摘要
以三水醋酸钠为储热相变材料,添加成核剂和增稠剂,设计搭建二次换热式相变蓄热系统实验平台。通过实验分析了相变材料填充率、水的体积流率对相变蓄热水箱整体性能的影响。结果表明:蓄热时,二次换热式相变蓄热水箱温度分布比较均匀,相变材料升温速率与换热流体(HTF)升温度率基本保持一致。取热时,尽管添加的相变材料能够蓄存更多的热量,但相变蓄热袋占用了水箱的空间,影响水箱内换热流体对流传热。因此添加相变蓄热袋会影响蓄热水箱放热速率。与不填充相变材料的蓄热水箱对比,相变蓄热水箱取热量变小,取热效率降低。
With sodium acetate trihydrate as phase change material for heat storage, adding nucleating agent and a thickening agent, design and build the secondary heat exchanger of phase change thermal storage system experimental platform. In view of the different research contents, do the heat storage test of phase change heat storage tank based on different phase change materials filling rate and the flow rate of getting heat. The results show that the temperature of the secondary phase change heat storage tank is well-distributed; phase change material heating rate is almost the same as the heat transfer fluid（HTF） in tank during the heat storage process. In the heat taking process, though adding phase change materials can store more energy, the phase change heat storage bags take up the space in the tank, affecting convection heat transfer of the HIF in the tank. As a result, adding phase change heat storage bags will affect the releasing rate of the heat storage tank. Comparing with the heat storage tank without filling phase change materials, the phase change heat storage tank takes less heat and has lower getting heat efficiency.
出处
《广东化工》
CAS
2015年第13期22-24,15,共4页
Guangdong Chemical Industry
关键词
相变材料
相变蓄热水箱
二次换热
蓄放热特性
phase change material
latent heat storage water tank
secondary heat exchanger
heat storage performance
