多通道平行流扁管-紧凑式翅片相变蓄热器蓄放热性能
摘要：摘要工业余热浪费严重、利用率较低且实际应用过程中受到时间和空间的限制,需要高效蓄热技术和装置来解决此类问题。提出一种将多通道平行流扁管与紧凑式翅片相结合的新型相变蓄热器,以水为载热流体,月桂酸为相变材料。实验研究了载热流体注入方式、流量、入口温度对蓄热器蓄/放热性能的影响,并分析小温差下蓄热器的传热特性。结果显示,该蓄热器相变材料填充率为82.5%,紧凑式翅片的采用极大强化了相变材料侧换热过程,蓄/放热性能优良。当载热流体入口温度分别为45β℃和41β℃时,相变材料约在270 min和75 min完成相变,最小蓄/放热温差可达2β℃,最小温差时的平均蓄热比功率为25.18 W/kg,平均取热比功率为20.23 W/kg。
Abstract:：In view of the serious waste, the low utilization rate and the great limitation in time and space in the actual application process of industrial waste heat, efficient heat storage technology and devices are needed to solve such problems. This paper proposed a new phase change heat storage device combining multi-channel parallel flow flat tube with compact fins, which used water as the heat transfer fluid and lauric acid as the phase change material. The effects of injection method, flow rate and inlet temperature on the heat storage and release performance of the device were studied experimentally. Besides, the thermal performance of the device under small temperature difference was analyzed. The results show that the phase change material filling rate of the device is 82.5%, and the use of compact fins greatly strengthens the phase change materialʹs side heat transfer process, as well as its excellent heat storage and release performance. When the inlet temperature of the heat exchange fluid is 45 °C/41 °C respectively, the phase change material completes the phase change at about 270 min/75 min. So the heat storage and heat release temperature difference can reach 2 °C. The average heat storage specific power at the minimum temperature difference can reach 25.18 W/kg and the average heat extraction ratio power can reach 20.23 W/kg.
中文标题：多通道平行流扁管-紧凑式翅片相变蓄热器蓄放热性能
英文标题：Heat Charge/Discharge Characteristics of Multi-Channel Parallel Flow Flat Tube-Compact Finned Latent Heat Storage Device
发表时间：2023-08-10
作者：
杜慧婷, 刁彦华, 赵耀华, 王泽宇, 王国珍
作者简介：
杜慧婷（2000-）,女,硕士研究生,主要从事高效相变蓄能技术研究。刁彦华（1973-）,男,博士,副教授,主要从事太阳能热利用、相变蓄热、热回收及强化换热技术研究。
关键词：相变蓄热,多通道平行流扁管,紧凑式翅片,小温差,
Key words：phase change heat storage,multi-channel parallel flow flat tube,compact fins,small temperature difference,
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