| Title |
Analysis of Roving Personal Air Conditioning Using Phase Change Material |
| Authors |
Huy Hai Nguyen ; Xuan Quang Duong ; Seung Soo Lee ; Jae Dong Chung |
| DOI |
https://doi.org/10.6110/KJACR.2021.33.8.369 |
| Keywords |
상변화 물질; 이상유동; 유효 열전도계수; 에어컨 Phase change material; Two phase flow; Effective thermal conductivity; Roving personal air-conditioner |
| Abstract |
This study aimed to estimate the performance of a storage cooling system for roving personal air conditioning where a phase change material (PCM) was used as a condenser. The modeling on direct expansion air conditioning requires two-phase analysis. We applied 1-D two phase flow method for refrigerant inside tubes and effective thermal conductivity model outside tubes for PCM. Results were compared with those of a previous experience model which assumed a fixed ratio of super-heating region (10%), two-phase region (80%), and sub-cooling region (10%). The desired system discharge power was 600 Wh. Results showed that the previous experience method had an over-estimated performance due to the assumption of constant temperature applied over whole tube length while the current model coupled with 1-D two phase model and effective thermal conductivity model could cover the detailed heat transfer involved in the roving personal air-conditioning including developing a two-phase region. |