• Journal of Energy Engineering
• /
• v.21 no.4
• /
• pp.435-443
• /
• 2012

The combination of space shortage and the high population density concentrated in urban areas of South Korea has resulted in the growth of large-scale high-rise residential complexes, naturally affecting water and hot water usage patterns as well. But the current designs for water and hot water supply in South Korea rely mostly on international design standards and data calculated on site due to the severe shortage of basic data in relation to actual use, which result in the frequent problem of the under-or over-design of water and hot water supply. The following study measures the hot water supplier's conditions and the user's heat usage to realize the amount of time required for hot water supply load generation and the pattern of actual use in order to create basic data for effective hot water supply facility design and maintenance.

• Journal of the Korean housing association
• /
• v.19 no.1
• /
• pp.79-88
• /
• 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 housing association
• /
• v.19 no.5
• /
• pp.111-120
• /
• 2008

The aim of this study is to present the design methods about manifold location being installed and size and to draw out the proper piping size as comparing the fluctuation of discharge with manifold size and residence size through the piping network analysis, when using the same faucet in accordance. The findings are summarized as follows, 1) an appropriate header main body pipe diameter was deemed to be $32{\sim}50\;mm$. 2) the research presented design measures for the application of appropriate water supply inlet pipe diameters according to residential buildings with various sizes. 3) the header direct branch piping method is ideal for small and medium-sized residential complexes, and the header branching and semi header methods are deemed to be more favorable for large residential complexes. 4) this study offered design measures for appropriate header system main body pipe diameters, water supply inlet pipe diameters, header system piping methods, application methods for functional auxiliary equipment units, and header system installation spaces and location.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.19 no.12
• /
• pp.857-864
• /
• 2007

In the current residential building, hot water supply system consumes the second largest energy in order to make the thermal comport condition of residential space. The more residential environment improves the more the demand for hot water and water consumption is increasing gradually. So this study examines the possibility of applying the recirculation for individual hot water supply system compared with the existing method for waiting time for hot water, wasted water and energy consumption. The results are as follows. (1) In case of recirculation system method the waiting time for hot water can be reduced up to $69\sim85%$ in spring and fall period and so dose up to $77\sim85%$ in winter period. (2) The total wasted water has a little change compared with the existing method which can make the total wasted water reduced about $77\sim86%$. (3) The efficiency of hot water supply system can be improved, if the method which blocks the inflow of cold water is applied, when return pump is operated to recirculate hot water in recirculation system.

• Proceedings of the SAREK Conference
• /
• 2005.06a
• /
• pp.178-178
• /
• 2005

• Proceedings of the SAREK Conference
• /
• 2007.06a
• /
• pp.186-186
• /
• 2007

• Journal of the Korean housing association
• /
• v.16 no.2
• /
• pp.75-82
• /
• 2005

The High-rise Residential Buildings are recently consuming a lot of energy because of the vertical height rise in case of supplying cold and hot water. It is required to a appropriate solution in occurring discomfortable use and unexpected conditions of High-rise Residential Buildings on account of the difference of water supply pressure on top and bottom floor, faucet outlet pressure rise. Thus, the purpose of this study is to research on practical use status of Cold and Hot Water Supply System through Question Survey in High-rise Residential Buildings and to analyze problems.

• Solar Energy
• /
• v.11 no.1
• /
• pp.16-26
• /
• 1991

This paper studies development of a solar thermosyphon hot water system which is suitable to korean climate and life style, to save energy consumed for domestic water heating. The system consists of two flat plate collectors(or three flat plate collectors) connected in parallel and a storage tank of 300 liter capacity with heat exchanger and the optimum system was designed through the comparative measurements of five different storage tanks. The developed system manufactured with domestic materials were installed in residential buildings in seven cities(Seoul, Pusan, Taegu, Kwangju, Taejeon, Kangneung, Cheju) for demonstration and field test and results show possibility for commercialization.

• Journal of the Architectural Institute of Korea Structure & Construction
• /
• v.34 no.5
• /
• pp.51-58
• /
• 2018

The purpose of this study was to analyze the effect of seasonal change in characteristics of hygiene activity on domestic hot water energy consumption. With 16 residents of 4 households, the data about frequency of hygiene activity and water temperature was collected from February to August, 2017. The results of collected data discovered that the frequency of hygiene activity was higher especially in summer, whereas the consumption of warm water they used was higher in winter. The seasonal change in characteristics of hygiene activity was analyzed to be changed and strongly influenced by outdoor temperature. The influence of characteristics of hygiene activity on hot water consumption was analyzed. There was 13% of difference between consumption that was calculated taking characteristics of hygiene activity into account and consumption that was not. Therefore, this study suggested hygiene activity schedule, hot water profile and hot water consumption pattern, which can be utilized for improving simulation as well.

• 월간 기계설비
• /
• s.88
• /
• pp.92-107
• /
• 1997

최근의 건축설비는 업무효율을 향상을 위한 기능뿐만 아니라 쾌적한 주거 환경을 보장하기 위한 감성 설계를 중시하게 되었다. 이에 본 난에서는 최적 건축설비 관리를 위한 배관의 설계에서부터 시공, 유지보수에 이르기까지 관련 기술규격을 바탕으로 설명하고자 한다. 건축용 배관에는 급수 및 급탕설비, 위생설비를 포함한 배수설비, 공기조화용 냉난방 설비, 가스설비 및 소화설비용 배관으로 크게 분류할 수 있다. 본 장에서는 건축용 배관중에서 공기조화용 난방설비를 위주로 설명하고자 한다.