• 제목/요약/키워드: District heating

검색결과 437건 처리시간 0.026초

지역난방용 태양열시스템 (Solar District Heating System)

  • 백남춘;이진국;윤응상;윤석만;신우철
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 하계학술발표대회 논문집
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    • pp.663-668
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    • 2008
  • This study was carried out solar heating system design for district heating and it's the performance analysis by experiment. This experimental system was installed in Bundang district heating area in the end of 2006. The flat plate and vacuum tube solar collector are combined in one system. So district heating water is heated first by flat plate solar collector and than by vacuum tube solar collector. This solar heating system has not a solar buffer tank and is operating with variable flow rate to obtain a setting temperature of $90{\sim}95^{\circ}C$. As a result, the daily solar thermal collection efficiency is about 30 to 40% for the plate type and 50 to 55% for the vacuum tube solar collector. It varied especially depend on the weather condition like as solar radiation and ambient temperature. This variable flow rate system can be also reduced much pumping power more than 50%.

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실데이터 분석을 통한 지역난방 열배관의 피로안전성 평가 (Fatigue Evaluation of District Heat Pipes based on the Measured Data)

  • 박진은;경갑수;안용모;권순철
    • 한국강구조학회 논문집
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    • 제23권5호
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    • pp.569-579
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    • 2011
  • 지역난방 시스템의 주요 구성요소의 하나인 열배관은 크게 공급관과 회수관으로 구분되며, 지역난방에서의 열수송 배관은 난방수의 온도변화에 따른 열응력을 받게 되므로 공용년수 증가에 따라 열응력에 의한 피로현상이 발생하게 된다. 한편 지역난방 열배관은 사용자배관의 공용조건에 따라 다양한 특성을 나타내며 이러한 불규칙한 온도변화는 열배관의 피로에 악영향을 미치게 된다. 따라서 본 연구에서는 기 매설된 공용중인 지역별 열배관에 대해 현장계측을 실시하고 각 지역의 데이터를 분석하였다. 또한 사이클기반 피로평가법 및 응력기반 피로평가법을 통하여 지역난방 열배관의 피로안전성을 평가하였다.

지역난방 동절기 공동주택 온수급탕부하의 LS-SVM 기반 모델링 (LS-SVM Based Modeling of Winter Time Apartment Hot Water Supply Load in District Heating System)

  • 박영칠
    • 설비공학논문집
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    • 제28권9호
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    • pp.355-360
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    • 2016
  • Continuing to the modeling of heating load, this paper, as the second part of consecutive works, presents LS-SVM (least square support vector machine) based model of winter time apartment hot water supply load in a district heating system, so as to be used in prediction of heating energy usage. Similar, but more severely, to heating load, hot water supply load varies in highly nonlinear manner. Such nonlinearity makes analytical model of it hardly exist in the literatures. LS-SVM is known as a good modeling tool for the system, especially for the nonlinear system depended by many independent factors. We collect 26,208 data of hot water supply load over a 13-week period in winter time, from 12 heat exchangers in seven different apartments. Then part of the collected data were used to construct LS-SVM based model and the rest of those were used to test the formed model accuracy. In modeling, we first constructed the model of district heating system's hot water supply load, using the unit heating area's hot water supply load of seven apartments. Such model will be used to estimate the total hot water supply load of which the district heating system needs to provide. Then the individual apartment hot water supply load model is also formed, which can be used to predict and to control the energy consumption of the individual apartment. The results obtained show that the total hot water supply load, which will be provided by the district heating system in winter time, can be predicted within 10% in MAPE (mean absolute percentage error). Also the individual apartment models can predict the individual apartment energy consumption for hot water supply load within 10% ~ 20% in MAPE.

집단에너지 열연계운전 분석을 위한 시뮬레이터 개발 (Development of a simulation program for the analysis of a thermal networking operation in District Heating)

  • 임용훈;박화춘;정모
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 하계학술발표대회 논문집
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    • pp.825-832
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    • 2008
  • A simulation program is developed for analysing thermal networking process between the District heating and the CES(Community Energy Supply) systems. The effects of thermal networking on the District heating facilities previously being operated are implemented using mathematical correlations in terms of the fuel consumption and energy load such as heating and electricity. The operational characteristics according to the prime movers is modeled based on the materials of efficiency as a function of operational load. The unit energy load model is also developed extensively for several building types such as apartment complex, hotel, hospital, buildings for business and commercial use respectively. The specific features of the newly developed program in simulation of thermal networking process in district heating is described in terms of the reliability and the easiness for operating it etc.

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지역난방 아파트의 난방 관리 실태에 관한 연구 (A Study on the Residential Energy Management of Apartment in the District Heating Area)

  • 최남숙
    • 가정과삶의질연구
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    • 제7권1호
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    • pp.79-95
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    • 1989
  • Household energy consumption had influenced on the ecological system's environment. Household's exceeding energy consumption requires the development of resources and the risk. Thus this study attempted to find the household heating management, The purpose of this study was to investigate the household's heating management in the area of district heating. The major finding were; 1) The district heating was accepted positively and the benefit of this system was utilized very well in the household. 2) Variances in heating energy consumption was explained by the family size at October, residential period at October and November and the temperature of living room at October, November and December. 3) Compaired to central heating apartment, the low heating expenditure was characterize in the household of 4-5 persons, nuclear family at October, moderated heating control, using extra heating facilities at November. An in the December, that household was that husband has graduated college, temperature of the living room was some cold, and house wives was the full-time homemaker.

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수도권 지역난방연계 열병합발전소의 기반기금 지원과 개선방안 (A Study on the Improvement of Subsidy Program for CHP Plant Connected with Capital Region District Heating System)

  • 김창수;이창호
    • 대한전기학회논문지:전력기술부문A
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    • 제53권2호
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    • pp.97-103
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    • 2004
  • CHP system supplies electricity and heating together with high efficiency. Current utility's CHP system uses electric power by itself and sells thermal energy to KDHC(Korea District Heating Corporation). CHP's operation cost except sales revenue of heating was covered by the sale revenue of electricity. Thus Electric generation cost in district Heating CHP system has close relationship with the level of heating price. However, after the restructuring of electricity industry, the operation cost could not be covered by sales revenue of heating and electricity. This loss was compensated by energy subsidy program in the electric power industry infrastructure fund. This paper suggests reasonable evaluation and improvement methods of the loss calculation of CHP system utilizing the infrastructure fund efficiency In terms of the direction of support by the fund, it provides the methods to prevent inefficient operation through setting up the upper limit of subsidy and to improve the loss calculation. Moreover, it suggest fixed rate support by heating supply level and reducing subsidy gradually for an efficient operation of CHP system.

지역난방 수용가측 효율관리를 위한 IoT 기반 시스템 구축에 관한 연구 (A Study on the Construction of IoT based System for District Heating Customer-side Energy Efficiency Management)

  • 윤정미;이상학;안창구;엄재식
    • 에너지공학
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    • 제26권3호
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    • pp.113-122
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    • 2017
  • 우리나라 집단에너지 사업의 주요축인 지역난방 시스템은 경제성 있는 열에너지 공급시스템으로 국민편익과 안전에 많은 기여를 해 왔다. 하지만 관리주체의 불명확함, 전문기술인력 부족 등으로 인해 공동주택 수용가측의 열효율저하, 요금 불공정등의 문제가 발생하고 있다. 본 논문에서는 관리사각지대인 지역난방 수용가측 설비의 효율 및 고장관리를 위해 필요한 모니터링 포인트를 제안하고, 이를 표준화 하기 위한 표준참조모델을 제안한다. 또한 IoT 센서 기술을 적용하여 실시간 모니터링 및 통합관리 시스템을 구축함으로써, 지역난방 수용가시설에 대한 서비스 질 개선과 에너지 효율향상을 위한 기술적 방법론을 제안한다.

지역난방 시스템의 순환수에 따른 보일러 튜브의 부식 특성 (Corrosion Behavior of Boiler Tube under Circulation Water Conditions in District Heating System)

  • 홍민기;조정민;송민지;김우철;하태백;이수열
    • Corrosion Science and Technology
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    • 제17권6호
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    • pp.287-291
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    • 2018
  • In this study, corrosion behavior of a SA178-A alloy used in the boiler tube of a district heating system was investigated in different environments where it was exposed to pure water, district heating (DH) water, and filtered district heating (FDH) water. After the corrosion test, the surface morphology was examined for observation of the number of pitting sites and pitting area fraction, using a scanning electron microscope. The DH water and FDH water conditions resulted in a lower corrosion potential and pitting potential, and revealed a significantly higher corrosion rate than the pure water condition. The pitting sites in the DH water (pH 9.6) were approximately eighteen times larger than those in the pure water (pH 9.6). Compared to the DH water, the corrosion potential became more noble in the FDH water condition, where iron ions were reduced through filtration. However, the corrosion rate increased in the FDH water due to an increased concentration of chloride ions, which deteriorated the stability of passive film.

수소도시 내 마이크로 히트그리드 구성 방안 및 최적 규모 산정 연구 (A Study for Analysis of Micro Heat Grid Configuration and Deduction of Optimal Size in Hydrogen Cities)

  • 이종준;임슬예;신경아;김남웅;김도형;박철규
    • 한국수소및신에너지학회논문집
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    • 제33권6호
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    • pp.845-855
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    • 2022
  • In response to climate change, the world is continuing efforts to reduce fossil fuels, expand renewable energy, and improve energy efficiency with the goal of achieving carbon neutrality. In particular, R&D is being made on the value chain covering the entire cycle of hydrogen production, storage, transportation, and utilization in order to shift the energy supply system to focus on hydrogen energy. Hydrogen-based energy sources can produce heat and electricity at the same time, so it is possible to utilize heat energy, which can increase overall efficiency. In this study, calculation of the optimal scale for hydrogen-based cogeneration and the composition of heat sources were reviewed. It refers to a method of the optimal heat source size according to the external heat supply and heat storage to be considered. The results of this study can be used as basic data for establishing a hydrogen-based energy supply model in the future.