• Transactions of the Korean Society of Mechanical Engineers B
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• v.36 no.8
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• pp.803-809
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• 2012

It is necessary to predict the heating load in order to determine the optimal scheduling control of district heating systems. Heating loads are affected by many complex parameters, and therefore, it is necessary to develop an efficient, flexible, and easy to use prediction method for the heating load. In this study, simple specifications included in a building design document and the estimated temperature and humidity are used to predict the heating load on the next day. To validate the performance of the proposed method, heating load data measured from a benchmark district heating system are compared with the predicted results. The predicted outdoor temperature and humidity show a variation trend that agrees with the measured data. The predicted heating loads show good agreement with the measured hourly, daily, and monthly loads. During the heating period, the monthly load error was estimated to be 4.68%.

• Korean Chemical Engineering Research
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• v.47 no.1
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• pp.119-126
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• 2009

A district energy system plays very important role to fulfill energy demand in regional areas. This paper diagnoses the necessity of the development of an economical operation system for the efficient operation of district energy plants located in Seoul. The effect anticipated from the use of the optimal operation system is also analyzed. Production and consumption of energy are estimated for the district energy plants at Suseo, Bundang, Ilwon and Jungang located near in Seoul, Korea. The problem is formulated as a mixed integer linear programming(MILP) problem where the objective is to minimize the overall cost of the district energy system. From the results of numerical simulations we can see that the energy efficiency is improved due to the application of the optimal operation conditions provided by the proposed model.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.33 no.3
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• pp.11-18
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• 2004

흡수식 사이클을 이용한 에너지의 장거리수송 기술을 소개하고 경제성평가 결과를 제시한다. 현재 에너지수요 측면에서 가장 높은 증가율을 보이고 있는 것이 바로 대도시 및 산업단지의 냉$.$난방 및 급탕용 에너지이다. 냉$.$난방에 사용되는 에너지는 10$0^{\circ}C$미만의 저온으로서 고열원 에너지인 화석연료의 사용은 에너지사용 면에서 비효율적이다. 따라서 산업지 역에서 버려지는 폐열원등의 각종 미활용에너지를 이용하여 냉$.$난방부하를 충족시킬 수 있는 에너지 절약형 시스템의 개발이 매우 중요한 과제로 대두되고 있다. 일반적으로 미활용에너지 및 폐열에너지 공급지역은 소비지역으로부터 멀리 떨어져 있다. 지금까지 흡수식시스템은 냉동 및 냉방의 개념에서 기술개발 및 실용적운전이 이루어져 왔으나, 본 논문에서는 흡수식시스템을 이용한 에너지의 장거리수송 및 변환 기술을 소개하고자 한다.

• KIISE Transactions on Computing Practices
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• v.24 no.1
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• pp.24-32
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• 2018

This paper proposes a Big Data system for energy Big Data which is aggregated in real-time from industrial and public sources. The constructed Big Data system is based on Hadoop and the Spark framework is simultaneously applied on Big Data processing, which supports in-memory distributed computing. In the paper, we focus on Big Data, in the form of heat energy for district heating, and deal with methodologies for storing, managing, processing and analyzing aggregated Big Data in real-time while considering properties of energy input and output. At present, the Big Data influx is stored and managed in accordance with the designed relational database schema inside the system and the stored Big Data is processed and analyzed as to set objectives. The paper exemplifies a number of heat demand plants, concerned with district heating, as industrial sources of heat energy Big Data gathered in real-time as well as the proposed system.

• The Magazine of Kiice
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• v.16 no.2
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• pp.36-42
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• 2015

• 월간 기계설비
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• no.11 s.208
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• pp.74-77
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• 2007

• 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.421-437
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• 1994

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.24 no.6
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• pp.684-693
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• 1995

• Intergrated Energy Industry
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• s.5
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• pp.39-41
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• 2007

• Nuclear industry
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• no.9_10 s.9
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• pp.38-40
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• 1982

스웨덴의 원자로 marker Asea-Atom사는 지역난방(DH)용 원자로로 SECURE를 개발했다. 이 원자로는 (1) 저온도, 저압력, (2) 본질적인 안전성(기술적 안전시스템에 의하지 않은)에 의해 로의 정지${\cdot}$냉각이 어떠한 상황아래에서도 보증된다, (3) 사고시에 운전원에 의한 조작을 필요로 하지 않는다, (4) 출력밀도가 낮기 때문에 핵분열생성물질의 방출 우려가 적다는 등의 특징을 가지며 그 안전성으로 인해 도시부근에 위치할 수 있으며 또한 경제적으로도 석유나 석탄을 연소시키는 boiler보다 훨씬 유리하다.