http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전상희,김호동,Chun, Sang-Hee,Kim, Ho-Dong 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.5
The effect of fiber content and fiber length on the tensile and flexural strength of basalt chopped fiber reinforced cement composite was investigated. The tensile and flexural strength of the cement composites were effectively improved by the addition of basalt chopped fiber. The cement composite reinforced with shorter fiber length showed the higher tensile strength. On the contrary, the flexural strength was increased with the increase of fiber length. Also basalt chopped fiber in saturated $Ca(OH)_2$ solution which is similar to the alkaline environment of cement hydration exhibited very low weight loss and high stability even after 3 months of immersion.
마이크로핀관의 확관 전후 증발열전달 특성에 관한 실험적 연구
전상희,황윤욱,윤석호,김민수 대한설비공학회 2000 설비공학 논문집 Vol.12 No.10
An experimental study on evaporative heat transfer characteristics in micro-fin tubes before and after expansion process has been performed with R-22. Single-grooved micro-fin tubes with outer diameter of 9.52 mm were used as test sections, and it was uniformly heated by applying direct current to the test tubes. Experiments were conducted at mass flow rates of 20 and 30 kg/hr. For each mass flow rate condition, evaporation temperature was set at 5 and $15^{\circ}C$and heat flux was changed from 6 to 11 kW/$m^2$ The evaporative heat transfer coefficient of micro-fin tubes after expansion is decreased because of the crush of fins and enlargement of inner diameter compared to that before expansion. Convective boiling effect decreased remarkably at higher quality range in the micro-fin tube after expansion, and the difference of the heat transfer coefficient in micro-fin tubes before and after expansion was greater for higher quality region. The evaporative heat transfer coefficient of the micro-fin tube after expansion was 19.9% smaller on the average than that before expansion.
전상희,최영욱,김민수 대한설비공학회 2016 International Journal of Air-Conditioning and Refr Vol.24 No.3
This paper presents the review on the boil-off gas re-liquefaction system of liquefied CO2 transport ship for carbon capture and sequestration (CCS). It is assumed that liquefied CO2 is transported between South Korea and Middle East for enhanced oil recovery (EOR) and enhanced gas recovery (EGR), which is similar to the oil and LNG transportation route. The concept of open re-liquefaction cycle which means that the boil-off CO2 is compressed, cooled, and expanded before being piped back into the tank is suggested. The effects of impurities on the re-liquefaction cycle is investigated under the condition of fixed cooling capacity in terms of cycle performance and reliability. Specifications of LCO2 transport ship about storage tank and re-liquefaction system is reviewed. In addition, economic feasibility is investigated. As for the case of the present study, negative effects of impurities on the cycle performance and reliability should be considered due to its considerable effects. Conservatively calculated internal rate of return (IRR) of the re-liquefaction system shows 4.1%, therefore, it can be guessed that the BOG re-liquefaction system will have economic validity in the future CCS chain.