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천진옥(Jin Ok Chun),성현주(Hyun Joo Sung),전용철(Young Cheol Jeon),이명석(Myung Seok Lee),김우중(Woo Joong Kim) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.2
Primary gastrointestinal lymphoma primarily confined to gastrointestinal tract is relatively rare disease accounting for approximately 1 4 percent of all gastrointestinal malignant dis- ease, and the concurrent malignant lymphoma of the stomach, duodenum and colon, especially cecum is very rare in reported cases. We had experienced a 43 years old man with malignant lymphoma of the stomach and duode- num and cecum, and he was treated by chemotherapy (MACOP B). So, we reported here with review of literatures. (Korean J Gastroenterol 1994; 26: 353 357)
흡열판의 종류에 따른 UnglazedPVT 모듈의 성능 실험 분석
천진아(Chun, Jin-Aha),정선옥(Jeong, Seon-Ok),김진희(Kim, Jin-Hee),김준태(Kim, Jun-Tae),조인수(Cho, In-Soo),남승백(Nam, Seung-Baeg) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.11
A photovoltaic/thermal(PVT)collector produces both thermal energy and electricity simultaneously. The heat from PV modules should be removed for better electrical performance, and can be converted into useful thermal energy. A PVT module is a combination of PV module with a solar thermal collector which forms one device that converts solar radiation into electricity and heat. In general, there are two different types of PVT module:glazed PVT module and unglazed PVT module. On the other hand, two types of the PVT module can be distinguished according to absorber on PV module rearside: the sheet-and-tube absorber PVT module and the fully wetted absorber PVT module. The absorber collector plays an important function in PVT system. It cools down the PV module, while collecting the thermal energy produced in the form of hot water. The aim of this study is to compare the electrical and thermal performance of two different PVT collectors, one with the rectangular tube and the other with fully wetted absorber PVT collectors. For this paper, the PVT collectors with two different types of thermal absorber were made, and both the thermal and electrical performance of them were measured in outdoor, and the results were compared. The experimental results were analyzed that the thermal efficiency of the fully wetted absorber PVT collector is about 8.7% higher than the sheet-and-tube absorber PVT collector, and for the electrical efficiency, the fully wetted absorber PVT collector had about7% higher than the rectangular tube absorber.
사각튜브부착형 흡열판을 적용한 Unglazed PVT 복합모듈의 열적 전기적 성능분석
정선옥(Jeong, Seon-Ok),천진아(Chun, Jin-Aha),김진희(Kim, Jin-Hee),김준태(Kim, Jun-Tae),조인수(Cho, In-Soo),남승백(Nam, Seung-Baeg) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.11
The heat from PV modules should be removed for better electrical performance, and can be converted into useful thermal energy. A photovoltaic-thermal(PVT)module is a combination of PV module with a solar thermal collector which forms one device that converts solar radiation into electricity and heat simultaneously. The performance of the PV/Thermal combined collector module is directly influenced by solar radiation that also has an effect on PV module temperature. It is also has believe that the energy performance of PV/T collector is related to absorber design as well as PV module temperature. The existing study has been paid to the PV/Thermal combined collector module with circle tube absorbers. The aim ofthis study is to analyze the experimentalperformance ofthe PV/Thermalcombined collector rectangular tube absorbers according to solar radiation. The experimental result show that the average thermal and electrical efficiencies o fthePVT collector were 43% and14.81% respectively. Solar radiation is one of the most influential factors to determine the energy performance of PVT collector, but from a certain level of solar radiation the PVT collector receives on, its efficiencies began to decrease.