文档介绍：中国工程热物理学会传热传质学
学术会议论文编号:123512
CaCl2-NH3吸附式制冷吸附床的传热模拟与结构分析
候庆林,林艳,马连湘,何燕
(青岛科技大学机电工程学院,青岛市崂山区松岭路99号,266061)
(Tel: 0532-88959059, Email: houql88@)
摘要建立了CaCl2-NH3化学吸附制冷吸附床的物理模型和数学模型,对吸附剂填充总量不变的情况下,不同填充层数和每层填充厚度的吸附床的解吸过程进行三维传热模拟。结果表明,填充层数越多,吸附床温度最低点的温度值越低,达到同一温度所需时间越长,传热效果越差。考虑吸附床的传质和化学反应所需温度,,填充层数为24时,吸附床的传热传质效果最好。
关键字化学吸附;吸附制冷;吸附床;数值模拟
Numerical Simulation and Structural Analysis for Adsorbent Bed of CaCl2-NH3 Adsorption Refrigeration
Qinglin Hou, Yan Lin,Lianxiang Ma, Yan He
(Qingdao University of science and technology, Songling Road, Qingdao 266061)
Abstract: Mathematical model and physical model are described of the adsorbent bed of CaCl2-NH3 chemical adsorption refrigeration. Models of adsorbent beds with different filling thickness and number of filling layers are built for three dimensional heat transfer simulation. The result shows that more filling layers will decrease the minimum temperature and increase time for reaching the same temperature. Considering mass transfer and temperature for chemical reaction, the adsorption bed with filling thickness and 24 filling layers is believed to be the best one for heat and mass transfer.
Key words: Chemical adsorption; adsorption refrigeration; adsorption bed; Numerical simulation
0 前言
吸附式制冷采用环境友好型制冷剂,利用低品位能源驱动,在环保节能方面有着蒸汽压缩式制冷所不具有的优势[1-3]。然而吸附床内吸附剂的传热传质性能差,使得制冷循环周期较长,这是吸附式制冷没有得到广泛应用的主要