다중수원 용수공급시스템을 위한 동적 시뮬레이션 모형의 개발

김영화 ( Younghwa Kim ),박수완 ( Suwan Park ),한국헌 ( Kukheon Han ),박현기 ( Hyungi Park ),조재용 ( Jaeyong Cho ),남호성 ( Hosung Nam ),정소연 ( So-yeon Jung ) 한국농공학회 2015 한국농공학회 학술대회초록집 Vol.2015 No.-

Associated with energy supply and demand issues it has been emphasized on energy use efficiency and economic feasibility in the development and operation of water supply systems. Efficiency of these water systems are closely related to the location and nature of the water resources. The water supply system using the long distant water resource from water user has a structural limitation of high energy loss in the process of supply and pumping. The water supply system using a nearby water resource can reduce the loss of water supply and energy costs, which lead to reduction of operating costs. However, the water resources located in the vicinity of water user have to secure many sources in the regions because they have small capacity of water supply generally. In this study the dynamic simulation model using System Dynamics (SD) has been developed to apply to the operational management of the water supply system utilizing multiple water sources. The scope of the modeling is from the intake source to the reservoir, not including water distribution network model after reservoir. Dynamic simulation models can simulate water level of the reservoir and pumping costs according to the basic flow and the pumping operation rules in reservoirs. Simulation factors include change of the reservoir volume and power price according to pumping operation rules in the reservoir. Development model is the virtual prototype model of multiple water sources of water supply systems and can be extended, even if the system is more complex. By applying this model to operation and management in the multiple water supply system, it is capable of pre-simulation, which enable the cost-effective operations management.

분산형 용수공급시스템 구축을 위한 정수처리시설 최적 위치 결정

장동일,하금률,강기훈,김정현,전환돈 대한상하수도학회 2013 상하수도학회지 Vol.27 No.1

Major issues in water supply service have changed from expansion of service area to improvement of service quality, i.e., water quality and safety, and early response to emergency situation. This change in the service concept triggers the perceptions of limitation with the current centralized water supply system and of necessities of decentralized (distributed) water supply system (DWSS), which can make up the limitations. DWSS can reduce the possibility of water supply outage by establishing multiple barriers such as emergency water supply system, and secure better water quality by locating treatment facilities neighboring consumers. On the other hand, fluctuation of water demand will be increased due to the reduced supply area, which makes difficult to promptly respond the fluctuating demand. In order to supplement this, hybrid water supply system was proposed,which combined DWSS with conventional water supply system using distributing reservoir to secure the stability of water supply. The Optimal connection point of DWSS to existing water supply network in urban area was determined by simulating a supply network using EPANET. Optimal location of decentralized water treatment plant (or connection point) is a nodal point where changes in pressure at other nodal points can be minimized. At the same time, the optimal point should be selected to minimize hydraulic retention time in supply network (water age) to secure proper water quality. In order to locate the point where these two criteria are satisfied optimally, Distance measure method, one of multi-criteria decision making was employed to integrate the two results having different dimensions. This methodology can be used as an efficient decision-support criterion for the location of treatment plant in decentralized water supply system.

급수설비 리모델링 시 부스터방식 적용에 관한 사례 연구

김성환(Kim Sung-Hwan),금종수(Kum Jong-Soo),김동규(Kim Dong-Gyu) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.2

In this study, Gravity tank water supply system used with general water supply facilities on apartment happens several problems as water pressure insufficiency of top floor, health control problem, external appearance of a building, establishment difficulty and construction cost etc. Therefore superior booster pump supply system is utilized and constructed instead of gravity tank water supply system at recent times on construction, economy, sanitation. But, it is difficult to evaluate exactly about maintenance aspect and consumer's satisfaction when apply booster pump supply system. This study presents that booster pump supply system reduces 60% to compare beginning cost of the construction which gravity tank water supply system and booster pump supply system are applied to apartment. Also, booster pump supply system reduces 10-20% to compare cost of maintenance and is more efficient than gravity tank water supply system. it is suggested to convert to booster pump supply system remodeling water supply system of apartment through this results.

상수도 급수방식 전환의 타당성 분석 및 최적 범위 산정모델 연구

박준열,신휘수,서지원,김기범,구자용 대한상하수도학회 2017 상하수도학회지 Vol.31 No.2

This study concerned the analysis on the efficiency of the conversion of water tank type supply system to direct water supply system to examine the feasibility of the conversion, as well as the calculation of optimal conversion range that enables the supply of safe, high-quality water at stable pressure in accordance with the standards of water supply facility. The results of this research showed that when converting water supply system from water tank type supply system to direct water supply system, more nodal points could be properly converted and more reduction of electricity usage was expected in case water pressure rather than residence time was fixed. This means that higher efficacy can be obtained by fixing water pressure when converting water supply system. However, since the number of the locations that received on-spot inspection was small and the electricity usage measured was not exclusively by water supply facility, it is difficult to judge that such reduction of electricity usage accurately represents reduced electricity usage by water supply facility alone. therefore, after having secured on-spot information about a larger number of locations in apartment complexes that have converted water supply system, and utilizing information about electricity usage exclusively by water supply facility, the proposed method of this research could be applied to accurately deducing expected reduction of electricity usage by water supply facilities of various other apartment complexes. It is also considered possible to deduce an effective operation method of water supply system by finding out an area that shows low pressure or low residual chlorine concentration in the optimal conversion range of water supply, followed by estimating the proper location of pumping station or the proper chlorine dosage at the power purification plant that supply water to the target area.

System Dynamic Modeling Approach to Water Supply System

Gunhui Chung,Joong Hoon Kim,김태웅 대한토목학회 2008 KSCE JOURNAL OF CIVIL ENGINEERING Vol.12 No.4

A water supply system is a comprehensive system including the components of water users, sources, treatment plants, andtransportation measures. The complex nature of a water supply system, however, has made hard to develop and evaluate acomprehensive and generic water supply system model. In this study, a generic water supply system model is used to evaluate watersustainability for a hypothetical system in thedecision maker to develop a model that can be understood easily by the stakeholder and non-modeler. The modular structure of thegeneric water supply system also allows for integration of a site specific model by combining modules which a modeler may wish tohave in the system. Imported and reclaimed waters to support groundwater as alternative water sources are evaluated in thehypothetical system in this study. As a result, alternative water sources demonstrate an important role to maintain water sustainabilityof the system when groundwater is the main source.

주거건물의 개별급탕방식 환탕배관 적용에 관한 실험적 연구

차민철,석호태 대한건축학회지회연합회 2007 대한건축학회지회연합회 학술발표대회논문집 Vol.2007 No.1

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 69~85% in spring and fall period and so dose up to 77~85% 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 77~86%. (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.

Study on Standardization and Construction of Inventory Database for Asset Management in Water Supply System

Myeongsik Kong,Hyundong Lee,Hongcheol Shin,Miyun Park 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.9

To standardize and construct an inventory database for a water supply system, an inheritance tree is constituted from Level 1 to 5 for specification of a classification structure for the water supply system. Level 1 is specified based on systems while Level 2 to 5 are specified to classify water supply systems by considering a structure’s role, function and type for each system. Also, the property information for asset management of each structure is systematcially investigated and written on a form to enable standardization of an inventory database. The property information is divided into asset classification information, asset location spatial information, asset specification information and asset management-related information, and the definitions, types, units and descriptions of the examined data are systematcially organized

식수문화의 변화과정

김재호(Kim Jae-Ho) 한국민속학회 2008 韓國民俗學 Vol.47 No.-

식수를 얻는 방식은 우물에서 작두샘, 그리고 상수도로 변화하였다. 이는 단순히 수리시설의 변화에 지나지 않지만, 문화변동의 관점에서 보면, 수리기술과 수리집단, 그리고 수리관념들이 상호작용하면서 빚은 수리문화체계의 변화로 해석할 수 있다. 우물에서 상수도까지의 변화과정은 무엇보다도 수리집단 즉, 인구문제와 밀접하게 연관되어 있는데, 도시화를 비롯한 집락(集落)의 거대화는 수리기술에 있어서 상수도와 같은 대규모 산업시설을 필요로 하게 되었다. 그리고 식수의 취수와 공급에 있어서 편리성과 대규모를 지향하는 산업기술에 기반을 둔 수리기술은 물 공급과 소비의 분리라는 수리조직의 변화를 초래하였으며, 물의 사회적 소비를 증대시킴과 동시에 전통적인 수리관념의 변화를 불러 일으켰다. 물의 대한 신성성은 사라지고 사회적으로 물의 상품화가 진행된 것이다. 그럼에도 불구하고 다른 한편으로는 좋은 물에 대한 갈망은 지속되어 물의 상품화가 더욱 다양화되었으며 물에 대한 사회적 관심과 가치인식은 상대적으로 높아졌다. 물을 둘러싼 기술체계와 조직체계, 그리고 이념체계가 지속적으로 상호작용하면서 수리문화를 변화시키고 있는 것이다. People obtained drinking water from fountain wells and then from syringes are now benefitting from tap water. Though that just reflects the change of water supply facilities, it can be interpreted as the change of water supply culture system which has been generated from the interaction among water supply technology, water supply community, and the concept on water supply in the perspective of culture change. The change process from fountain wells to tap water is closely connected with the water supply community, that is, the population using the water. Large-scaled resident areas constructed through urbanization required the industrialized water supply system like pipe-lined one. Technology-based water supply system which primarily aimed the improvement of convenience and the scale enlargement caused the separation between water suppliers and water consumers as well as the increase of water consuming and the change in the traditional concept on water supply. Whereas the sacred concept on water disappeared, water was commercialized. Notwithstanding, the desire to obtain quality water has been strengthened, the commercialization of water has been diversified, and the value of water as well as people's interest on water has increased. Water supply culture is in the process of change through the continuous interaction among water supply technology, water supply community, and the people's concept on water supply.

부족분 공급방식의 한강수계 저수지 시스템 용수공급능력 평가

최영제,이은경,지정원,이재응 대한토목학회 2020 대한토목학회논문집 Vol.40 No.5

Reservoir operation affects the sustainability of a water supply. However, the increase in the temporal and spatial variability of rainfall,attributed to climate change, has led to severe droughts and increased difficulty in maintaining a sustainable discharge at certain locations in a reservoir system operation. In this study, water yield was evaluated using reservoir simulation with varied water supply. Three reservoir system models were simulated for nine reservoirs in the Han River basin. The time-based reliability, volumetric reliability, and resiliency were used to evaluate the results. Each case was simulated by applying firm supply, deficit supply, and deficitsupply with historical power release of the Hwacheon Reservoir. As a result of the simulation, all indexes were increased when the deficit supply was applied. In particular, the time-based reliability increased by more than 30%, and the supply reliability increased by about 4%. The result showed that the water supply of the entire water system could be increased when all reservoirs in the water system were operated to supply water and maintain sustainable discharge at the same downstream point. The deficit supply was an efficient reservoir operation method for responding to climate change, especially increased rainfall variability. 우리나라의 용수공급은 대부분 저수지 운영에 의존하고 있어 저수지 운영은 안정적인 용수공급에 직접적인 영향을 미치게 된다. 하지만 최근 강우의 시공간적 변동성이 증가함에 따라 심도 깊은 가뭄의 발생이 잦아지고 있으며 동일 유역 내에서도 강우의 공간적 편차가 커지고 있다. 이러한 기후의 변화는 하류 지점의 안정적인 유량을 유지하기 위한 저수지 시스템의 운영에도 어려움을 증가시키고 있다. 본 연구에서는 이러한 문제를 해결하기 위한 방안으로 부족분 공급방식의 저수지 운영을 적용하여 저수지 시스템의 용수공급능력을 평가하고자 하였다. 이를 위해 한강유역에 위치한 9개 댐을 대상으로 저수지 모의운영을 실시하고, 분석결과의 평가지표로는 기간신뢰도, 양적신뢰도, 회복도 등을 활용하였다. 저수지 모의운영 모형은 일정량 공급방식 적용, 부족분 공급방식 적용, 부족분 공급 및 화천댐 실측방류량 적용 케이스 등 총 3개 케이스의 모형을 구축하였다. 그 결과 부족분 공급방식을 적용하였을 때 신뢰도와 회복도 등 모든 지표에서 저수지 시스템의 용수공급능력이 증가하는 것으로 분석되었다. 특히 기간신뢰도는 30 % 이상 증가하고 양적신뢰도는 약 4 % 증가하는 효과를 거둘 수 있는 것으로 분석되었다. 따라서 수계 내의 모든저수지가 각각 부여받은 용수공급량 충족이라는 목적과 동시에 하류 동일 지점의 안정적 유량유지를 목적으로 운영될 경우 수계전체의 용수공급능력 증대라는 효과를 얻을 수 있는 것으로 판단되었다. 또한 본 연구를 통해 부족분 공급방식의 저수지 운영이 강우의 공간적 변동성 증가와같은 기후변화에 대응 가능한 효율적인 저수지 운영방안임을 확인할 수 있었다

물수요 중심 용수공급시스템 활용을 위한 국내 농업용수 공급체계 분석

이광야,최경숙,Lee, Kwang-Ya,Choi, Kyung-Sook 경북대학교 농업과학기술연구소 2013 慶北大農學誌 Vol.31 No.2

This study analyzed agricultural water distribution systems for the utilization of water demand-oriented water supply systems. Three major TM/TC(telemeter/telecontrol) districts of agricultural water management were selected for analyzing the characteristics of the water distribution systems. In addition, the characteristics of the water supply systems for general water supply zones based on irrigation facilities were also investigated, along with the case of special water management during the drought season. As a result, high annual and monthly variations were observed for the water supply facilities, including the reservoirs and pumping stations. In particular, these variations were more obvious during the drought season, depending on the type of facility. The operations of the pumping stations and weirs were more sensitive to the stream levels than the reservoirs, and the smaller reservoirs were influenced more than the larger reservoirs. Therefore, a water-demand-oriented water supply system should consider the existing general practices of water management in the agricultural sector, and focus on achieving a laborsaving system rather than water conservation in the case of reservoirs. Equal water distribution from the start to the end point of irrigation channels could be an effective solution for managing pumping stations.