| 摘要: |
| 本文针对常温并联式脉动热管搭建了采用恒温热水加热热管的实验系统，测试了以甲醇为介质，热管管径为4 mm时，不同的冷却形式、加热冷却温度和充液量对热管启动特性的影响；以甲醇为介质，不同热管管径（2 mm、4 mm 、6 mm 、8 mm）对热管等温性的影响；以及工质为甲醇和R600a，不同加热长度时（20 cm、25 cm、30 cm）热管的传热能力。实验结果表明：热管冷凝段采用水冷时较自然冷却启动快；较高的加热温度和较低的冷却温度有利于热管启动；热管启动时间随充液量的增加而增加。热管运行过程中在纵向和横向均具有良好的等温性，且随着热管管径的增大等温性逐渐降低。随加热温度的升高，工质为甲醇和R600a热管传热量的变化规律不同，缩短加热长度可以缓解过热度过高的不利影响。 |
| 关键词: 脉动热管 启动特性 等温性 传热量 |
| DOI： |
| Received:March 15, 2017 |
| 基金项目: |
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| Experimental Study on Startup and Operating Characteristics of Parallel Type Pulsating Heat Pipe under Normal Temperature |
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Xu Dengke1, Pang Jianyong1, Du Chuanmei1, Guan Eryong2
|
| (1.School of Civil and Architectural Engineering, Anhui University of Science and Technology;2.Anhui Institute of Pharmaceutical Design Institute) |
| Abstract: |
| An experimental system that used a constant hot-water-heating heat pipe was constructed to study the performance of a parallel-type pulsating heat pipe under normal temperature. With methanol as the medium and a heat pipe diameter of 4 mm, the effects of different cooling forms, heating and cooling temperatures, and liquid filling volumes on the starting characteristics were studied. The influence of different diameters (2 mm, 4 mm, 6 mm, and 8 mm) on the isothermal property was researched with methanol as the medium, and the heat-transfer capabilities with different heating lengths (20 cm, 25 cm, and 30 cm) under methanol and R600a as working media were investigated. The results showed that a condenser section that used water cooling was better than natural air cooling for heat pipe start-up. A higher heating temperature and lower cooling temperature were advantageous for the heat pipe start-up. The start-up time of the heat pipe increased with the filling quantity. During the running period, the heat pipe had a good isothermal property in the longitudinal and transverse directions, and the isothermal property gradually decreased with an increase in the heat pipe diameter. With an increase in the heating temperature, the changing laws for the heat-transfer capability were different when the working media are methanol and R600a. Shortening the evaporation segment length could alleviate the adverse effects of overheating on the heat pipe |
| Key words: pulsating heat pipe starting characteristic temperature uniformity heat transfer capability |
