期刊
ENERGY CONVERSION AND MANAGEMENT
卷 59, 期 -, 页码 33-39出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2012.02.004
关键词
Natural convection heat transfer; Phase change material (PCM); Microencapsulated PCM slurry (MPCMS); Heat transfer coefficient
资金
- Hunan Provincial Education Department [10B116]
- Central South University of Forestry and Technology [104-0105]
- Ministry of Science and Technology of China [2011DFA60290]
- National Natural Science Foundation of China [51146009]
The main purpose of this experiment is to evaluate natural convection heat transfer characteristics of microencapsulated PCM (phase change material) slurry (MPCMS) during phase change process in a rectangular heat storage tank heated from the bottom and cooled at the top. The microencapsulated PCM is several material compositions of n-paraffin waxes (mainly nonadecane) as the core materials, outside a layer of a melamine resin wrapped. In the present study, its slurry is used mixing with water. And the specific heat capacity with latent heat shows a peak value at the temperature of about T = 31 degrees C. We investigate the influences of the phase change process of the MPCMS on natural convection heat transfer. The experimental results indicate that phase change process of the MPCMS promote natural convection heat transfer. The local maximum heat transfer enhancement occurs at approximately T-H = 34 degrees C corresponding to the heated plate temperature. With high mass concentration C-m, the onset of natural convection gets easier for the MPCMS. The temperature gradient is larger near top plate and bottom plate of a rectangular heat storage tank. Heat transfer coefficient increases with the phase change of the PCM. And it summarizes that the phase change process of the PCM promote the occurrence of natural convection. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据