空气换热式微热管阵列梯级相变蓄热装置的蓄放热性能  

Thermal Characteristics of an Air Cascade Latent Heat Storage Unit Based on Micro-Heat Pipe Array

作　　者：王媛媛[1] 刁彦华[1] 赵耀华[1] 王泽宇 王镇 WANG Yuanyuan;DIAO Yanhua;ZHAO Yaohua;WANG Zeyu;WANG Zhen(Beijing University of Technology,Beijing 100124,China;China Nuclear Power Engineering Co.Ltd.,Beijing 100840,China)

机构地区：[1]北京工业大学,北京100124 [2]中国核电工程有限公司,北京100840

出　　处：《新能源进展》2023年第5期395-403,共9页Advances in New and Renewable Energy

基　　金：北京市自然科学基金面上项目(3192009)。

摘　　要：可再生能源例如太阳能等,是实现碳达峰、碳中和目标的重要能源形式,但其存在间歇性与不规律性等问题。将相变蓄能技术与可再生能源结合可以利用相变蓄能技术提高系统的稳定性。提出微热管阵列梯级相变蓄热系统,以空气为换热流体,以52#石蜡和月桂酸作为梯级蓄热的两种相变材料,研究梯级蓄热装置在换热流体不同进口温度、不同流量下的蓄热特性。结果显示,该装置在较大的填充率下缩短了蓄放热时间,完成蓄热过程所需时间与单级蓄热装置相比缩短了43.75%。换热流体进口温度对梯级蓄热系统传热性能有较大影响。梯级蓄热装置的蓄热效率和放热效率分别为88.9%和76.8%。蓄热过程中,梯级蓄热装置蓄热器1和蓄热器2的平均有效性分别为0.51和0.45。Renewable energy,such as solar energy,is an important form of energy to achieve carbon peaking and carbon neutrality goals.However,it suffers from problems such as intermittency and irregularity.Combining phase change energy storage technology with renewable energy sources can improve the stability of the phase change energy storage technology.A cascade phase change heat storage system of micro-heat pipe array was proposed,by using air as the heat exchange fluid and 52#paraffin wax and lauric acid as two phase change materials,the heat storage characteristics of the cascade heat storage device under different inlet temperatures and different flow rates of the heat exchange fluid were studied.Results showed that,the time required to complete the heat storage process was shortened by 43.75%compared with the single-stage heat storage device at a larger filling rate.The inlet temperature of the heat transfer fluid had a great influence on the heat transfer performance of the step heat storage system.The heat storage efficiency and heat release efficiency of the step heat storage device were 88.9%and 76.8%,respectively.The average effectiveness of the heat storage process was 0.51 and 0.45 for heat accumulator 1 and heat accumulator 2 of the step accumulator,respectively.

关 键 词：微热管阵列 梯级蓄热装置 相变蓄热 百叶窗翅片 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]