空气-多孔道扁管相变蓄热装置换热性能研究

空气-相变蓄热装置在农作物干燥、烟气余热回收和建筑供暖等场合需求强烈.但是目前关于空气-相变蓄热装置的研究较少且大多为平板型.本研究在已有研究的基础上,针对多孔道扁管相变蓄热装置存在换热结构不合理和灌装率较低的缺点,使用数值模拟的方法研究了 4种结构的多孔道扁管相变蓄热装置的蓄热性能;通过改变扁管肋高度提升蓄热装置的灌...

Thermal Performance of An Air-multichannel Flat Tube Phase Change Thermal Storage Device

Air-phase change thermal storage devices are in great demand in the fields of crop drying,flue gas waste heat recovery and building heating.However,the current research on air-phase change thermal storage devices is few and the structure is mostly flat.Based on previous experimental studies,this study used numerical simulation methods to study the thermal performance of four structures of multichannel channel flat tube phase change thermal storage devices to ease the problems of irrational heat transfer structure and low compact factor.The compact factor of the device is improved by changing the height of the flat tube ribs.The effectiveness and specific power are used as evaluation indicators.The results show that when the length of the multichannel flat tube is perpendicular to the direction of gravity and the air is injected from the side,the performance of the device is greatly exerted.Compared with the original research,the phase change completion time is improved by 20.59%.The results show that 0.03 m is a reasonable flat tube rib height.In this case,the compact factor is 61.5%.