http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정용호(Yong-Ho Jung),장현재(Hyun-Jae Chang),서장후(Jang-Hoo Seo) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.2
In this study, a cold aisle containment system was proposed among various strategies to reduce the energy waste by recirculation air from the hot aisle. To verify the effectiveness of the cold aisle containment system, a test bed which is similar to an actually existing server room was set up in the Internet Data Center(IDC) building. Comparative experiments, conventional open type cooling system and cold aisle containment system were carried out under actual conditions. The result revealed that the range of inlet temperature of the server system was 20~ 25℃ in an existing cooling system and the range of inlet temperature dropped below 20℃ by the cold aisle containment system. After all, cold aisle containment system was proved to be the solution for energy saving cooling system.
정용호(Jung, Yong-Ho) 한국건축친환경설비학회 2012 한국건축친환경설비학회 논문집 Vol.6 No.1
Energy Cost has been rapidly increased with the internal heat gain of data center to keep the temperature condition. But the cooling units for server systems are fully operated to satisfy the indoor temperature condition, it results in the excessive energy consumption. In this study, various cooling systems were studied for data center and cold aisle containment system was proved to be the best solution for server cooling system. Because it protects the cooling zone from the hot aisle space. Effective cooling and prohibition of recirculation air from hot aisle was possible by the cold aisle containment system.
데이터센터의 냉방에너지 절감을 위한 냉각시스템 분석 및 개선 방안
정용호(Jung, Yong-Ho) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.11
Energy Cost has been rapidly increased with the internal heat gain of data center to keep the temperature condition. But the cooling units for server systems are fully operated to satisfy the indoor temperature condition, it results in the excessive energy consumption. In this study, various cooling systems were studied for data center and cold aisle containment system was proved to be the best solution for server cooling system. Because it protects the cooling zone from the hot aisle space. Effective cooling and prohibition of recirculation air from hot aisle was possible by the cold aisle containment system
태양집열창방식 자연환기시스템에 의한 실내 환기효율 예측
정용호(Jung Yong-Ho) 한국건축친환경설비학회 2008 한국건축친환경설비학회 논문집 Vol.2 No.1
This study estimates ventilation efficiency for apartment using solar radiation in order to improve energy savings and indoor air environment. Field measurements were performed in a full-scale mock-up model. A solar collection device and ordinary device for natural ventilation were installed in each room. Temperature and airflow velocity were monitored in each five minutes. Solar radiation and daylight illuminance were also measured. The concentration of indoor air for two conditions was monitored using a multi-gas monitor and tracer gas. The air change rates per hour(ACH) under the conditions were computed based on the concentrations. The air change rates per hour (ACH) using solar radiation exceeded the required air change rate per hour was linearly proportional to the solar radiation. The ventilation device using solar radiation contributed to provide better thermal environment with energy savings. From the result of ventilation efficiency prediction for the 85㎡ area of practical residential building by CFD simulation. it was found that average age of air was 90.3min, nominal time constant was 82.9min. So total average ventilation efficiency was 0.918, this value means about 92% of indoor air could be mixed.
PTC 서미스터 기능을 이용한 전기온돌시스템의 성능 평가
정용호(Jung, Yong-Ho) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.3
The number of apartment houses is recently increasing and various heating methods are adopted for the indoor heating in the apartment house in Korea. Ondol which is the radiation floor heating system is the most popular heating system among the various methods. The users and engineers have a fixed idea about the construction and operation method of Ondol caused from an experience of use of the Goodle(a Korean traditional heating system). So many users and engineers use the Ondol system which has high heat capacity and heavy weight. Therefore many problems are occurred because of heavy weight of Ondol such as energy waste due to high heat capacity, increasing of construction cost and difficulty of remodeling and maintenance. This is a preliminary study for the development of the prefab Electric Ondol system using PTC thermistor function. The aims of this study are reducing energy waste due to excessive thermal storage of Ondol, the development of an Ondol system that is easy to maintain and to reduce the weight of Ondol structure. As the results, electric energy consumption per hour of electric ondol system was 1.32∼1.48kwh per hour, 1.62∼1.77kwh per hour in traditional ondol system. Total electric energy consumption for 6 hours was 8.34kw in electric ondol system and 10.21kw in in traditional ondol system. After all, 18.4% of energy saving could be achieved. This result was caused by PTC thermistor function.
정용호(Yong-Ho Jung),박성룡(Seong-Ryong Park) 대한설비공학회 2017 설비공학 논문집 Vol.29 No.1
The summer climate is very hot and humid in Korea. The humidity is an important factor in determining thermal comfort. Recently, the research for dehumidification device development has been attempted to save energy that is required for the operation of the current dehumidifiers on the market. Existing dehumidification systems have disadvantages such as wasting energy to drive a compressor. Meanwhile, dehumidification systems with membranes can dehumidify humid air without increasing the dry bulb temperature so it doesn’t have to consume cooling energy. In this paper, the cooling energy savings was studied when a dehumidification system was applied in a model building instead of a chiller. The sensible heat load was almost the same result, but the latent heat load was decreased by 38.9% and the total heat load was decreased by 8.5%. As a result, electric energy used to drive the compressor in a chiller was saved by applying a membrane airconditioning system instead.