CAJ | 학술논문

相变蓄冷是中央空调系统常用的节能技术。筛选了相变温度在4～6℃区间的材料作为冷水空调系统的蓄冷剂,最终选定十四烷,采用DSC对实验材料进行了热物性测试及老化测试;在自行搭建的恒温水浴实验系统中,对封装在不同直径的球形容器内的十四烷进行了蓄冷性能的实验测试。实验结果表明：十四烷的过冷度很小;存在自然对流现象,其中65mm直径的小球可以在所有测试条件下完成蓄冷;水浴温度越低相变用时越少,得到了蓄冷量随时间的变化规律;经过270次的重复实验,材料的热物性衰减很小。结论对扩展蓄冷技术在离心冷水机组的应用具有指导作用。
상변축랭시중앙공조계통상용적절능기술。사선료상변온도재4～6℃구간적재료작위랭수공조계통적축랭제,최종선정십사완,채용DSC대실험재료진행료열물성측시급노화측시;재자행탑건적항온수욕실험계통중,대봉장재불동직경적구형용기내적십사완진행료축랭성능적실험측시。실험결과표명：십사완적과랭도흔소;존재자연대류현상,기중65mm직경적소구가이재소유측시조건하완성축랭;수욕온도월저상변용시월소,득도료축랭량수시간적변화규률;경과270차적중복실험,재료적열물성쇠감흔소。결론대확전축랭기술재리심랭수궤조적응용구유지도작용。
Cool thermal energy storage of phase changing plays a significant role in energy conservation technologies of central air-conditioning systems.In This paper,one kind of phase change material was chosen as koelmiddelen for cold water air conditioning system in the temperature range of 4 to 6℃.Tetrad cane was chosen at last and a Differential Scanning Calorimeter（DSC） was used to determine the thermal physical properties.The experimental study on cold-storage characteristics of tetrad cane,filled in spherical capsules with three different diameters,was done on constant temperature water bath system.Experimental results indicated that natural convection phenomenon exists and tetrad cane shows small super cooling degree and good cyclical stability during cooling process.The ball with diameter 65mm can realize cold storage successfully in all the test conditions,and the lower temperature of water bath is the less time for complete solidification needed.Those conclusions are of great directive function for expanding applications of the cool thermal energy storage technology in the centrifugal water chillers.