Research on Micro Channel Phase Change Heat Transfer

摘要：

The fluctuations of temperature and pressure, which lead to random actions of bubbles growth, are typical characteristics for a system of micro channel flow boiling due to its confined space. The formula of the average radius over an ensemble bubbles is put forward on the conditions of equilibrium bubble diameter and initial value. As a result, the equation for bubble random growth is obtained on the basis of the correlations of random factorsand a potential function and probability density of the system are studied by the steady state solution to the obtained equation. Furthermore, the nucleate flow boiling heat transfer coefficient formula was put forward according to the conclusions of heat soliton. Phase change heat transfer experiments are carried out to investigate its feasibility by parallel vertical mini channels with cross section: 0.3 mm別2mm, 0.6mm別2mm and 2 mm別2mm respectively. A computer control system is established to ensure the subcooling deionised water section is less than 4％ of the total stable length. Contrast figures were drawn between experimental data and theoretical results, which show the practicability of the proposed model.

关键词： Micro channel Phase change heat transfer Soliton Markov Process

作者: Xiaoping Luo Y. Y. Yan

作者单位: School of Mechanical and Automobile Engineering, South China University of Technology, Guangzhou ,51 Thermofluids Engineering,Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK

会议类型: 国际会议

会议名称: 4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)

会议地点: 广州

会议语种:英文

页码: 1-5

在线出版日期: 2012-01-06（万方平台首次上网日期，不代表论文的发表时间）