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H<sub>2</sub>O/LiBr+HO(CH<sub>2</sub>)<sub>3</sub>OH계 공냉형 이중효용 흡수식 냉방시스템의 사이클 해석
권오경,문춘근,윤정인,Kwon, Oh-Kyung,Moon, Choon-Geun,Yoon, Jung-In 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.2
A cycle analysis was achieved to predict the characteristics by comprehensive modeling and simulation of an air-cooled, double-effect absorption system using a new $H_2O/LiBr+HO(CH_2)_3OH$ solution. The simulation results showed that the new working fluid may provide the crystallization limit 8% higher than the conventional $H_2O/LiBr$ solution. With a crystallization margin of 3wt%(weight%), the optimal solution distribution ratio was found in the range of 36 to 40%. Variation of cooling air Inlet temperature has a sensitive effect on the cooling COP and corrosion problem. The simulation of heat exchangers with UA value revealed that the absorber and the evaporator are relatively important for an air-cooled system compared with the condenser and the low temperature generator. The effect of cooling air flow rate, circulation weak solution flow rate and chilled water inlet temperature were also examined. The new working fluid may provide the COP approximately 5% higher than the conventional $H_2O/LiBr$ solution.
백승문(Seung-Moon Baek),심규진(Gyu-jin Shim),문춘근(Choon-Geun Moon),윤정인(Jung-In Yoon) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
An experiment is carried out in the present study to investigate the performance of Closed cooling tower with small diameter tube. The test section has a heat exchanger that consists of 15.88mm tubes with ten rows and columns and staggered arrangement. Cooling capacity and range was calculated with the changes of entrance of cooling water and conditions of fluid process. The results show operating cooling tower making a heat exchanger to block with multi path have high cooling capacity and range than using one path as a universal way.
백승문(Seung-Moon Baek),심규진(Gyu-jin Shim),문춘근(Choon-Geun Moon),윤정인(Jung-In Yoon) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
An experiment is carried out in the present study to investigate the performance of Closed cooling tower with small diameter tube. The test section has a heat exchanger that consists of 15.88㎜ tubes with ten rows and columns and staggered arrangement. Cooling capacity and range was calculated with the changes of entrance of cooling water and conditions of fluid process. The results show operating cooling tower making a heat exchanger to block with multi path have high cooling capacity and range than using one path as a universal way.
설원실,권오경,문춘근,윤정인,Seol, Won-Sil,Kwon, Oh-Kyung,Moon, Choon-Geun,Yoon, Jung-In 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.8
This research was concerned with the enhancement of heat transfer by surfactant added to the aqueous solution of LiBr. Different horizontal tubes were tested with and without an additive of normal octyl alcohol. The test tubes were a bare tube, floral tube and hydrophilic tube. The additive mass concentration was about 0.05${\sim}$5.5%. The heat transfer coefficient was measured as a function of solution flow rate for the range of 0.01${\sim}$0.034 kg/ms. The experimental results were compared with cases without surfactant. The enhancement of heat transfer by Marangoni convection effect generated by the addition of the surfactant is observed in each test tube. The increase of heat transfer coefficient by surfactant addition is about 35${\sim}$90% for bare tube, 40${\sim}$70% for the floral tube, 30${\sim}$50% for the hydrophilic tube and was higher for the cases with smaller a little solution flow rates.