Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)
- 2009.06a
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- Pages.804-809
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- 2009
Frost Formation on a Cylinder under Heat Pump Condition
히트펌프 조건의 원형관에서의 착상에 관한 연구
- Yoon, Shin-Hyuk (Graduate school, Sungkyunkwan University) ;
- Cho, Keum-Nam (School of Mechanical Engineering, Sungkyunkwan University) ;
- Hayase, Gaku (System Appliances Division, Samsung Electronics Co., Ltd)
- Published : 2009.06.25
Abstract
The present study measured frost pattern on a cylinder to propose empirical correlation equations for the local and average frost thickness, frost density and frost mass. The key parameters were diameter of the cylinders (7mm, 20mm), cooling surface temperature of the circular tube, absolute humidity of air, air temperature and air velocity. A 50% ethylene glycol aqueous solution was applied as a coolant. The frost thicknesses at both front and rear were larger than those at the other parts, while they were increased as diameter of the cylinder was increased. The local frost thicknesses at high air velocity were more uniform than those at low air velocity. The values predicted by Kim et al. under the freezer condition showed larger by the maximum of