Study on a twin-bed adsorption refrigeration system using R134a-activated carbon pair

Pinto, SP and Basavapatna Govindasetty, R and Karanam, P and Behera, U and Kasthurirengan, S (2019) Study on a twin-bed adsorption refrigeration system using R134a-activated carbon pair. In: Heat Transfer - Asian Research, 48 (4). pp. 1264-1279.

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Abstract

A low capacity twin-bed adsorption refrigeration system has been built with R134a as a refrigerant and activated carbon as the adsorbent. Simple tube-in-tube heat exchangers have been fabricated and have been used as the adsorber beds. Activated carbon (granular type) has been filled in the annular space of the inner tube and outer tube. A plate heat exchanger has been used as the condenser and the temperature of cooling water has been maintained between 25°C and 30°C, also the evaporator has been custom designed as per requirements. A mathematical model has also been developed and the results obtained have been found to be comparable. While operating the system in the single-bed mode a cooling power of 250.4 W has been obtained with a coefficient of performance (COP) of 0.38 with an average evaporator temperature of 18.4°C against a predicted value of 263.7 W with a COP of 0.41. While operating in the twin-bed mode a cooling power of 281.3 W with a COP of 0.47 with an average evaporator temperature of 17.6°C has been obtained against a predicted value of 294.5 W with a COP of 0.52.

Item Type:	Journal Article
Publication:	Heat Transfer - Asian Research
Publisher:	John Wiley and Sons Inc.
Additional Information:	The copyright for this article belongs to John Wiley and Sons Inc.
Keywords:	Activated carbon; Adsorption; Cooling water; Desorption; Evaporators; Heat exchangers; Mathematical models; Meteorology; Preheating; Refrigeration, A-coefficient; Annular space; Bed adsorption; Cooling power; Evaporator temperature; Plate heat exchangers; precooling; Tube-in-tube heat exchanger, Coefficient of performance
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Date Deposited:	27 Dec 2022 04:42
Last Modified:	27 Dec 2022 04:42
URI:	https://eprints.iisc.ac.in/id/eprint/78555

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