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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

TRANSIENT NUMERICAL STUDY OF NOVEL COMPOSITE ADSORBENT FOR COOLING APPLICATIONS

Sourav Mitra
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Animesh Pal
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Kyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1 Kasuga-shi, Fukuoka 816-8580, Japan

Kyaw Thu
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Kyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1 Kasuga-shi, Fukuoka 816-8580, Japan

Bidyut Baran Saha
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Kyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1 Kasuga-shi, Fukuoka 816-8580, Japan; Mechanical Engineering Department, Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Abstract

Adsorption chillers can utilize low grade thermal energy, replacing the mechanical compression process of conventional chillers with thermal compression. However, majority of the adsorption chillers developed are bulky due to low volumetric uptake and poor heat transfer. This paper uses an activated carbon based composite adsorbent to mitigate the above mentioned drawbacks. This composite contains expanded graphite as thermal conductivity enhancer. A 2-dimensional transient thermal analysis is employed to simulate the adsorption dynamics of ethanol (refrigerant) on the composite adsorbent and loosely packed parent activated carbon powder. The comparative study reveals that the use of composite adsorbent leads to multi-fold rise in volumetric cooling capacity and a marginal increase in coefficient of performance when compared to parent material. Thus, use of composite adsorbents can potentially lead to the development of compact and efficient adsorption chillers.

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