THERMAL PERFORMANCE OF MICROENCAPSULATED PHASE CHANGE MATERIAL SLURRIES IN A HEATED HELICAL COIL

被引:0
|
作者
Kong, Minsuk [1 ]
Alvarado, Jorge L. [2 ]
Terrell, Wilson [3 ]
机构
[1] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA
[2] Texas A&M Univ, Engn Technol & Ind Distribut, College Stn, TX 77843 USA
[3] Trinity Univ, Dept Engn Sci, San Antonio, TX 78212 USA
来源
11TH IIR CONFERENCE ON PHASE CHANGE MATERIALS AND SLURRIES FOR REFRIGERATION AND AIR CONDITIONING | 2016年
关键词
Microencapsulated Phase Change Material (MPCM); Helical Coil; Pressure Drop; Friction Factor; Heat Transfer Coefficient; Nusselt Number; Performance Efficiency Coefficient; FLOW; ENERGY; PCM;
D O I
暂无
中图分类号
O414.1 [热力学];
学科分类号
摘要
An experimental study has been performed to determine the thermal physical characteristics of microencapsulated phase change material (MPCM) slurries in a heated helical coil. A heated helical coil was fully instrumented to determine friction factor and heat transfer coefficient of water and MPCM slurries. The thermal and fluid properties of the MPCM slurries were determined using a differential scanning calorimeter (DSC) and a rotating drum viscometer, respectively. The pressure drop of MPCM slurries under turbulent flow conditions was measured, and an appropriate dimensionless friction factor correlation has been postulated for MPCM slurries. The local convective heat transfer coefficient of MPCM slurries under turbulent flow conditions was determined, and a Nusselt number correlation has been postulated. The benefits of using MPCM slurries in a helical coil have been quantified by using the performance efficiency coefficient (PEC). The experimental results showed that using MPCM slurries instead of water leads to better performance in terms of heat capacity; however, the heat transfer performance enhancement still is limited by viscosity-related effects. Nevertheless, MPCM slurries perform better in helical coils than in straight tubes, which highlights the importance of selecting and using the appropriate types of heat exchanger for MPCM slurry applications.
引用
收藏
页码:254 / 262
页数:9
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