Study on thermal performance and flow behavior of myristyl alcohol phase change material microencapsulated with hybrid shell in minichannels

Microencapsulated phase change materials (MEPCMs) in minichannels have emerged as promising solutions for electronic cooling, offering efficient thermal management in compact spaces. The present work focuses on organic alcohol based microencapsulated phase change material slurries as heat transfer fluid in minichannels and the novel MEPCM is prepared with hybrid shell. The myristyl alcohol phase change material (MAL PCM) is microencapsulated with boron nitride/silica hybrid shell (MAL@BN/SiO2) 2 ) through sol-gel process. The morphology, phase change and thermal properties of the encapsulated samples are analyzed. The MAL@BN/ SiO2-2 2-2 exhibits good thermal stability and thermal conductivity. The working fluid is prepared with different weight percentage of MAL@BN/SiO2-2 2-2 along with water. Experimentation is carried out to examine the thermal performance and flow behavior of straight (CH-1), wavy (CH-2) and semi-wavy (CH-3) minichannels with different mass flow rates, heat inputs and working fluids. Results reveal that CH-1 with 0.1 % MAL@BN/SiO2-2 2-2 slurry exhibits higher Nusselt number (i.e., 15.51 %) than water for a Reynolds number of 623 with a heat input of 100 W. Similarly, the enhancement with CH-2 and CH-3 are respectively, 21.61 and 23.27%. The performance evaluation factor is maximum for CH-3 compared to other considered minichannels.