This experimental investigation reports the reserved thermal power in phase change material by electronic cooling with the implications of thermofluids due to evaporative cooling. Varied effectiveness, including convective heat coefficient, heat reclamation ratio, and thermal impedance, were evaluated using deionized water, fluorinert compound-72, hydrofluoroether-7200, and isopropanol as thermofluids under heat supply from 30 to 110 W at 20 W intervals. Myristic acid served as phase change material, and charging and discharging aspects with the implications of vaporized thermofluids were assessed. Findings suggest that fluorinert compound-72 affords the highest convective heat coefficient, heat reclamation ratio, and minimized thermal impedance at 110 W: 242.4 W/(m2·K), 99.2 %, and 0.28 K/W. Setup configuration, mass discharge rate, and thermofluid characteristics are causes of outcomes. A maximum thermal power reserve in phase change material is 10.8 W when employing fluorinert compound-72 at a high heat supply. This is owing to faster nucleation and minimal supercooling, which results in a higher mass discharge rate and rapid equilibrium temperature. The discrepancy between phase change material’s experimental and actual thermal power reserve was computed as error efficiency for all thermofluids. A feasible maximum exergy efficiency was identified as 4.6 % for deionized water at 30 W due to a higher temperature gradient and reduced heat reclamation ratio.