新型微通道平板热管蓄冰性能

Characteristics of ice storage based on new type of flat micro heat pipe arrays

将微通道平板热管应用于蓄冰技术,设计了一种新型热管蓄冰装置,介绍了该装置的结构和工作原理,搭建了热管蓄冰实验台。对微通道平板热管作为蓄冰装置核心传热元件的适用性进行了实验验证,并对采用R141b和丙酮两种不同沸点工质热管的蓄冰装置在蓄冰过程中的温度分布、蓄冷功率、蓄冷量和蓄冷能量密度等特性进行了对比分析。实验结果表明,微通道平板热管蓄冰装置具有良好的蓄冷性能,相同时间内,R141b和丙酮热管的平均蓄冷功率分别为0.14 kW和0.187 kW,单位质量蓄冷量分别为139.22 kJ·kg^?1和184.33 kJ·kg^?1;丙酮比R141b热管具有更好的均温性能和传热能力,蓄冰性能更好;丙酮和R141b热管结构蓄冰装置的蓄冷能量密度分别为22.54 J·K^?1?kg^?2和17.61 J·K^?1?kg^?2,性能优于圆形热管蓄冰装置。

This study experimentally investigated a new type of ice storage device(ISD)based on flat micro heat pipe arrays(FMHPAs).The structure and working principle of device were explained in details,and test rig was built.The applicability of FMHPAs as the core heat transfer element was experimentally verified,the characteristics of temperature distribution,cold storage power,cold storage capacity and cold storage density of ISD based on FMHPAs with different boiling temperature working fluids(R141b and acetone)are compared and analyzed.The results showed that ISD based on FMHPAs presented well performance.In the same time,the average cold storage power of FMHPAs with R141b and acetone was 0.14 kW and 0.187 kW,respectively,and the cold storage capacity per unit mass was 139.22 kJ·kg^?1 and 184.33 kJ·kg^?1,respectively.The cold storage density of ISD based on FMHPAs with R141b and acetone was 22.54 J·K^?1?kg^?2 and 17.61 J·K^?1?kg^?2,their performance better than ISD based on circular heat pipe.