Isothermal Adsorption Measurement for the Development of High Performance Solid Sorption Cooling System

Bidyut Baran Saha, Shigeru Koyama, K. C. Amanul Alam, Yoshinori Hamamoto, Atsushi Akisawa, Takao Kashiwagi, Kim Choon Ng, Hui Tong Chua

Research output: Contribution to journalArticlepeer-review

Abstract

Interest in low-grade thermal heat powered solid sorption system using natural refrigerants has been increased. However, the drawbacks of these adsorption systems are their poor performance. The objective of this paper is to improve the performance of thermally powered adsorption cooling system by selecting new adsorbent-refrigerant pairs. Adsorption capacity of adsorbent-refrigerant pair depends on the thermophysical properties (pore size, pore volume and pore diameter) of adsorbent and isothermal characteristics of the adsorbent-refrigerant pair. In this paper, the thermophysical properties of three types of silica gels and three types of pitch based activated carbon fibers are determined from the nitrogen adsorption isotherms. The standard nitrogen gas adsorption/desorption measurements on various adsorbents at liquid nitrogen of temperature 77.4 K were performed. Surface area of each adsorbent was determined by the Brunauer, Emmett and Teller (BET) plot of nitrogen adsorption data. Pore size distribution was measured by the Horvath and Kawazoe (HK) method. Adsorption/desorption isotherm results showed that all three carbon fibers have no hysteresis and had better adsorption capacity in comparison with those of silica gels.
Original languageEnglish
Pages (from-to)135-141
Number of pages7
JournalTransactions of the Japan Society of Refrigerating and Air Conditioning Engineers
Volume20
Issue number3
DOIs
Publication statusPublished - Sep 30 2003

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