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Demonstration study of desalination system with renewable energy
주홍진(Joo, Hong-Jin),황인선(Hwang, In-Seon),주문창(Joo, Moon-Chang),곽희열(Kwak, Hee-Youl) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
This study was carried out to evaluate the operating performances of the evaporation desalination system with solar energy. This system was designed to use evacuated solar collector as the heat source, supplying the required heat energy and photovoltaic power as the electric source, supplying required power to pumps in the desalination system. The 5kW photovoltaic power generation system to make the electricity, the single-stage fresh water generator with plate heat exchanger, and remote control and monitoring system. Solar desalination system was designed and installed in Jeju-island, Korea in 2006, after about 4 years of operation, usability and stability of solar desalination system was guaranteed. The system comprises of the desalination unit which was designed to have daily fresh water capacity of 2m³, a 120m² evacuated tubular solar collector to supply the heat, a 6m³ heat storage tank, and a 5.2kW photovoltaic power generation to supply the electricity to hydraulic pumps for the heat medium fluids. On a clear day, average daily solar irradiance in Jeju-island was measured to be 500W/m² and the daily fresh water yield showed to be more than 500 liters under this condition. After around three years of a long term operation of the system from January 2007 to August 2009, average daily freshwater yield was analyzed to be around 330{ell}. The relationship equation between solar irradiance and freshwater yield was found to be y=1.1806x - 107.89.
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.
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 이용 증발식 1단 SAT 해수담수화 시스템의 성능평가
황인선(Hwang In-Seon),주홍진(Joo Hong-Jin),윤상국(Yun Sang-kook),주문창(Joo Moon-Chang),곽희열(Kwak Hee-youl) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
This study was described the development of fresh water generator, that was one of the core technology for the evaporating desalination system with solar energy. Especially, the final goal of this project is the evaporating multiple effect desalination, this study was manufactured heat exchangers with bare tubes and spiral tubes in order to improve the performance of evaporation and condensation for single effect shell and tubes(SAT) fresh water generator. The experimental apparatus consists mainly of ejector pump, Hot water pump, flow meter, demister, cooler, evaporator and condenser. The experimental variables were chosen 70℃ for hot water inlet temperature, 60, 80, 100 and 120 ℓ/min hot water flow rate, 3.0, 4.0 and 5.0 ℓ/min for evaporator feed seawater flow rate, 0 and 90㎜ for demister thickness and spiral tube condenser, bare tube condenser. Experiment Sea water inlet temperature was selected 22℃ to cover the average sea water temperature and the salinity of sea water is measured about 33,000 PPM(parts per million). for a year in Korea. This study was analyzed the results of thermal performance of single effect shell and tubes(SAT) fresh water generator.
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),주홍진(Joo Hong-Jin),주문창(Joo Moon-Chang),김정배(Kim Jung Bae) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study was carry out evaluation of seasonal performance for the decentralized desalination system with the solar thermal system and tile photo voltaic power system. First operating demonstration system was set up in Cheju in 2006. These system comprises the desalination unit with designed daily fresh water capacity of 2 ㎡ and is supplied by a 120 ㎡ evacuated tubular solar collector, a 6㎡ heat storage tank, and a 5㎾ photovoltaic power generation supply the electricity for hydraulic pumps to move the working fluids. In a spring season day average 392W/ ㎡ the daily fresh water showed to produce about 340liter. In a summer season day average 296W /㎡, the daily fresh water showed to produce about 328liter. In a autumn season day average 349W/㎡, the daily fresh water showed to produce about 277liter. In a winter season day average 342W/㎡, the daily fresh water showed to produce about 271liter.