四丁基溴化铵相变蓄冷材料热物性实验研究  

Experimental Study on Thermal Characteristics of Phase-change Material Tetra-n-butylammonium Bromide for Cool Storage

作　　者：张曼[1] 方贵银[1] 吴双茂[1] 杨帆[1] 

机构地区：[1]南京大学物理系,南京210093

出　　处：《制冷学报》2008年第5期8-11,共4页Journal of Refrigeration

基　　金：国家自然科学基金资助项目(50776043)~~

摘　　要：通过实验对四丁基溴化铵(TBAB)溶液的蓄冷结晶过程进行了测试,结果表明TBAB溶液的凝固温度随其浓度的改变而改变,在25%～45%的浓度范围内,其凝固温度位于5.8～9.3℃范围内。选取相变温度适宜、相变过程稳定、浓度为40%的TBAB溶液,向其添加硼砂成核剂,测试其相变温度和相变潜热,测试结果表明质量浓度为2%的硼砂在不影响TBAB溶液凝固温度的情况下可以降低其结晶过冷度2.4℃。采用示差扫描量热仪(DSC)测试TBAB溶液的熔解潜热为187.030kJ/kg。因此TBAB溶液是一种高效的空调蓄冷材料。The crystallization progress of tetra-n-butylammonium bromide solution was tested. The results indicate that the freezing point of TBAB solutions changes with concentration. The freezing point of TBAB solution changes from 5.8℃ to 9.3℃ while the concentration changes from 25% to 45%. As a nucleating agent, natrium biboricum was added to the TBAB solution with the concentration of 40%. Then the phase-change point and latent heat were tested. The results show that natrium biborieum with the concentration of 2% reduced the supercooling of TBAB solution crystallization by 2.4℃ without changing the freezing points of TBAB solution. Differential Scanning Calorimetry （DSC） was used to test the melting latent heat of TBAB solution and the melting latent heat was 187.030kJ/kg. Our conclusion is that TBAB solution is an efficient cool storage material for air conditioning systems.

关 键 词：工程热物理 蓄冷 相变材料 四丁基溴化铵(TBAB) 热物性 

分 类 号：TB612[一般工业技术—制冷工程] TK121[动力工程及工程热物理—工程热物理]