1. A comprehensive thermodynamic analysis and performance evaluation of a transcritical ejector expansion CO2 adsorption refrigeration system integrated with thermoelectric sub-cooler.
- Author
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Gautam and Sahoo, Satyabrata
- Subjects
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HEAT recovery , *ADSORPTION (Chemistry) , *THERMOELECTRIC materials , *CARBON dioxide , *REFRIGERATION & refrigerating machinery , *COOLING systems - Abstract
A detailed performance evaluation of modified transcritical CO 2 adsorption refrigeration systems integrated with an ejector and a thermoelectric sub-cooler is carried out using simplified thermodynamic models. The simultaneous effect of subcooling and the lift produced by the ejector on system COP and the specific cooling effect (SCE) is expounded. It is observed that the proposed system yields an identical COP with that of heat and mass recovery systems with reduced design and operational complexity. However, the heat and mass recovery systems clubbed with ejector and thermoelectric sub-cooler yield the best system performance with a maximum increment of 126% in COP. The gas cooler pressure and subcooling temperature strongly affect the entrainment ratio; however, COP and SCE strongly depend on gas cooler pressure, evaporator and generator temperatures. The maximum COP attained (i.e., 0.353) using the novel adsorbent (M-AC C-500) in the modified system can be used as a benchmark. [Display omitted] • Thermodynamic study is done on a CO 2 -based transcritical adsorption cooling system. • Enhanced system performance is achieved by various cycle modifications. • different activated carbon-CO 2 pairs are compared for best cycle modification. • M-AC C-500 yields the maximum COP of 0.353 and SCE of 123.10 kJ/kg. • Effects of critical design and operating parameters are studied in detail. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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