• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.11 no.6
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• pp.758-765
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• 1999

The estimation of reasonable amount of domestic cold water and hot water supplies in apartment houses is very important for the economical design of domestic cold water and hot water supply system which include pumps, boilers, heat exchangers, and various water reservoirs. To suggest the model of predicting reasonable amount of domestic cold water and hot water supplies, residents and actual domestic cold water and hot water consumption have been investigated for 740 apartment houses in Seoul and Bun-Dang, Kyunggi-Do. The model is suggested as a function of exclusive area of the apartment house and results of the model show generally good agreement with published data.

• Journal of the Korean Solar Energy Society
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• v.26 no.2
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• pp.103-109
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• 2006

The Purpose of this work is to investigate a long-term thermal performance of active solar hot water heating system for the dormitory of university. For this, monitering system including temperature sensors, flow-meters was installed in this system. Measurement was continued for 13 months between April 1st 2004 and May 31th 2005. As results, hot water demand, daily and monthly hot water load distribution which are necessary for the solar system design were suggested. Also thermal stratification in solar buffer tank was observed in the point of increasement of system efficiency. The yearly solar fraction and system efficiency of this system are about 29.5% and 44.9% respectively.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.23 no.5
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• pp.361-377
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• 1994

• Transactions of the Korean Society of Mechanical Engineers B
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• v.38 no.2
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• pp.191-196
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• 2014

The solar water heating system is one of the seven green campus items installed at the Gangneung campus of Gangneung-Wonju National University. The solar water heating system has two types of solar collectors, four storage tanks and monitoring equipment. Fixed and azimuth-tracking solar collectors were installed to collect heat from the sun. The amount of heat collected by the two different types of solar collectors was calculated from the temperature of the monitored storage tanks. Our results showed that the amount of solar heat collected by the azimuth-tracking solar collector was 19% greater on a sunny day and 23% greater on a rainy day than that collected by the fixed solar collector; therefore, the azimuth-tracking solar collectors are, on an average, 21% more efficient than the fixed solar collectors.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.28 no.4
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• pp.276-289
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• 1999

최근 들어, 생활수준의 향상과 인구의 증가로 인하여 서울 주변에는 위성도시가 건설되고 이러한 위성도시의 완성으로 공동주거(아파트)의 관심은 날로 높아져 가며, 생활양식의 변화로 인하여 건축물에서 생활용수의 사용량이 급격히 증가하고 있다.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.44 no.6
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• pp.36-46
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• 2015

• Journal of the Korean housing association
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• v.19 no.1
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• pp.79-88
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• 2008

Hot water is used by having a wash, dishes, taking tub and drinking water in residential buildings, and the use objective is to raise comfort of human body sense, washing and sterilization effect and so on. Cold & hot water supply system is understanded simpler than HVAC systems relatively, so it is true that pace of performance improvement is slower than other systems for plan and technical development. In this study, the performance evaluations are conducted under the condition of composition ratio by 1:1 for cold & hot water supply manifold system using functionally complex valves such as constant flow regulating valve and 3-way mixing valve in the area of $105.6m^2$ apartment which consist of the largest part of the whole apartment. Also, flow rate related to simultaneous use of faucets and change of hot water temperature are compared with the existing method.

• Journal of the Korean Solar Energy Society
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• v.31 no.5
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• pp.140-145
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• 2011

In this study, the performance and behavior of solar heating system according to the system control scheme, variable flow control (proportional control) and constant flow control (on-off control) was carried out by experiment. The on-off control is used generally for solar thermal system by now. But the proportional control is used for the solar district heating system which is supplied the higher temperature of water than that of desired. The proportional control logic that pump speed is varied in an attempt to maintain a specified outlet temperature of solar heating system was developed and tested for the use widely for the small and medium solar thermal system. The results are as following. First, the proportional controller which is made here could be adopted the characteristics for setting temperature control. Second, the proportional control is better than the on-off control in the side of the performance of thermal stratification in storage tank. Third, the operating energy(electricity consumption by pump) of solar thermal system can be saved more than 60% using the proportional control comparing to the on-off control.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1078_1079
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• 2009

본 논문에서는 태양열 온수급탕에 관한 모티너링 연구를 해석하고 이론을 바탕으로 실 시스템을 적용 운용시 시스템의 운전특성을 비교 분석하였다. 장기 적인 일사량 측정 데이터 수집을 통하여 그래프화, 모티터링 시스템에 관한 연구를 살펴보았다.

• 월간 기계설비
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• s.233
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• pp.55-57
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• 2009

국토해양부는 지난 10월 20일 20가구 이상의 공동주택을 건설할 경우 총에너지를 종전보다 10~15% 이상 절감토록 하는 내용의 '친환경 주택의 건설기준 및 성능'을 고시하고 이날부터 시행에 들어갔다. 국토부는 친환경적인 주택 건설을 위한 제도적 기반을 구축하기 위해 에너지 소비절감 및 탄소배출량 감소를 위한 에너지절약형 친환경 주택의 건설기준 및 성능을 마련한 것이다. 이 고시는 친환경 주택으로 인정받기 위한 필수시설 및 각각의 설치기준 제시와 에너지 사용용도에 따라 난방, 급탕, 전력, 열원 등 4개로 분류하는 친환경주택 성능 평가방법 등을 규정했다.