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남현규(Hyeon Gyu Nam),장미순(Mi Soon Jang),서경춘(Kyoung Chun Seo),남기호(Ki Ho Nam),박희연(Hee Yeon Park) 한국식품저장유통학회 2013 한국식품저장유통학회지 Vol.20 No.3
This study was conducted to investigate changes in the physicochemical properties (proximate compounds, reducing sugar, organic acid, ATP and related compounds, and free amino acid) of beachu kimchi (BK) with octopus, abalong, squid and webfoot octopus added during its storage at 4℃ for 35 days. The crude protein content of the seafood Kimchi, 1.98~3.41%, was higher than that of the BK. The organic acid level did not significantly differ in the four kinds of seafood during their fermentation, and their malate and succinate contents decreased while their lactate content increased. The levels of the ATP and related compound substances of the hypoxanthine contents were high but decreased during their fermentation. However, 3.40 μmol/g of IMP was detected in the Kimchi with octopus added; 0.67 μmol/g in the Kimchi with abalone added; and 1.80 μmol/g in the Kimchi with squid added after they were fermented for 21 das, but the same were not detected in the BK. The taurine and γ-amino-n-butyric acid contents of the free amino acids in the seafood Kimchi were approximately two to 10 times and 1.5 to three times higher than in the BK, respectively.
남현규(Hyun-Kyu Nam),배철호(Cheol-Ho Bai) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.4
A characteristic behavior of the thermal storage tank for varying thermal load in heat pump water heater was studied. The control method was suggested and applied. By measuring the temperature within the storage tank, the heat pump was ON/OFF controlled. The appropriate measuring position and the size of heat exchanger gives the minimized power consumption of heat pump. As the length of heat exchanger increases, the temperature measuring position goes down of the storage tank and the power consumption increases.
대체냉매 R436B를 적용한 정수기 냉각수 시스템 신뢰성 평가에 관한 연구
남현규(Hyun-Kyu Nam),배상은(Sangeun Bai),배철호(Cheol-Ho Bai),고정수(Jung-Su Ko),진병주(Byung-Joo Jin),오주철(Ju-Chul Oh) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.8
The alternative refrigerant R436B is applied, to assess the application feasibility for a commercial cooling water system. The characteristic stability was verified by Sealed glass tube test and Autoclave test. R436B is chemically stable with the compressor material. The Oil miscibility test shows the usual compressor oil mixed well with R436B. Through the life acceleration test, the cooling performance is maintained. Though slight changes in oil and capillary tube diameter were found, they were within the permitted range. R436B should be applied to commercial cooling water systems as a simple replacement for the usual refrigerant.
박근우(Park, Geun-Woo),남현규(Nam, Hyun-Ku),강병찬(Kang, Byung-Chan) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Effluent ground water overflow in deep and broad ground space building. Temperature of effluent ground water is in 12{sim}20?C annually and the quality of that water is as good as living water. Therefore if the flow rate of effluent ground water is sufficient as source of heat pump, that is good heat source and heat sink of heat pump. Effuent ground water contain the thermal energy of surrounding ground. So this is a new application of ground source heat pump. In this study open type and c lose type heat pump system using effluent ground water was installed and tested for it church building with large and deep ground space. The effluent flow rate of this building is 800{sim}1000 ton/day. The heat pump capacity is 5RT each. The heat pump cooling COP is 4.9{sim}5.2 for the open type and 4.9{sim}5.7 for close type system. The system cooling COP is 3.2{sim}4.5 for open type and 3.8{sim}4.2for close type system. This performance is up to that of BHE type ground source heat pump.
박근우(Park, Geun-Woo),남현규(Nam, Hyun-Ku),강병찬(Kang, Byung-Chan) 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.4
Effluent ground water overflow in deep and broad ground space building. Temperature of effluent ground water is in 12{sim}20?C annually and the quality of that water is as good as living water. Therefore if the flow rate of effluent ground water is sufficient as source of heat pump, that is good heat source and heat sink of heat pump. Effluent ground water contain the thermal energy of surrounding ground. So this is a new application of ground source heat pump. In this study open type and close type heat pump system using effluent ground water was installed and tested for a church building with large and deep ground space. The effluent flow rate of this building is 800{sim}1000ton/day. The heat pump capacity is 5RT each. The heat pump cooling COP is 4.9{sim}5.2 for the open type and 4.9{sim}5.7 for close type system. The system cooling COP is 3.2{sim}4.5 for open type and 3.8{sim}4.2 for close type system. This performance is up to that of BHE type ground source heat pump.