Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (11): 59-62.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Effect of Length Ratio of Heating Section to Cooling Section on Properties of Oscillating Heat Pipe

Wang Shuang-feng1 Nishio Shigefumi2   

  1. 1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education , South China Univ. of Tech. , Guangzhou 510640 ， Guangdong, China; 2. Institute of Industrial Science , Univ. of Tokyo, Tokyo 153-8505 , Japan
  • Received:2006-12-22 Online:2007-11-25 Published:2007-11-25
  • Contact: 汪双凤(1964-) ，女，教授，博士生导师，主要从事多相流动与传热，微小尺度热管技术与热声效应的研究. E-mail:sfwang@scut. edu.cn
  • About author:汪双凤(1964-) ，女，教授，博士生导师，主要从事多相流动与传热，微小尺度热管技术与热声效应的研究.
  • Supported by:

    华南理工大学引进入才启动基金( B10D6050060)

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Abstract:

A series of experiments were performed to investigate the effect of length ratio of heating section to cooling section on the ultimate heat-transport capability of oscillating heat pipe (OHP) , and to reveal the heat transfer performance of the heat pipes with five different length ratios of different fluid-filling ratios. In the experiments , copper pipes with an inner diameter of 0.9 mm , an outer diameter of 1. 5 mm and a length of 1560mm were adopted , and R141b was used as the working fluid. The results show that , when the fluid-filling ratio is relatively low , the ultimate heat-transport capability is maximum at a heating-section ltmgth equal to the cooling one , however , when the fluid-filling ratio is relatively high , the OHP whose heating-section length is greater than the cooling one has the maximum heat-transport capability.

Key words: oscillating heat pipe, heating section, cooling section, length, fluid-filling ratio, ultimate heat-transport capability