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RISS 인기검색어
- 검색키워드
- 저자 : Jong Hyeon Peck (검색결과 71 건)
- 무료
- 기관 내 무료
- 유료
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MEASUREMENT OF ICE PACKING FACTOR OF AQUEOUS SOLUTION WITH ICE SLURRY USING REFRACTIVE INDEX
JONG HYEON PECK,강채동,홍희기 대한설비공학회 2010 International Journal Of Air-Conditioning and Refr Vol.18 No.2
In the present work, a new method is proposed for the measurement of the ice packing factor (IPF) of an ice slurry using the index of refraction. The purpose of the new method is to improve the resolution of the measurement and to increase its resistance to electric noise as compared to the standard IPF measurement technique that relies on the measurement of the freezing temperature. These two methods are similar in that they both obtain a concentration of aqueous solution from the measured physical quantities and calculate the IPF using the relationship between concentration and IPF. Both methods were also compared with the results from the calorimeter method obtaining the IPF directly. The two methods are in good agreement (within 5%), which demonstrate the validity of the newly proposed method.
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REAL-TIME MEASUREMENT OF ICE CONCENTRATIONS IN ICE SLURRY FLOW
JONG HYEON PECK,홍희기,강채동 대한설비공학회 2010 International Journal of Air-Conditioning and Refr Vol.18 No.2
An experimental study was performed to measure the ice concentration of an ice slurry pipe flow in real time. In the present work, we suggest a refractive index measurement method and compare it to freezing point and density measurement methods. To measure the refractive index of the solution, ice particles in the ice slurry should be completely removed and a hydro-cyclone was used in this study instead of a mesh. The results from the measurement method by the refractive index coincided with those by the density within a ±5% error range when the real-time solution density was used. Even though the density measurement method showed good resolution, the results using the initial density of the solution were more than 10% in error compared to those using the real-time density. And the density measurement method has an error range 1.5 times greater than the refractive index measurement method.
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REAL-TIME MEASUREMENT OF ICE CONCENTRATIONS IN ICE SLURRY FLOW
Peck, Jong-Hyeon,Hong, Hi-Ki,Kang, Chae-Dong The Society of Air-Conditioning and Refrigerating 2010 International Journal Of Air-Conditioning and Refr Vol.18 No.2
An experimental study was performed to measure the ice concentration of an ice slurry pipe flow in real time. In the present work, we suggest a refractive index measurement method and compare it to freezing point and density measurement methods. To measure the refractive index of the solution, ice particles in the ice slurry should be completely removed and a hydro-cyclone was used in this study instead of a mesh. The results from the measurement method by the refractive index coincided with those by the density within a ${\pm}$5% error range when the real-time solution density was used. Even though the density measurement method showed good resolution, the results using the initial density of the solution were more than 10% in error compared to those using the real-time density. And the density measurement method has an error range 1.5 times greater than the refractive index measurement method.
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MEASUREMENT OF ICE PACKING FACTOR OF AQUEOUS SOLUTION WITH ICE SLURRY USING REFRACTIVE INDEX
Peck, Jong-Hyeon,Kang, Chae-Dong,Hong, Hi-Ki The Society of Air-Conditioning and Refrigerating 2010 International Journal Of Air-Conditioning and Refr Vol.18 No.2
In the present work, a new method is proposed for the measurement of the ice packing factor (IPF) of an ice slurry using the index of refraction. The purpose of the new method is to improve the resolution of the measurement and to increase its resistance to electric noise as compared to the standard IPF measurement technique that relies on the measurement of the freezing temperature. These two methods are similar in that they both obtain a concentration of aqueous solution from the measured physical quantities and calculate the IPF using the relationship between concentration and IPF. Both methods were also compared with the results from the calorimeter method obtaining the IPF directly. The two methods are in good agreement (within 5%), which demonstrate the validity of the newly proposed method.
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하수 슬러지 폐열원을 이용한 재생 에너지의 경제성 평가
이종호(Jong Ho Lee),박승상(Shung Sang Park),백종현(Jong Hyeon Peck),이수양(Soo Yang Lee),김봉진(Bong Jin Gim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
In this study, economic evaluation of the waste heat recovery system combined with heat exchanger and the high temperature heat pump was suggested and investigated. It was designed that the system used the heat of wastewater from sludge-drying process. Based on the annual heat production of the system, bunker-C oil boiler and LNG boiler of the same capacity are compared, respectively. As a result, when the system operates for 15 years, payback period of this system predicts about 2.6~3.2 years in bunker-C oil boiler and about 2.7~3.4 years in LNG boiler, respectively.
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Measurement Methods of Latent Heat for PCM with Low Melting Temperature in Closed Tube
Hong Hiki,Kang Chaedong,Peck Jong Hyeon The Society of Air-Conditioning and Refrigerating 2004 International Journal Of Air-Conditioning and Refr Vol.12 No.4
Cycle test for developed phase change material (PCM) is necessary in order to assess the variation of latent heat, which decreases with time by deterioration. T-history method and measurement using heat-flux meter are appropriate for the cycle test in a tube filled with PCM because they do not need an extraction of sample in measuring heat of fusion. In the present study, these methods were applied to a PCM having a melting point below a room temperature, different to the past studies for PCMs melting above a room temperature. As a result of experiment using pure water as specimen, we can obtained rea-sonable values for heat of fusion.
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