Using of Microencapsulated Phase Change Material Suspension to Enhance the Performance of Microchannel Heat Exchanger
AbstractThe aim of this paper is to improve thermal performance of a counter flow microchannel
heat exchanger (CFMCHE) by using microencapsulated phase change material slurry
(MEPCM suspension) as a cooling fluid instead of pure fluid. The MEPCM suspension used
in this paper consists of microcapsules constructed from n-octadecane as a phase change
material (PCM) and the shell material is Polymethylmethacrylat, these capsules are suspended
in water in a concentration of (0 – 20) %.
From the results, using of MEPCM suspensions as a cooling fluid leads to modify thermal
performance of a CFMCHE by increasing its effectiveness but it also leads to increase the
pressure drop. From heat transfer (thermal performance) point of view it is better to use this
type of fluid to increase cooling efficiency of a CFMCHE, but due to extra increase in
pressure drop it leads to reduce the overall performance compared with pure fluids. Therefore
its application depends on the conditions at which this heat exchanger is used.