两级吸附式制冷工质对性能实验研究  

Experimental Investigation on Working Pairs for a Two-stage Sorption Refrigeration Cycle

作　　者：江龙[1] 路会同 王如竹[1] 王丽伟[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《制冷学报》2017年第6期7-11,共5页Journal of Refrigeration

基　　金：中国博士后科学基金(2015M581609);国家自然科学基金(51606118)资助项目~~

摘　　要：本文针对不同两级吸附工质对CaCl_2-Na Br-NH3,CaCl_2-BaCl_2-NH3,SrCl_2-BaCl_2-NH3与SrCl_2-NH4Cl-NH3进行了实验研究,同时模拟了两级吸附制冷样机的工作性能。结果表明:SrCl_2-NH4Cl-NH3与CaCl_2-Na Br-NH3的循环吸附量可以分别达到理论值的95.4%与88.6%;对于不同两级吸附工质对,样机系统的COP、制冷量与SCP分别介于0.215~0.285、2~3.65 k W与161.4~260.74 W/kg;采用硫化石墨配置吸附剂能够大幅度提高两级制冷系统的SCP,以CaCl_2-BaCl_2-NH3为例,与采用普通石墨作为基质相比,采用硫化石墨的系统SCP最高可以提高40.2%。Recently,a CaCl_2-BaCl_2-NH3 chemisorption freezing cycle driven by a low-temperature heat source has drawn an increasing amount of attention. To develop a working pair with a more desirable performance than CaCl_2-BaCl_2-NH3,working pairs of CaCl_2-Na BrNH3,SrCl_2-BaCl_2-NH3,and SrCl_2-NH4 Cl-NH3 were investigated and compared. Most composite adsorbents were developed with a novel matrix of expanded natural graphite treated with sulfuric acid( ENG-TSA),leaving one serial with expanded natural graphite( ENG) for comparison. For SrCl_2-NH4 Cl-NH3 and CaCl_2-Na Br-NH3,experimental results show that the maximum adsorption quantities are 95. 4%and 88. 6% of the theoretical values,respectively. Simulation results indicate that the best results are obtained from CaCl_2-Na Br-NH3,and its specific cooling power( SCP) and coefficient of performance( COP) are as high as 260. 74 W/kg and 0. 285,respectively,which are 15. 1% and 5. 6% better than the values for CaCl_2-BaCl_2-NH3. It is also noted that,for different working pairs,the COP,cooling capacity,and SCP range from 0. 215 to 0. 285,2 to 3. 65 k W,and 161. 4 to 260. 74 W/kg,respectively. Comparisons also show that the ENG-TSA matrix effectively improves the SCP. For example,the SCP of CaCl_2-BaCl_2-NH3 is improved by 40. 2%,when compared with a working pair with the ENG matrix.

关 键 词：吸附 制冷循环 工质对 硫化石墨 

分 类 号：TB61[一般工业技术—制冷工程] TB64