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김정배(Kim Jeongbae),윤응상(Yoon Eung-Sang),주문창(Joo Moon-Chang),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2007 한국태양에너지학회 학술대회논문집 Vol.- No.-
In this research, to develop the application system for practical use of fresh water generation system with low pressure evaporation method is the main object using the evacuated solar collector with operating range of about 50-85℃ as thermal system and solar photovoltaic system as electric supply system. To achieve that object, this study will set up the demo-plant, then estimate and analyze the usefulness, the safety, the reliability and the economical effectiveness. The fresh water generation rate would be about 2 Ton per day. And the estimated solar collector area for heating medium was about 120 square meters and PV system was estimated 5kW as the total electric requirement.
곽희열(Kwak Hee-Youl),윤응상(Yoon Eung-Sang),주문창(Joo Moon-Chan),주홍진(Joo Hong-Jin) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study was analyzed the long term performance of the demonstration system for solar energy desalination in Jeju. we used a solar thermal system as heat source of the single-stage fresh water generator with plate-type heat exchangers and a photovoltaic power system as electric source for hydraulic pumps. The demonstration system was designed and installed at Jeju-island in 2006. The system was comprised of the desalination unit with daily fresh water capacity designed as 2㎥, a 120㎡ evacuated tubular solar collector to supply the heat, a 6㎥ heat storage tank, and a 5kW photovoltaic power generation to supply the electricity of hydraulic pumps for the heat medium fluids. Through the operation during about 3 years, In a clear day more than 400W/㎡, the daily fresh water showed to produce more than about 500liter, and from January, 2007 to March, 2009 for 3 years, solar irradiance daily averaged was measured 370W/㎡, the daily fresh water yield showed that can be produced about 330liter.
김정배(Jeongbae Kim),주문창(Moon Chang Joo),윤응상(Eung Sang Yoon),곽희열(Hee Youl Kwak) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Parametric experiments for evaluating the performance of fresh water generator applied plate type heat exchanger were performed in this study. The test facility for the performance test were designed and manufactured. The maximum fresh water yield of the fresh water generator applied in this study was designed as 1.5 Ton/day. The parameters relating with the performance of fresh water generator are known as sea water inlet temperature, hot water inlet temperature, and hot water flow rate. The test ranges for each parameters were 10, 20, and 30℃ for sea water inlet temperature, 65, 75, and 85℃ for hot water inlet temperature, 2.0, 2.5, and 3.0㎥/hr for hot water inlet volume flow rate, respectively. And the experiments to reveal the accuracy of experimental apparatus and to show the repeatability and reproducibility were also performed. The quantitative analysis for the heat transfer mechanism and mass balance under physically possible assumptions is also conducted with simple thermodynamic equations. The experimental and estimated quantities were compared. Through the experiments and simple analysis, this study showed detail operation characteristics of fresh water generator with plate type heat exchanger.
태양열 실증시스템의 진공관형 태양열 집열기 장기 열성능
이호(Lee Ho),주홍진(Joo Hong-Jin),윤응상(Yoon Eung-Sang),김상진(Kim Sang-Jin),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
This paper presents demonstration study results derived through field testing of a part load solar energized cooling system for the library of a cultural center building located in Gwangju, Korea. First operating demonstration system was set up in Gwangju in 2005. These system comprises the 200㎡ evacuated tubular solar collector, a 6㎡ heat storage tank. In a 2003, daily average of insolation showed about 506\/㎡ the solar collector efficiency was 44%. In a 2007, daily average of insolation showed about 507W/㎡ the solar collector efficiency was 42%. As a result, evacuated tubular solar collector kept the high efficiency for two years.
김정배(Kim Jeongbae),이순명(Rhie Soon-Myeong),윤응상(Yoon Eung-Sang),이진국(Lee Jin-Kook),주문창(Joo Moon-Chang),백남춘(Baek Nam-Choon) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study shows the results on thermal performance test with domestic solar collector for low-temperature applications using KS, then reveals the efficiency difference between KS and EN standard. Using the test results, this study presents the status of thermal performance with domestic solar collector including flat-plate, single evacuated, and double evacuated (with mirror or Ur-tube) solar collector.
김정배(Kim Jeongbae),주홍진(Joo Hong-Jin),윤응상(Yoon Eung-Sang),주문창(Joo Moon-Chang),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.4
In this research, to develop the practical application system of fresh water generation system with plate-type fresh water generator using low pressure evaporation method is the main object, and to do that, this study used the evacuated solar collector with operating range of about 50-85℃ as thermal energy source and solar photovoltaic as electric energy source. To achieve that object, this study set up the demo-plant, then estimated and analyzed the usefulness, the safety, and the reliability through pre-tests during short time ahead of the long-time operation. This study showed that the pumps, which are including sea water supply, ejector, hot water supply, and fresh water pumps, were operated one after another. And, the fresh water yield was closely related with the solar irradiance and lower supply temperature of hot water was revealed more reasonable for the solar energy desalination system. That is due to the insufficient area than the solar collector area being required that was estimated through the performance tests of the fresh water generator.
정모(Chung, Mo),이동원(Lee, Dong-Won),김정배(Kim, Jeong-Bae),윤응상(Yoon, Eung-Sang),변무룡(Byun, Moo-Ryong),변무원(Byun, Moon-Won) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
A low-temperature solar thermal system assisting a biological nitrogen treatment reservoir was designed and field-tested. A large tank whose temperature was maintained at about 25{sim}30?C to enhance the performance of a biological nitrogen treatment process was heated by an array of flat plate solar collectors. Test results revealed that the overall collector efficiency was above 50% for the most cases tested. This high efficiency was possible owing to the relatively low collector temperature that can be traced back to the reservoir temperature. A substantial enhancement in nitrogen treatment was observed as a result of maintaining the reservoir temperature higher.