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콤팩트형 태양열/지열히트펌프 하이브리드 냉난방 및 급탕 시스템 개발 및 성능분석
백남춘,정선영,윤응상,이경호 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.5
In this study, the compact type solar thermal and ground coupled heat pump hybrid system for space heating/cooling and hot water supply has been developed. This hybrid system was installed in Zero Energy Solar House(ZeSH) in KIER for the demonstration. The thermal performance and operational characteristics of this hybrid system were analysed especially. The results are as follows. (1) This hybrid system was designed in order to address the existing disadvantages of solar thermal/ground coupled heat pump system. For this design, all parts except solar collector and ground coupled heat pump were integrated into a single product in a factory. The compact type unit includes two buffer tanks, an expansion tank, pumps, valves, a controller, etc. This system has an advantage of easy installation with simple plumbing work even in narrow space. (2) The thermal charging and discharging time of the buffer tanks and its characteristics by ground coupled heat pump, and heat pump COP according to geo-source temperature and buffer storage temperature have been studied. This system was found to meet well to the heat load without any other auxiliary heating equipment. (3) The operating hours of the ground coupled heat pump as a backup device of solar thermal can be reduced significantly by using solar heat. It was also found that the minimum heating water supply setting temperature and maximum cooling water supply setting temperature make an influence on the heat pump COP. The lower heating water and the higher cooling water temperature, the higher COP. In this respect, the hybrid system’s performance can be improved in ZeSH than conventional house.
변운섭(Woon-Seob Byun),채규호(Kyu-Ho Chae),주덕훈(Deok-Hun Ju) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
As renewable energy system, solar heating and cooling system stores heat from collector to storage tank and uses hot water stored in the tank for cooling and heating system. In winter, this system exchanges heat from the tank directly or indirectly to use as heating energy. In summer, this system supplies heat to absorption chiller to make cooling energy. It is enhanced technology to use solar heat more efficiently which used for domestic hot water service only in the past. In this paper, solar heating and cooling system applied in the governmental building will be introduced to provide reference for green building design.
장재수(Jang Jae-Su),고명진(Ko Myeong-Jin),김용식(Kim Yong-Shik) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4
This study examined the cooling performance of a solar heating and cooling system for an office building using the dynamic simulation program (TRNSYS). This solar heating and cooling system incorporates evacuated tube solar collectors of 204㎡, storage tank of 8㎥, 116.2㎾ auxiliary heater, single-effect LiBr/H2O absorption chiller of 20RT nominal cooling capacity. It was found that for the representing day showed peak cooling load the annual average collection efficiency of the collector was 32.9% and coefficient of performance of single-effect LiBr/H₂O absorption chiller was 0.68. And the results shows for the cooling season the solar fraction of the solar heating and cooling system was 32.2% and maximal and minimal solar fraction was 63.4% for May 17.9% for July respectively
시설원예 에너지자립형 계간축열기반 신재생 융복합시스템 적용성 분석
김민휘(Min-Hwi Kim),김득원(Deukwon Kim),이동원(Dong-Won Lee),허재혁(Jaehyeok Heo) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.8
This study investigated the energy performance of renewable energy convergence system based on the seasonal thermal energy storage for zero energy greenhouse. The proposed system was integrated with photovoltaic and solar thermal (PVT) system, solar thermal (ST) system, two types of seasonal thermal energy storages, and hybrid source heat pumps. The flat-plate type ST panel is integrated with tank type seasonal thermal energy storage (TTES) and the PVT is integrated on the borehole type seasonal thermal energy storage (BTES). The produced thermal energy through the ST system is mainly stored into the TTES. When the temperature of TTES is higher than the target temperature, the produced thermal energy from ST is stored into the inner BTES. The produced thermal energy through the PVT system, mainly stored into the outer BTES. The three types of heat pumps were used to assist the TTES and BTES. The one hybrid heat pump uses the air source and heat of TTES to produce the cooling and heating water for greenhouse. Another hybrid heat pump uses the air source and heat of BTES, and the other heat pump uses ground source. The energy performance of the proposed system was analyzed by TRNSYS software. The test site of greenhouse has 3,942 m² of total area and the proposed system serves cooling and heating energy. It was found that the proposed system showed 10.0 % of direct solar fraction and 41.2 % of total solar fraction.
최창용(Choi Chang-Yong),조성환(Cho Sung-Hwan),곽희열(Kwak Hee-Youl),신우철(Shin U-Cheul) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
This paper presents the simulation modeling and its results of the solar thermal driven absorption heating and cooling system for the library reading rooms of a cultural center building located in Gwangju Korea. In this study, single efficiency LiBr-H2O absorption chiller of the rated capacity 10 RT, and 0.7 COP with a evacuated tubular solar collector system is used for the solar cooling facility. A complete system composed of solar collectors, thermal storage tanks, absorption chiller, and auxiliary gas boiler is modelled, and the yearly solar energy supply rate of the system is predicted with the TRNSYS simulation results.
지역난방수 환수 승온방식의 태양열 지역냉난방 시스템 분석
백남춘(Baek, Nam-Choon),신우철(Shin, U-Cheul),이진국(Lee, Jin-Kook),윤응상(Yoon, Eung-Sang),윤석만(Yoon, Suk-Man) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
This study was carried out the design and analysis of solar thermal system with preheating of returning district heating water for the Chung-ju district heating and cooling system. Two different types of solar collectors are used for this system. TRNSYS simulation program was used for the analysis. As a results, the solar system efficiency is 35.8% for the plate type and 45.1% for the evacuated type solar collector in the case of 50?C for the returning district heating water temperature. The returning district heating water temperature is on of the very important factors that is influence on the system efficiency. So the effect of the returning district heating water temperature on the system efficiency is analyzed in this study.
원예시설 태양열 및 계간축열기반 신재생 융복합시스템 분석
김득원(Deukwon Kim),김민휘(Min-Hwi Kim),이동원(Dong-Won Lee),허재혁(Jaehyeok Heo) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
In this study, the energy performance of the seasonal thermal energy storage and solar thermal system based renewable energy convergence system was investigated. The proposed renewable energy convergence system was consisted of the solar thermal (ST) system, photovoltaic and solar thermal (PVT) system, tank type seasonal thermal energy storage (TTES), borehole type seasonal thermal energy storage (BTES), and hybrid heat pump systems. The flat-plate type ST panel is integrated with TTES and the PVT is integrated on the BTES. The hybrid heat pump uses either air-source or water-source. The water-sources are the heat of TTES, BTES, or geothermal to produce the heating water for greenhouse. The energy performance of the proposed system was analyzed by TRNSYS software. The test site of greenhouse has 3,942 ㎡ of total area and the proposed system serves cooling and heating energy. It was found that the proposed system showed 10.0 % of direct solar fraction and 41.2 % of total solar fraction.
The Study on the Energy self-sufficiency and Economic Analysis of KIER Zero Energy Solar House
정선영(Jeong, Seonyeong),백남춘(Baek, Namchoon),유창균(Yoo, Changkyoon),윤응상(Yoon, Eungsang),윤종호(Yoon, Jongho) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
In this study, the energy and economic analysis of KIER Zero Energy Solar House (KIER ZeSH) was carried out. KIER ZeSH was designed and constructed in the end of 2009 for the purpose of more than 70% energy self-sufficiency in total load as well as less than 20% of additional construction cost. The several building energy conservation technologies like as super insulation, high performance window, wast heat recovery system, etc and renewable energy system. The renewable heating and cooling system is a kind of solar thermal system combined with geo-source heat pump as a back-up device. The capacity of 3.15kW solar BIPV system was also installed on the roof. The measurement by monitering system of ZeSH was conducted for one year from November 2009 to October 2010. The energy self-sufficiency and economic analysis were conducted based on the this monitering result. As a result, the energy self sufficiency is about 83% which is higher than that of the target and the payback period is 11 years.
창호 에너지소비효율등급제에 따른 공동주택의 열성능 평가
임희원,김동윤,이수만,안정혁,윤종호,신우철 대한설비공학회 2018 설비공학 논문집 Vol.30 No.4
The Korean fenestration energy consumption efficiency rating system only considers thermal performance of the heat transfer coefficient (U-value) and airtightness excluding optical characteristics of the solar heat gain coefficient (SHGC). This study analyzed annual heating and cooling energy requirements on the middle floor of apartment by optical and thermal performance of windows to evaluate the suitability of the rating system. One hundred and twenty-eight windows were analyzed using THERM and WINDOW 7.4, and energy simulation for a reference model of an apartment house facing south was performed using TRNSYS 17. The results showed that window performance was the main factor in the heating and cooling load. The heating load of the reference model was 539 kWh to 2,022 kW, and the cooling load was 376 kWh to 1,443 kWh. The coefficient of determination (R2) of the heating and cooling loads driven from the SHGC were 0.7437 and 0.9869, which are more compatible than those from the U-value, 0.0558 and 0.4781. Therefore, it is not reasonable to evaluate the energy performance of windows using only the U-value, and the Korean fenestration energy consumption efficiency rating system requires a new evaluation standard, including SHGC.
제로에너지 솔라하우스(KIER ZeSH-Ⅱ)의 에너지성능 측정 및 에너지자립도 분석
정선영(Jeong, Seon-Yeong),백남춘(Baek, Nam-Choon),윤종호(Yoon, Jong-Ho),신우철(Shin, U-Cheul),김용경(Kim, Yong-Kyoung),강승훈(Kang, Seung-Hoon) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.12
In this study, the performance measurement and energy analysis of KIER Zero Energy Solar House (KIER ZeSH-Ⅱ) was carried out. KIER ZeSH-Ⅱ was designed and constructed in the end of 2009 for the purpose of more than 70% energy self-sufficiency in total load as well as less than 20% of additional construction cost. The several building energy conservation technologies like as super insulation, high performance window, waste heat recovery system, etc and renewable energy system. The renewable heating and cooling system is a kind of solar thermal system combined with geo-source heat pump as a back-up device. The capacity of 3.15㎾p solar BIPV system was also installed on the roof. The measurement by monitoring system of ZeSH-Ⅱ was conducted for one year from January 2010 to December 2010. The energy self-sufficiency and economic analysis were conducted based on the this monitoring result. As a result, the energy self sufficiency is about 94% which is higher than that of the target. The results proved that commercial possibility of next generation Zero Energy Solar House.