• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.11-11
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• 2006

• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.10-10
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• 2006

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.199-199
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• 2007

• Proceedings of the SAREK Conference
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• 2003.07a
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• pp.189-189
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• 2003

• Proceedings of the SAREK Conference
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• 2004.06a
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• pp.243-243
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• 2004

• Journal of the Korean Solar Energy Society
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• v.32 no.5
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• pp.11-17
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• 2012

In this study, a simulation program was developed with heat transfer model in the thermal storage tank for a solar collector and burner combined heating and hot water supply system. Analysis was conducted with variation of operating condition and schedule to analyze performance of a hot water supply and panel heating system with a solar collector and burner combined thermal storage tank. The simulation program is divided two sections. One part is calculation of temperature variation of water which flows through the panel in the floor for heating of the residential house during 24 hours, and the other part is heat transfer calculation for the reaction time to get desired water temperature in the thermal storage tank. As results, light oil consumption and system performance during operation period were analyzed with variation of climate condition and with or without solar collector. Most of the case, oil could be saved about from 24 to 41% with installing the solar collector. The performance of the system is more dependent on radiation time of the solar collector rather than the intensity of the solar radiation which was adopted for the climate analysis.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.17 no.3
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• pp.232-242
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• 2005

It has been recognized that solar water heating systems are economically inferior to conventional gas water-heaters and boilers using light oil as fuel in spite of having practical possibilities among other alternative energy facilities in Korea. The solar system, however, should be revaluated due to the sharp rise of oil prices recently. We have calculated the energy amount and cost through a series of research projects for the system by experiment and simulation, which lead to analyzing reliable life cycle costs. For the economic analysis, the gas water-heater and light oil boiler were taken as base cases while the solar systems implemented with these facilities were compared as alternatives. As a result, the solar system using the light oil as an auxiliary fuel surpassed the light oil boiler in economics. And a $50\%$ government subsidy for the initial cost is needed to maintain competitiveness with the gas hot-water heater. With this support, the simple payback period of the system can approach 12.8 years under $20\%$ additional curtailment of expenditure.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2135-2137
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• 2001

지구에 공급되는 태양열은 지구상의 모든 인간이 필요로 하는 총 에너지량의 10,000배 이상으로 매우 풍부할 뿐만 아니라 무공해 에너지원으로 매우 좋은 조건을 갖추고 있는데 비해 실제 이용은 태양광 발전장치와 온수 난방에 한정되어 있다. 특히 우리나라는 일사량이 풍부하고 인구밀집 거주지역이 많아 태양에너지 이용이 적절한 것으로 분석된 바 있으며, 환경오염문제가 심각하게 대두되고 있는 상황에서 에너지와 환경문제를 동시에 해결할 수 있는 태양 에너지에 대한 기술개발 및 보급이 반드시 필요하다고 판단된다. 본 연구는 태양광을 집광하여 건물 내에 분배하는 장치를 개발하여 건물 전체 전기에너지 소비량의 약1/3을 차지하고 있는 조명용 전기에너지를 절약함으로써 에너지 절약은 물론 환경오염을 줄이는데 그 목적을 두고 있다.

• Solar Energy
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• v.9 no.2
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• pp.3-13
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• 1989

This study has been conducted to measure the performance of 5 thermosyphon solar water heaters suitable for Korean climate and to develop the most optimum system. Each system consists of two flat plate collectors of $4'{\times}8'$ (or three flat plate collectors of $3'{\times}6'$) connected in parallel and a storage tank of $300{\ell}$ capacity. Among the tested systems, the configuration that has two flat plate collectors of $4'{\times}8'$ and a horizontal tank-in-tank type storage unit with internal fins (C system) showed the highest performance.

• Solar Energy
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• v.7 no.1
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• pp.3-13
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• 1987

A batch type passive solar water systems, which perform the dual function of absorbing the solar energy and storing the heated water, have been designed and fabricated for the purpose of side-by-side testing at KIER. The test models included an A, B and C type batch systems which were classified according to the design of box and arrangement of tanks. The year-round performance tests show that B type batch system taken the step-wise tank arrangement indicates 55.7% yearly-average collection efficiency factor and 61% yearly-average maximum collection efficiency factor. Computer-aided-experimental results show that the sufficient hot water can be obtained in the early morning if the glazing is supplemented by a reflector/insulation cover. The thermal performance equation has been developed for the prediction of hourly variation of the water temperature in tank.