Abstract
It is necessary to develop an effective technology used of the waste energy exhausted at the same time as generation of electric power for popularizing the distributed power supply system, for example, Micro Gas Turbine System, or Fuel Cell System. The thermal storage function is more indispensable for a highly effective operating of distributed system because the demand fluctuation of heat is very large than electricity. In this study, two kinds of the plate fin heat exchanger enclosed the phase change material (PCM) were used as the compact thermal storage unit. Two kinds of PCM (Phase Change Material) were used, which are Sodium acetate trihydrate with a melting point of about 58 C and Paraffin wax with a melting point of about 74.8 C. Here, we made comparison with experimental value and calculated value by the developed numerical simulation for dynamic characteristics in heat charging and discharging of small thermal storage unit. As a result, it was shown that an analytical method in which the latent heat of PCM was considered with total specific heat was effecitve as the numerical analysis model.
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