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윤영중(Young Jung Yun),이재헌(Jae Heon Lee),김용모(Yong mo Kim),홍기상(Gi Sang Hong) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.11
Geothermal air conditioning system is a combination of equipment that supplies cooling using Ground Source Heat Pump Equipment Features of geothermal cooling system supplies the cooling for the building by using a constant temperature throughout the year of the earth. This study estimates the cooling energy consumption by using the data collected using flow rate, supply temperature, return temperature, outdoor temperature and the accumulated amount of power from January 2013 December 2015. Geothermal cooling system is consistent with the expected maximum demand of air conditioning and installation of a geothermal cooling system for the resort season in the resort.
이온교환막 연료전지용 막 가습기의 운전 조건에 따른 성능 실험
배호준(Bae, Ho-June),김용모(Kim, Yong-Mo),이영덕(Lee, Young-Duk),유상석(Yu, Sang-Seok) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
The efficiency and life time of the proton exchange membrane (PEM) fuel cell system is critically changed with its humidity which should be maintained properly during dynamic operation. Membrane humidifier is required to regulate proper humidity level for the design point of the PEMFC system. In this study, we presented the performance of the cylindrical membrane humidifier which is operated as water-to-gas. Dry air pressure, liquid water flow temperature, and air flow rate were chosen as the operating parameters. Humidity level is expressed with dew point.
김호근(Ho-Keum Kim),김한석(Han-Seok Kim),안국영(Kook-Young Ahn),김용모(Yong-Mo Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
CO₂ is a well-known green house gas, which is the major source of global wanning. Many<br/> researchers have studied to reduce CO₂ emission in combustion processes. Among the method for reducing CO₂ emission, oxygen-enriched combustion has been proposed. But the adiabatic name temperature is too high. So existing facilities must be changed, or the adiabatic name temperature in the combustion zone should be reduced. The combustion characteristics, composition in the name zone, temperature profile and emission gases were studied experimentally for the various oxygen-enriched ratios(OER) by addition of CO₂ under constant O₂ flowrate. Results showed that the reaction zone was quenched, broadened, as addition of CO₂ was increased. Temperature has a large effect on the<br/> NOx emission. The emission of NOx in flue gas decreased due to the decreased temperature of<br/> reaction zone. It was also shown that the reaction was delayed by the cooling effect As the addition of CO₂ was increased, the composition of CO in the name zone increased due to the increase of reaction rate by increasing mixing effect of oxidant/fuel at OER=O, but the composition of CO decreased by quenching effect at OER=50 and 100%.
산소부화연소에서 Co<sub>2</sub> 첨가에 대한 연소 특성
김한석,김호근,안국영,김용모,Kim, Han-Seok,Kim, Ho-Keun,Ahn, Kook-Young,Kim, Yong-Mo 대한기계학회 2004 大韓機械學會論文集B Vol.28 No.1
$CO_2$ is a well-known green house gas as well as the major source of global warming. Many researchers have studied to reduce $CO_2$ emission in combustion processes. Among the method for reducing $CO_2$ emission, oxygen-enriched combustion has been proposed. Because its adiabatic flame temperature is relatively too high, existing facilities must be changed or the flame temperature in the combustion zone should be reduced. The combustion characteristics, composition in the flame zone, temperature profile and emission gases were investigated experimentally for the various oxygen-enriched ratios(OER) by the addition of $CO_2$, under constant $O_2$ flow rate. Results showed that the reaction zone was quenched and broadened as the addition of $CO_2$ was increased. The emission of NOx in flue gas was decreased as decreasing temperature in reaction zone. It was also shown that the reaction was delayed by the cooling effect. As the addition of $CO_2$ was increased, the composition of CO in the flame zone was increased due to the increase of reaction rate by increasing mixing effect of oxidant/fuel at OER=0%, but the composition of CO was decreased by quenching effect at OER=50% and 100%.
소형 모듈 스택을 이용한 가정용 연료전지 성능의 실험적 고찰
최원석(Choi, Won-Seok),김용모(Kim, Yong-Mo),유상석(Yu, Sang-Seok),이영덕(Lee, Young-Duk),홍동진(Hong, Dong-Jin),안국영(Ahn, Kook-Young) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
Proton Exchange Membrane Fuel Cell (PEMFC) is an attractive candidate for residential power generator due to fast start-up and stop, high efficiency, low emission, and high power density. In this study, we employ short module stack to understand the performance of the unit cell of the stack in terms of operating temperatures. To simulate the practical fuel cell stack of residential power generator, the structure and active area of the short module stack is kept the same as that of the practical fuel cell. The results shows that the electric potential of short module stack is different from the number of cells times the potential of unit cell because of cell-to-cell variation.
김호근(Ho-Keun Kim),이상민(Sang-Min Lee),김한석(Han-Seok Kim),안국영(Kook-Young Ahn),김용모(Yong-Mo Kim) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
The Flame length of CH₄ with the Oxidizer of air and O₂ has been measured respectively for the nozzle diameter of 1.6㎜, 2.7㎜, 4.4㎜ and 7.7㎜. In all CH₄ flame on oxidizer of air and O₂, the flame length was independent of the initial jet diameter, dependent only on the flowrate in laminar flame regime, and in turbulent flame dependent on the initial jet diameter. Using correlation equation of Dellchatslos, the flame length has been expected exactly for CH₄/air flame, but has been underestimated for CH₄/O₂ flame. This paper has proposed correlation equation of CH₄/O₂ flame.