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Shell & Tube형 열교환기의 열전달 및 유동에 대한 수치해석
신용한(Yong-Hna Shin),정홍도(Hong-Do Jeong),이점호(Jeam-Ho Lee),정한식(Han-Shik Chung),정효민(Hyo-Min Jeong) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
The shell and tube heat exchangers were introduced to apply to a big capacity condenser and a high pressure feed water heater for power plant in the beginning of 1990s. Design and manufacturing technology for shell and tube heat exchangers have been developed until now. The flow and temperature fields inside the shell and tube are resolved using a commercial CFD package. The effect of the baffle spacing to shell diameter ratio on the heat exchanger performance is investigated by varying flow rate in shell side.
박진관(Chen Kwan Park),신용한(Yong Han Shin),우주식(Ju Sik Woo),정효민(Hyo Min Jeong),정한식(Han Shik Chung) 한국지열·수열에너지학회 2011 한국지열에너지학회논문집 Vol.7 No.1
Renewable energy is growing based on low-carbon green energy government policies. According to this policy, geothermal energy is highly efficient and environmental friendly energy which is being recently expanded. However, construction companies are generated disorderly but their ability has not been verified due to the poor geothermal facility which was reported in the media. In the this paper introduce on Busan region's largest geothermal facility, it was confirmed that thermal efficiency of the underground is close to heat exchanger performance. Therefore the study improving the efficiency of underground heat exchange found progressed. The results showed voids between borehole and ground heat exchanger should not be raised. And then geothermal facilities were installed very successfully through the principle grouting operation. As compared to the energy consumption on the basis of operating results energy usage was less than any other heat sources.
세계의 신ㆍ재생에너지 정책 동향 및 폐열회수시스템의 특허분석
김철표(Churl Pyo Kim),신용한(Yong Han Shin),지명국(Myoung Kuk Ji),최창수(Chang Su Choi),장백선(Baek Seon Jang),정한식(Han Shik Chung),정효민(Hyo Min Jeong) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
This research was a disappeared primary energy source for foreign decrease dependence on each country in the world for new and renewable energy policy trends. Each country policy is important in new renewable energy and for research and development; a lot of cost and investment, the long-term development plan for the acquisition of independent technology will be the biggest were aiming. Energy overseas reliance accounted for over 95% of that in case of The introduction of a reliable energies and Aggressive overseas energy often development presented the direction that the 2030, aiming at the level of 40%. Waste heat recovery patent analysis from 2001 to 2009 last 10 years, destination country, Korea, the United States, Japan, Europe on the register about patents. Classification technology by air conditioning system registers of patents concerning incidents, 474 (36.5%) the most high, the various main agents share look corporate (including foreign companies) 62.9% the most high, as personal share 28.2%,public institutions and universities share 8.9% were able to know that.