The document presents the results of an experimental study on latent thermal energy heat exchangers using paraffin wax as the phase change material (PCM) and air as the heat transfer fluid. Two heat exchanger designs were tested: a tubular heat exchanger with a single PCM storage tube, and a compact heat exchanger model based on an automobile radiator. The experiments analyzed parameters like charging and discharging durations, temperature profiles of the inlet and outlet air, and temperature distribution within the PCM. While the tubular design showed the influence of operating parameters on performance, the compact design demonstrated higher heat transfer but incomplete melting within the PCM due to its low thermal conductivity.