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1、新型空调蓄冷材料四丁基溴化铵-水相变条件和相变热实验研究第3O卷第5期2009年10月制冷JournalofRefrigerationVo1.30.No.5October2009文章编号:0253-4339(2009)05—0024—03DOI编码:10.3969/j.issn.0253—4339.2009.05.024新型空调蓄冷材料四丁基溴化铵一水相变条件和相变热实验研究孙志高工江承明孙立(1.苏州科技学院环境科学与工程学院苏州215011;2.中山大学工学院广州510275)摘要四丁基溴化铵水溶液在适当的浓度范围
2、内可在常规空调冷冻水温区内发生固一液相变,形成半笼水合物,是一种潜在的空调蓄冷理想材料.利用实验室的水合物形成实验装置测量了四丁基溴化铵水溶液固一液相变条件,实验结果表明当溶液的质量浓度低于45%时,相变温度随着溶液浓度的增大而增大,但当溶液浓度超过25%,相变温度增加的幅度减小.四丁基溴化铵水溶液的浓度超过45%后,其固一液相变温度反而下降.利用DSCN量了四丁基溴化铵水溶液的相变热,相变热达~1J195.9kJ/kg.关键词工程热物理;蓄冷:相变条件;相变热;四丁基溴化铵中圈分类号:TK02;TB612文献标识码:
3、AExperimentonPhaseChangeConditionsandPhaseChangeLatentHeatofTetra—n—butylAmmoniumBromideAqueousSolutionsforColdStorageSunZhigao'JiangChengmingSunLi(1.SchoolofEnvironmentalScienceandEngineering,SuzhouUniversityofScienceandTechnology,Suzhou215011,China;2.Schoolofe
4、ngineering,SunYat-SenUniversity,Guangzhou,510275,China)AbstractTetra一一butylammoniumbromide(TBAB)aqueoussolutioncanformsemi—clathratehydrateatsuitablesolutionconcentrationandtemperatureofchilledwateratatmospherepressure.Itisapotentialsolid—liquidphasechangemateri
5、alforcoldstorageinairconditioningsystems.Thesolid—liquidphasechangeconditionsofTBABaqueoussolutionswereexperimentallymeasuredusingthetestrigforhydrateformation.TheexperimentalresultsshowthatthephasechangetemperatureoftheTBABhydrateincreasedwiththeincreaseoftheco
6、ncentrationoftheTBABaqueoussolutionwhenthesolutionconcentrationwaslessthan45%,buttheincrementofthephasechangetemperaturedecreasedwhentheTBABsolutionmassfractionexceeded25%.ThephasechangetemperatureoftheTBABhydratedecreasedwiththeincreaseintheconcentrationoftheTB
7、ABaqueoussolutionwhenthesolutionconcentrationwasmorethan45%.ThephasechangelatentoftheTBABaqueoussolutionwasmeasuredusingtheDSCrigandthetestresultshowsthatthephasechangelatentwasabout195.9kJ/kg.KeywordsEngineeringthermophysics;Coldstorage;Phasechangeconditions;Ph
8、asechangelatentheat;Tetra一"一butylammoniumbromide随着经济和社会的持续发展,工业和居民用电量越来越大,我国电网的负荷和"峰谷"差也越来越大,每到夏天用电高峰季节拉闸限电的现象时有发生,严重影响了工业生产和人民的生活.引起电网"峰谷"差不断增大的原因之一就是空调的使用越来越普及,空调消耗