koyama S, He J, Ng KC, Yap C (2008) Experimental investigation on
activated carbon–ethanol pair for solar powered adsorption cooling applications. Int J Refrig
31(8):1407–1413
Gasser RPH, Ehrlich G (1987) An introduction to chemisorption and catalysis by metals. Phys
Today 40:128
Grenier P, Guilleminot JJ, Meunier F, Pons M (1988) Solar powered solid adsorption cold store. J
Sol Energy Eng 110(3):192–197
Hajji A, Worek WM, Lavan Z (1991) Dynamic analysis of a closed-cycle solar adsorption refrigerator using two adsorbent-adsorbate pairs. J Sol Energy Eng 113(2):73–79
Hansen J, Ruedy R, Sato M, Lo K (2010) Global surface temperature change. Rev Geophys 48(4)
Hulse GE (1929) Freight car refrigeration by an adsorption system employing silica gel. Refrig Eng
17(2):41–53
Jones JA, Golben PM (1985) Design, life testing, and future designs of cryogenic hydride refrigeration systems. Cryogenics 25(4):212–219
203
10.9 Conclusion
Thermodynamics analysis of two cycles namely basic cycle and heat recovery cycle
is presented for activated carbon–ethanol and zeolite–water. Coefficient of performance (COP), Specific cooling effect (SCE), and Second law efficiency (η I I ) are
studied with respect to five input i.e. maximum desorption temperature, minimum
adsorption temperature, condensing temperature, evaporating temperature, and heat
capacity ratio. Maximum desorption temperature plays significant role in finding
the maxima of COP and Second law efficiency (η I I ). But the maxima of both the
parameters found to be at different range of temperature. A graphical method to find
common temperature so that neither COP nor second law efficiency is sacrificed
in maximizing the individual entities is discussed. Activated carbon–ethanol performs better at low desorption temperature while zeolite–water is suitable for high
desorption temperature applications.
References
Aristov YI, Restuccia G, Cacciola G, Parmon VN (2002) A family of new working materials for
solid sorption air conditioning systems. Appl Therm Eng 22(2):191–204
Cacciola G, Restuccia G (1995) Reversible adsorption heat pump: a thermodynamic model. Int J
Refrig 18(2):100–106
Choudhury B, Saha BB, Chatterjee PK, Sarkar JP (2013) An overview of developments in adsorption
refrigeration systems towards a sustainable way of cooling. Appl Energy 104:554–567
Critoph RE (1994) Forced convection enhancement of adsorption cycles. Heat Recovery Syst CHP
14(4):343–350
Critoph RE, Turner HL (1988) Performance of ammonia–activated carbon and ammonia–zeolite
heat pump adsorption cycles. In: Proceedings of the international conference on Pompes a Chaleur
Chimiques de Hautes Performances, Perpignan, France, pp 202–11
Critoph RE, Vogel R (1986) Possible adsorption pairs for use in solar cooling. Int J Ambient Energy
7(4):183–190
Douss N, Meunier F (1989) Experimental study of cascading adsorption cycles. Chem Eng Sci
44(2):225–235
El-Sharkawy II, Saha BB, Koyama S, He J, Ng KC, Yap C (2008) Experimental investigation on
activated carbon–ethanol pair for solar powered adsorption cooling applications. Int J Refrig
31(8):1407–1413
Gasser RPH, Ehrlich G (1987) An introduction to chemisorption and catalysis by metals. Phys
Today 40:128
Grenier P, Guilleminot JJ, Meunier F, Pons M (1988) Solar powered solid adsorption cold store. J
Sol Energy Eng 110(3):192–197
Hajji A, Worek WM, Lavan Z (1991) Dynamic analysis of a closed-cycle solar adsorption refrigerator using two adsorbent-adsorbate pairs. J Sol Energy Eng 113(2):73–79
Hansen J, Ruedy R, Sato M, Lo K (2010) Global surface temperature change. Rev Geophys 48(4)
Hulse GE (1929) Freight car refrigeration by an adsorption system employing silica gel. Refrig Eng
17(2):41–53
Jones JA, Golben PM (1985) Design, life testing, and future designs of cryogenic hydride refrigeration systems. Cryogenics 25(4):212–219