Numerical Simulation on Coupled Heat and Mass Transfer in the Adsorber of an Adsorption Cooling System

• Main Authors: Jhih-Hong Wang, 王志宏
• Other Authors: Wen-Shing Lee
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/10307826567419860271

碩士 === 國立臺北科技大學 === 冷凍與低溫科技研究所 === 90 === A theoretical method is proposed to establish computer model to analysis adsorbent bed in adsorption cooling system. The influence of various design parameters on the performance of the adsorbent bed is discussed in particular. The theoretical analysis begins with the derivation of a set differential equations based on the porous media and thermal-fluid theory. The effects of heat source temperature, evaporator temperature, condenser temperature, adsorbent bed size, the diameter of copper tube, etc. are all considered in the derivation. The derived system of equations is then solved by using finite-volume method. In the present study, the effects of different design and operate parameters are investigated. Output variable such as adsorption/desorption amount,the ratio of adsorption/desorption was obtained. The result appear that using metallic fin can improve the ratio of adsorption/desorption sufficiently, i.e., at the first hour of simulation, it was possible to increase that the ratio of adsorption from 6.3﹪(no fin) to 12.4﹪(8mm fin pitch) and the ratio of desorption from 9.0﹪(no fin) to 16.3﹪(8mm fin pitch).