• Title/Summary/Keyword: drain condenser

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A Study on the Temperature Characteristics at the Inlet and the Outlet Pipes of a Refrigerator Drain Condenser (냉장고 배출수 응축기 입출구 배관에서의 온도 특성에 관한 연구)

  • Ha, Ji Soo;Kim, Tae Kwon
    • Journal of Energy Engineering
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    • v.23 no.4
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    • pp.247-255
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    • 2014
  • The present study was conducted to elucidate the characteristics of temperature at the inlet and outlet pipes of a refrigerator drain condenser and suggest the method to predict the temperature of the refrigerant at the inlet and outlet pipes of the drain condenser. For this purpose, a built in style refrigerator was installed in a constant temperature chamber to measure temperatures at the inlet and outlet pipes of the drain condenser. From the results of the present analysis, it could be seen that the measured temperatures changed from $37^{\circ}C$ to $46^{\circ}C$ and the actual refrigerant temperatures were higher than the measured temperatures with the difference magnitude of $8^{\circ}C$ to $22^{\circ}C$. The present study suggested that the temperatures of the refrigerator could be calculated with the measured temperatures by introducing curve fitting of the measured temperature. The predicted refrigerant temperatures by the present study had the accuracy within 6% error of the actual refrigerant temperatures.

Inrush Current Suppression Method of the Reactive Power Compensator by using a Linear Region of the Switch (스위치의 선형영역을 이용한 무효전력보상기의 돌입전류 억제 방안)

  • Park, Seong-Mi;Kang, Seong-Hyun;Park, Sung-Jun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.3
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    • pp.55-64
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    • 2013
  • In this paper, a new topology which can add a small reactor in series to a condenser-bank type reactive power compensator to limit current is proposed. And also the proposed topology can add or remove a power condenser safely without any addition of inrush-current suppression resistance. The proposed method tests variable resistance of the drain source of a switching device which is controlled by gate voltage in a two-way switch with a diode rectifier and FET switch. In other words, the proposed method is a inrush-current suppression method with the structure of variable resistance. In particular, the proposed method creates smooth current without any resonance in inrush-current as well as is not limited by the time of switch on and off.