Energy and Exergy Analyses of Adsorption Chiller at Various Recooling-Water and Dead-State Temperatures

Ahmad A. Alsarayreh, Ayman Al-Maaitah, Menwer Attarakih and Hans-Jörg Bart
Additional contact information
Ahmad A. Alsarayreh: Precision Industries, P.O. Box 37448, Dubai, United Arab Emirates
Ayman Al-Maaitah: Wahaj Investment L.L.C., 24B St, Comm-365, Ind 2-Dubai, United Arab Emirates
Menwer Attarakih: Department of Chemical Engineering, University of Jordan, Queen Rania St, Amman 11942, Jordan
Hans-Jörg Bart: Thermische Verfahrenstechnik, TU Kaiserslautern, 67653 Kaiserslautern, Germany

Energies, 2021, vol. 14, issue 8, 1-15

Abstract: We conducted energy and exergy analyses of an adsorption chiller to investigate the effect of recooling-water temperatures on the cooling capacity and Coefficient of Performance (COP) with variable cycle modes. We investigated both the effect of the recooling-water temperature and the dead state temperature on the exergy destruction in the chiller components. Our results show that there is an optimum reheat cycle mode for each recooling-water temperature range. For the basic single stage cycle, the exergy destruction is mainly accrued in the desorber (49%), followed by the adsorber (27%), evaporator (13%), condenser (9%), and expansion valve (2%). The exergy destruction for the preheating process is approximately 35% of the total exergy destruction in the desorber. By contrast, the precooling process is almost 58% of the total exergy destruction in the adsorber. The exergy destruction decreases when increasing the recooling-water and the dead state temperatures, while the exergy efficiency increases. Nonetheless, the exergy efficiency decreases with an increase in the recooling-water temperature at fixed dead state temperatures. The effect of the mass recovery time in the reheat cycle on exergy destruction was also investigated, and the results show that the exergy destruction increases when the mass recovery time increases. The exergy destruction in the adsorbent beds was the most sensitive to the increase in mass recovery time.

Keywords: adsorption; exergy; dead state; adsorption cooling; reheat cycle, mass recovery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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