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논문 기본 정보

자료유형
학술대회자료
저자정보
장지영 (LG전자) 이상헌 (LG전자) 김병순 (LG전자)
저널정보
대한설비공학회 대한설비공학회 학술발표대회논문집 대한설비공학회 2013년도 하계학술발표대회
발행연도
2013.6
수록면
193 - 196 (4page)

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초록· 키워드

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At certain outside air conditions, when air-source heat pump operates in heating mode, frost can form on the air-cooled heat exchanger, decreasing the heating performance. Conventionally, reverse-cycle defrosting (RCD) has been the common method of frost removal. But this method requires the interruption of heating during defrosting, as well as a period of time to reheat the cooled pipes of the indoor units after defrosting. In this study, a new technology called continuous heating was developed, which utilize only a hot gas bypass valve to remove the frost from the outdoor heat exchanger and thus enabling the supply of hot air to indoors without any interruption. For this, a new high temperature and low pressure gas bypass method was designed, which is differentiated from the common high pressure hot gas bypass methods by its use of low pressure. Various refrigerant mass flow distributions were examined, and the most effective defrosting mass flow was 50% in this case. Heating capacity was increased by 17% because of continuous heating, and the cumulated energy efficiency was increased by 8% compared to the traditional reverse cycle defrosting over 4 hours including two defrost operations. Also, cumulated energy efficiency was increased by 27% compared to electronic heaters that supply the same heating capacity during defrosting

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ABSTRACT
1. 서론
2. 실험장치 및 방법
3. 실험결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2014-550-003182107