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태양열 해수담수화를 위한 증발식 MEMS(Multi-Effect-Multi-Stage)담수기 성능 실험 연구
주홍진(Joo Hong-Jin),전용한(Jeon Yong-Han),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.3
In this study, we have carried out development and performance evaluation of optimized MEMS(Multi-Effect-Multi-Stage)fresh water generator with 7㎥/day for solar thermal desalination system. The developed MEMS was composed of high temperature part and low temperature part. This arrangement has the advantage of increasing the availability of solar thermal energy. The MEMS consists of 2 steam generators, 5 evaporators, and 1 condenser. Tubes of heat exchanger used for steam generators, evaporators and condenser were manufactured by corrugated tubes. The performance of the MEMS was tested through in-door experiments, using an electric heater as heat source. The experimental conditions for each parameters were 20℃ for sea water inlet temperature to condenser, 8.16㎥ /hour sea water inlet volume flow rate, 70℃ for hot water inlet temperature to generator of high temperature part, 3.6 4.8, 6.0㎥/hour for hot water inlet volume flow rate. As a result, The developed MEMS was required about 85kW heating source to produce 7㎥/day of fresh water. It was analyzed that the performance ratio of MEMS was about 2.6.
공동주택의 제로카본 그린홈을 위한 신재생에너지 하이브리드 열공급 시스템의 열성능 분석
주홍진(Joo Hong-Jin),이경호(Lee Kyoung-Ho),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.3
This study was carried out to evaluate thermal performance of the renewable hybrid heat supply system with solar thermal system and wood pellet boiler for Zero Carbon Green home of apartment houses. The hybrid heat supply system was set up at Korea Institute Energy Research in 2011. The system was comprised of the wood pellet boiler unit with heat capacity designed as 20,000 kacal/hr, a evacuated tubular solar collector 3.74 m2 of aperture area at the 20º install angle, a 0.3 m2 hot water storage tank, a 0.15 m2 hot water storage tank for space heating. Thermal performance tests for one-house of apartment house were carried out by hot water load and heating load in winter season through the hybrid heat supply system. As a result, hot water energy supplied by the hybrid heat supply system was 11kWh in a day. Solar thermal energy portion was 2.99kWh which is 27% of the total hot water energy supply, wood pellet boiler supply portion was 8.017kWh which is 73% of the total hot water energy supply.
주홍진 ( Hong Jin Joo ),김미리 ( Mi Ri Kim ),조백기 ( Baik Kee Cho ),박현정 ( Hyun Jeong Park ),이인용 ( In Yong Lee ),김태흥 ( Tae Heung Kim ) 대한피부과학회 2016 대한피부과학회지 Vol.54 No.2
A 53-year-old woman presented with asymptomatic pedunculated mass on her buttock. She was attacked by the tick while climbing the Jungbyung mountain located in Changwon City, the southern coastal area of the Korean Peninsula. It was identified as male Amblyomma testudinarium according to its morphological characteristics. Histological examination showed dense inflammatory infiltration of neutrophils and eosinophils, and dilated vessels on the dermis beneath the biting site of the tick. There have been only few reports of the tick bite by A. testudinarium in the Korean literature. To the best of our knowledge, our patient is the second case of tick bite from this species and the first tick bite from the male tick recorded in Korea. Here, we report a case of tick bite by male A. testudinarium in a woman, including a review of relevant literature. (Korean J Dermatol 2016;54(2):125∼128)
주홍진(Joo Hong-Jin),곽희열(Kwak Hee-Youl),김종보(Kim Jong-Bo) 한국태양에너지학회 2007 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study has been carried out find the thermal performance and operating characteristics comparison of singular evacuated tubular solar collector(ETSC) using different working fluid. Three sets having different evacuated tubular solar collector with heat pipe working fluids Water, Ethanol, MA were investigated in the same operating condition for a indoor experiment equipment. First the result of working fluid using water showed that F R(τα) was 0.6636 and F RU L was -1.8457. second working fluid using ethanol showed that F R(τα) was 0.6147 and F RU L was -0.6365. Finally when working fluid using MA's occasion that non-condensable gas does not happen F R(τα) was 0.6572 and F RU L was -2.0086.
주홍진(Hong-Jin Joo),양용우(Yong-Woo Yang),곽희열(Hee-Youl Kwak) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.5
This study was accomplished to get the foundation design data of VMD(Vacuum Membrane Distillation) system for Solar Thermal VMD plant. VMD experiment was designed to evaluate thermal performance of VMD using PVDF(polyvinylidene fluoride) hollow fiber hydrophobic membranes. The total membrane surface area in a VMD module is 5.3㎡. Experimental equipments to evaluate VMD system consists of various parts such as VMD module, heat exchanger, heater, storage tank, pump, flow meter, microfilter. The experimental conditions to evaluate VMD module were salt concentration, temperature, flow rate of feed sea water. Salt concentration of feed water were used by aqueous NaCl solutions of 25g/l, 35g/l and 45g/l concentration. As a result, increase in permeate flux of VMD module is due to the increasing feed water temperature and feed water flow rate. Also, decrease in permeate flux of VMD module is due to increasing salinity of feed water.VMD module required about 590 kWh/day of heating energy to produce 1㎥/day of fresh water.
수직 벽면형 태양열 온수급탕 시스템의 학교건물 적용을 위한 드레인백 시스템의 과열 및 동파방지 유용성 평가
주홍진(Joo, Hong-Jin),이경호(Lee, Kyoung-Ho),안영섭(An, Young-Sub),이왕제(Lee, Wang-Je) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.3
In this study, a drain back system to prevent summer season overheating and winter season freezing of facade installed solar hot water system for school building was suggested and evaluated by long-term experiments. The drain back system proposed in this study was configured as a system with a control valve to modulate the amount of drained water when drain-back is called. The controller of the drain-back system allows the user to set the set point temperature and control whether to remain or discharge the working fluid inside the piping of the solar hot water system. In addition, the piping system was constructed so that a part of the working fluid pump power recovered by installing a micro hydro turbine with a capacity of 10 W at the end of the return pipe of the solar hot water system. In order to experimentally evaluate the reliability and usefulness of the drain back system to prevent overheating and freezing, long-term demonstration experiments were carried out to use tap water that is vulnerable to freezing and overheating as a working fluid. As a result of long-term experiments, the temperature inside the heat storage tank could be kept below the setting temperature of 68℃ in the summer season. Also, the freezing problem of the solar hot water system did not occur at all even when the outside temperature was continuously below -10℃ in the winter season.
제로에너지 주택의 그린리모델링을 위한 지붕일체형 BIPVT 모듈 개발 및 적용
주홍진(Hong-Jin Joo),김종규(Jong-Kyu Kim),안영섭(Young-Sub An),김민휘(Min-Hwi Kim),이왕제(Wang-Je Lee) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
본 연구에서는 플러스에너지커뮤니티 안의 플러스에너지 주택 구현을 위해 기존의 제로에너지 주택을 대상으로 그린리모델링을 수행하였으며 이를 위해 플러스에너지 주택의 지붕일체형으로 적용 가능한 서펜타인 액체식 평판형 BIPVT 모듈을 설계 및 제작하였다. 본 연구를 통해 설계 및 제작된 지붕일체형 BIPVT 모듈은 그린리모델링된 한국에너지기술연구원 KePSH-1에 정남향, 설치경사각 45˚ 로 총 13장의 BIPVT 모듈이 설치되었으며 전체 BIPVT의 전기적 용량은 4.29kWp이다. 이와 함께 BTPV 15.12kWp 용량의 360 W 블랙모듈 42장과 지붕면에 일체화 시키는 방식으로 BIPVT와 BIPV 시스템 설계 및 구축하였다. 본 연구를 통해 제작된 BIPVT 모듈은 하절기 과열 방지를 위해 모듈 상부와 하부의 통기구가 적용되었으며 상부 통기구의 개폐를 PVT 모듈 내부의 온도에 의해 Thermal Actuator가 작동하여 상부 통기구를 개방하는 과열장치 방식을 적용하였다. 이와 함께 BIPVT의 전기적 성능을 개별적으로 분석할 수 있도록 BIPVT 각 모듈마다 옵티마이저를 부착하여 13개 모듈의 개별 발전 성능을 분석하였다.
태양광열 복합 모듈을 활용한 공기열원 히트펌프 실외기 가열 시스템 개발
주홍진(Joo Hong-Jin),안영섭(An Young-Sub),이경호(Lee Kyoung-Ho) 한국태양에너지학회 2023 한국태양에너지학회 논문집 Vol.43 No.6
In this study, a convergence technology that can be linked with photovoltaic thermal (PVT) modules was derived to increase the performance and efficiency of air source heat pumps that are currently most widely used as cooling, heating, and domestic hot water supply equipment in public buildings. The solar energy and air source heat pump convergence technology developed through this study was an indirect supply type outdoor unit heating system that supplied heat energy acquired through a PVT module by increasing the temperature of the air flowing into the outdoor unit when the heat pump heating mode was operating. A bench-scale test device was designed and manufactured to verify the performance of the outdoor unit heating system of an air source heat pump using a PVT module. The performance evaluation confirmed that the heating performance of the air source heat pump was improved compared with that of the conventional air source heat pump without the heating system under the same test conditions. In addition, the heating demonstration was performed by applying the air source heat pump outdoor unit heating system using a PVT module to the air source heat pump installed at the Seodaemun Fire Station Hongeun 119 Safety Center, where an actual public building was remodeled. Consequently, the air source heat pump was heated. The analysis revealed that COP increased by more than 0.5.
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.