직사각형 휜이 부착된 수직원통형 축열조에서 응고과정시 열전달 특성에 관한 연구

초록

The intend of this study is to improve heat transfer by attaching rectangular fins to tube. Experiments were carried out under the following conditions-Aspect ratio(Wf/Rt) is 0.7, 1.2, 1.8. Temperature conversion between high part and low part of water in the thermal storage appeared because maximum density point of water is about 4℃ and inlet direction of working fluid influenced conductive heat transfer. Compared with the unfinned tube, the rectangular tube increased the ice thermal storage energy and the ice thermal storage energy was increased as aspect ratio was increased.