摘要
定形相变材料能够解决传统相变材料泄漏、传热性能差等问题,在电子元器件温控等领域具有较好的应用前景,但其温控精度受到相变材料物性参数、外界环境等因素的影响明显。本文通过建立定形相变材料的传热模型,在实验研究和数值分析的基础上分析各参数对温控精度的影响。研究结果显示定形相变材料热导率对温控精度的影响较大,温控精度随热导率的增加而提高;温控精度随加热功率的增加而降低,且当热导率小于1.76 W·m-1·K-1时温控精度降低明显;随相变温度宽度增加,相变材料的温控精度降低;相变材料厚度的增加导致温控精度降低。
Shape-stabilized phase change materials which can be used to resolve the problems such as traditional phase change material leakage and heat transfer performance, have a good applica- tion prospect in areas such as electronic temperature control, however, the temperature control precision are greatly effected by phase change material physical parameters, external environment and other factors. By setting up a heat transfer model of the shape-stabilized phase change materi- als, this paper analyzes the influence of various parameters on the temperature control precision on the basis of experimental study and numerical analysis. The results of the study show that thermal conductivity of the shape-stabilized phase change materials has great influence on temper- ature control precision, which rises with the increase of the thermal conductivity~ temperature control precision is decreases with the increase of the heating power. When the thermal conduc- tivity is less than 1.76W. m-1 .K-1 ,the temperature control precision is reduced obviously. And it reduces with the increase of heating power,with the increase of width of phase transition tem perature and the thickness of phase change materials.
出处
《航天器工程》
2014年第1期53-57,共5页
Spacecraft Engineering
关键词
定形相变材料
温控精度
物性参数
数值分析
shape-stabilized phase change materials
temperature control precision
physicalproperty parameter
numerical analysis
