• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.40 no.5
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• pp.11-17
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• 2011

태양열을 이용한 온수급탕 및 난방시스템의 개요와 설치사례에 대하여 소개하고자 한다.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.610-611
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• 2008

국내 신재생에너지의 보급은 정부 보조금 지원을 통해 국내 지역별로 다양한 형태, 발전 용량으로 보급되고 있다. 그 중에서도 태양열 발전의 보급은 발전규모와 설비가 대형화 되고 가고 있다. 본 논문에서는 이러한 발전 시스템 지원을 위한 태양열시스템의 시간에 따른 온수급탕 특성을 분석하고자 하였다.

• 한국신재생에너지학회:학술대회논문집
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• 2005.11a
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• pp.353-362
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• 2005

태양열시스템은 하절기에 급탕과 난방 부하가 적거나, 거의 없어 시스템의 과열 문제가 야기 될 수 있다. 이를 해결하는 방안 중에 하나로 흡수식 냉방시스템을 이용하여 하절기 잉여열원을 활용하여 냉방하는 방법이 대두되고 있다. 태양열 냉방시스템은 전기에너지를 대체하는 효과 뿐 아니라 태양열 연간 이용 효율 극대화에도 크게 기여 할 수 있다. 본 고에서는 국내 기술로 최초로 개발 실용화된 중온용 단일 진공관형 태양열 집열기와 1중 효용 흡수식 냉방기를 이용하여 실증연구를 계획하였다. 태양열 냉방 실증을 위하여 단일 진공관형 태양열 집열기 집열면적 200m2, 축열조(태양열, 급탕, 냉수), 10RT급 냉방기, 냉각탑, 보조 보일러, 원격 제어 및 모니터링 등이 계획 되었다. 실증시험 중간 결과 태양열 냉방시스템은 하절기 맑은 날 하루 동안 약 5 - 6시간 안정적으로 가동 되었으며, 앞으로 온수급탕, 난방 시험을 거쳐 시스템 성능 및 경제성 평가를 통하여 유용성, 안정성 및 신뢰성이 검증 될 계획이다.

• Journal of the Korean Solar Energy Society
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• v.32 no.3
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• pp.59-67
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• 2012

In this paper, performances of solar hot water supply systems are parametrically analyzed with the variations of solar collector area, slope of collector and volume of storage. All simulations are conducted by using TRNSYS computer program. Average solar fractions, collector efficiencies and temperatures of storage are investigated monthly as well as annually. For system analysis, the maximum value of monthly average solar fractions has a limitation of 90 percent. As a result, the designed solar thermal system with $6m^2$ collector area, $50^{\circ}$ slope and $0.36m^2$ storage volume could provide almost an annual average solar fraction of 72 percent. By increasing the storage volume to $0.42m^2$, the annual solar fraction of system increases up to 73 percent.

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

• 에너지협의회보
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• s.23
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• pp.24-27
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• 1992

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.6
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• pp.556-565
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• 2004

We have experimented an actual solar water heating system acquiring real data for one year period. On the basis of the operation data, it is necessary to predict the system performance such as collector efficiency and solar fraction, and to analyze the economical efficiency for system optimal design. To estimate the performance of actual systems through simulation, valid modelling for components consisting of the system should be accompanied. The present study is focused on the modelling for load patterns and operating control conditions. We proposed two load models: concentration model which gathers real loads as a meaningful group and distribution model which disperses real loads with time. If grouping of the load distribution is suitable, the predicted values by the concentration model approaches to those by the distribution model close to actual load pattern apparently. As a result, both of them are in good agreement with those by experiment.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.2
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• pp.128-134
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• 2004

In order to verify and take measures against a variety of troubles which cannot be predicted in a well-controlled laboratory, it is necessary that solar system should be experimented in an actual situation during a long period. Through this experiment it can be also understood how the load pattern and operational conditions expected in a design process become different to those in the actual running, which can be applied to a new system design. We installed 6 kW solar hot water heating system with a shower facility and operated during 7 months. As a result, average 8.3 persons took a shower a day； solar fraction is 71％ and total collector efficiency is 40％ during the periods from March to September. We confirmed several troubles encountered in the actual situation and considered practical center-measures.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.20 no.9
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• pp.631-636
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• 2008

Solar thermal systems are recently refocused by higher oil prices, but did not completely restore the people's confidence owing to the past bad systems. Several types of solar water heating systems were analyzed in characteristics and some proper systems were proposed under Korean climates and system scale. As a small system, natural circulation system should be installed only in a southern region of Korea, with a freeze protection valve instead of heating coil for freeze protection. In most area of Korea, the forced circulation type with a heat exchange coil inside a thermal storage tank or with a spiral-jacketed storage tank, proposed and verified by the authors, has a merit of stable performance and freeze protection.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.105-110
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• 2006

Several types of solar water heating system were analyzed in characteristics and proper systems were proposed under Korean climates. In particular, the forced circulation type with a spiral-jacketed storage tank has a potential to be used widely in a small and a part of middle systems when the stratification of the storage tank can be enhanced by a precise design.