The synthesized microencapsulated Pure PCM denoted as MEPCM1 and themicrocapsules of four composite PCMs with different mass fraction (0.05 wt %, 0.1 wt %,0.15 wt % and 0.2 wt %) of Ag doped ZnO were represented as MEPCM2, MEPCM3,MEPCM4 and MEPCM5 respectively.Pure PCM and four composite PCMs actas core material in MEPCMs.