| Title |
A Study on the Characteristic of Heat Transfer of PCM(Phase Change Material) at the Simultaneous Charging and Discharging Condition |
| Authors |
Donggyu Lee ; Sechang Park ; Dong-yeol Chung ; Cheadong Kang |
| DOI |
http://dx.doi.org/10.6110/KJACR.2016.28.8.305 |
| Keywords |
상변화물질 ; 자연대류 ; 동시의 ; 축/방열 ; 전산유동해석 Phase change material ; Natural convection ; Simultaneous ; Charging and discharging ; Computational fluid dynamics |
| Abstract |
A thermal storage systems was designed to correspond to the temporal or quantitative variation in the thermal energy demand, and most of its heat is stored using the latent and sensible heat of the heat storage material. The heat storage method using latent heat has a very complex phenomenon for heat transfer and thermal behavior because it is accompanied by a phase change in the course of heating/cooling of the heat storage material. Therefore, many studies have been conducted to produce an experimentally accessible as well as numerical approach to confirm the heat transfer and thermal behavior of phase change materials. The purpose of this study was to investigate the problems encountered during the actual heat transfer from an internal storage tank through simulation of the process of storing and utilizing thermal energy from the thermal storage tank containing charged PCM. This study used analysis methods to investigate the heat transfer characteristics of the PCM with simultaneous heating/cooling conditions in the rectangular space simulating the thermal storage tank. A numerical analysis was carried out in a state considering natural convection using the ANSYS FLUENT® program. The result indicates that the slope of the liquid-solid interface in the analysis field changed according to the temperature difference between the heating surface and cooling surface. |