堆积床相变蓄热过程中传热特性数值分析

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中图分类号：TK02 文献标志码：A

Abstract：Inordertosolvetheproblemof intermitencyinsolarphotovoltaicpower generation，anunsteadystatemodelof the packedbedphasechangeheatstoragetankwasestablished，andtheinfluenceof inletflowrate，inlettemperatureandinitial temperatureonthe heat storage processwas studied bynumericalsimulation.Theresultsshowthat increasingtheinlettemperature is the most efective way to improve the heat storage power.When the inlet temperature is 363K ，the heat storage power is increased by 21.2% and 75.2% respectively compared with that of 353 and 343K ．The increase of inlet flow rate doesnotchangethetotalamountofheatstorage，butresultsinahigherheatstoragepowerandanincreaseinthethickness of the thermocline.The heat storage power at the inlet flow rate of 0.001m/s is 20.4% and 64.8% higher than that of 0.0008 and 0.0006m/s ，respectively.The heat storage power at an initial temperature of 290K is 6.2% and 12.7% higher than that of 295K and 300K ，respectively，but the initial temperature has few effects on the thickness of the thermocline.

Keywords：packed bed；phase change heat storage；thermocline；energy storage传统能源的使用使得雾霾等环境问题日益严 重，开发清洁能源刻不容缓[1]。（剩余11347字）