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Thermodynamic Analysis of a Compression-Driven Adsorption-Based Cooling System Using CO2 as the Refrigerant
The subject work includes a thermodynamic analysis and performance assessment of a compression-driven adsorption-based cooling system (CDACs) utilizing carbon dioxide as a refrigerant and Maxsorb-III as the adsorbent. The simple equilibrium analysis assumes a pressure swing isothermal adsorption/desorption process powered by a reciprocating compressor with varying pressure ratios. The influence of ambient and room temperatures on COP, second law efficiency, cooling effect, compression work, and parasitic losses are explored. All these parameters except the parasitic loss decrease with an increase in the surrounding temperature. For the given range of operating temperatures (308 K ≤ Tsurr ≤ 318 K and 281 K ≤ Troom ≤ 285 K) and maximum and minimum pressure (Pmax = 3.1 MPa, Pmin = 0.5 MPa), the COP varies from 0.47 to 4.78. The compression work is maximum for a high room temperature and low surrounding temperature. The CDACs system yields comparable COP to transcritical vapor compression refrigeration systems (VCRs) but at lower operating pressure for the same surrounding and room conditions. Moreover, for higher ambient temperatures, CDACs are preferable compared to the VCRs. Four different activated carbons prepared from various precursor materials are considered as the adsorbent for comparative analysis. The activated carbon, WPT-AC (C-500), yields a maximum COP of 5.1 and a specific cooling effect of 186.5 kJ kg−1.
Thermodynamic Analysis of a Compression-Driven Adsorption-Based Cooling System Using CO2 as the Refrigerant
The subject work includes a thermodynamic analysis and performance assessment of a compression-driven adsorption-based cooling system (CDACs) utilizing carbon dioxide as a refrigerant and Maxsorb-III as the adsorbent. The simple equilibrium analysis assumes a pressure swing isothermal adsorption/desorption process powered by a reciprocating compressor with varying pressure ratios. The influence of ambient and room temperatures on COP, second law efficiency, cooling effect, compression work, and parasitic losses are explored. All these parameters except the parasitic loss decrease with an increase in the surrounding temperature. For the given range of operating temperatures (308 K ≤ Tsurr ≤ 318 K and 281 K ≤ Troom ≤ 285 K) and maximum and minimum pressure (Pmax = 3.1 MPa, Pmin = 0.5 MPa), the COP varies from 0.47 to 4.78. The compression work is maximum for a high room temperature and low surrounding temperature. The CDACs system yields comparable COP to transcritical vapor compression refrigeration systems (VCRs) but at lower operating pressure for the same surrounding and room conditions. Moreover, for higher ambient temperatures, CDACs are preferable compared to the VCRs. Four different activated carbons prepared from various precursor materials are considered as the adsorbent for comparative analysis. The activated carbon, WPT-AC (C-500), yields a maximum COP of 5.1 and a specific cooling effect of 186.5 kJ kg−1.
Thermodynamic Analysis of a Compression-Driven Adsorption-Based Cooling System Using CO2 as the Refrigerant
J. Inst. Eng. India Ser. C
Kumar, Gyanesh (author) / Sahoo, Satyabrata (author)
Journal of The Institution of Engineers (India): Series C ; 104 ; 853-860
2023-08-01
8 pages
Article (Journal)
Electronic Resource
English
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