Experimental study on the convective heat transfer behavior of microencapsulated phase change material suspensions in rectangular tube of small aspect ratio

An experimental study on the heat transfer performance of microencapsulated phase change material suspensions flowing in the rectangular tube of small aspect ratio (b/a = 0.14) is presented in this work. The slurry of higher MPCM concentration shows better cooling performance in the most section of dimensionless axial distance whereas worse in a small section at the beginning. Up to 20.6% of the dimensionless wall temperature was decreased by the 20 wt% MPCM suspension as compared to water.