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양수영(S. Y. Yang),박재성(J. S. Park),정호윤(H. Y. Jung),이연원(Y. W. Lee) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The frost generation of a household refrigerator is closely related to the distributions of temperature inside its compartments, such distributions are depends on the cold air circulation inside the refrigerator. So its frost can be reduced and energy consumption efficiency improved through optimization of air flow fields inside the freezing room. In this work, numerical simulations have been carried that used to measure velocity fields inside the freezing room of 3D B/F refrigerator. Numerical results show air flow in the freezing room. The object of numerical analysis is to compared with an experimental values. So the variation of the temperature at the wall was measured and carried out a quantitative analysis of frost generated from freezing compartment. The results of experiment was satisfied that values agreed with numerical analysis.
이영환(Y. H. Lee),이연원(Y. W. Lee) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This paper focuses on the simulation and characteristics of cold flow in the freezer of a household refrigerator. This flow field has been simulated with the standard κ-ε turbulence model by using 3-dimensional, steady and incompressible flow. It has been computed with door closing. And, we could find supercooled regions that vapor density rise. It is considered that deflections of temperature and velocity resulted from supercooled area in the freezer promote inflow moisture with door opening, as the results, heat and mass transfer in the freezer is fostered by the inflow moisture. At the same time, improvement plan and experiment based on these flow simulation were performed and examined successfully.
이영환(Y. H. Lee),이연원(Y. W. Lee) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This paper focuses on the experiments to minimize freezing phenomena in the freezer of a household refrigerator. In the climate chamber, frosting characteristics and freezing phenomena in the freezer was investigated experimentally. Also, we performed the. experiments to find operation characteristics of refrigerator and measure freezing accumulation inside the freezer compartments with door opening and closing. The freezing accumulation measured much on grille fan, ceiling, shelf, left and right wall in order. At the same time, improvement plan and experiment based on these experiments were performed and examined successfully.
Stand type 김치냉장고 상단부의 열전달 및 유동득성
한호윤(H. R. Han),김윤규(K. Y. Kim),정호윤(H. Y. Jung),최윤환(Y. H. Choi),이연원(Y. W. Lee) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
Kimchi refrigerator, as one of the necessary production is widely used in domestic. In this paper, authers are focused on decrease of temperature variation using by the force convection of the stand type Kimchi refrigerator. The temperature variation is about 1°C on both left and right sides in Kimchi refrigerator. And the temperature variation is between 1 to 2℃ on top and bottom in Kimchi Refrigerator. Cooling fluid flow in the gap, which was among the boxes of the top, middle and bottom are not smooth in cooling fluid flow. It was observed that the recycling area under the bottom of the evaporator. It's also observed that useless area of the fluid flow for the cooling recycling system.