• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.3
• /
• pp.380-389
• /
• 2020

The conversion characteristics and fuel properties for producing biodiesel (BD) by blending beef-tallow, an animal waste resource with a high-saturated fatty acid content, and sunflower-oil, a vegetable oil with a high-unsaturated fatty acid content, were investigated. For this investigation, the effects of the control factors, such as the oil-blend ratio and methanol-to-oil molar ratio, on the fatty acid methyl ester and BD production yield were also investigated. The kinematic viscosity reduction effects of BD using heating and ultrasonic irradiation were verified, and the optimal temperature of each BD-diesel fuel blend for reducing the kinematic viscosity was derived using the correlation equation. As a result, the optimal conditions for producing blended biodiesel were verified to be TASU7 and a methanol-to-oil molar ratio of 10:1. The analysis results of the fuel properties of TASU7 satisfied the BD quality standard; hence, the viability of BD blended with waste tallow as fuel was verified. The experimental results on the kinematic viscosity reduction showed that heating is more effective in reducing the kinematic viscosity because it took less time than ultrasonic irradiation, and the equipment was cheaper and more straightforward than the ultrasonic irradiation method.

• Proceedings of the Korean Society for Applied Microbiology Conference
• /
• 1976.10a
• /
• pp.190.1-190
• /
• 1976

맥주의 한sod 혼탁방지용으로 널리 사용되고 있는 papain을 미생물 효소로써 대치할 목적으로 토양에서 분리한 148주의 균주가운데서 Bacillus 속이라고 추정되는 한 균주를 선택하여 효소를 생산하였다. 이 효소는 제탁 능력에 있어서 시판의 protesal에 비등하며 저장시에는 pH7-8, 온도 $35^{\circ}C$ 이하에서 안정성이 확인되어 충분히 실용가치가 있는 것으로 본다.

• 프린팅코리아
• /
• v.11 no.8
• /
• pp.84-91
• /
• 2012

모든 생명에는 수명이 있고, 시작이 있으면 끝도 있다. 회사도 다르지 않다. 아니, 회사의 생존은 더 험난하다고 할 수 있다. 모든 회사가 미래의 희망을 안고 문을 열지만, 대부분 10년도 안 돼 사라지는 것처럼${\cdots}$. 이런 척박한 생존경쟁의 환경에서도 100년 동안 흔들림 없이 한길을 걸어 온 회사가 있다. 오는 8월 15일 정확하게 100번째 생일을 맞는 인쇄업계 최고(最古)의 역사를 자랑하는 보진재가 그 주인공이다.

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2015.11a
• /
• pp.193-193
• /
• 2015

도금공정에 있어서 전처리는 제품품질을 확보하는데 중요한 단계이다. 전처리 공정의 주요인자중 처리액의 온도, 처리시간, 교반력, 오염도를 개선함으로써 제품의 산화막 및 오염물질을 효과적으로 제거할 수 있었다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.2
• /
• pp.472-477
• /
• 2017

Oil spills cause a lot of damage to the environment. Oil destroys the water environment and ecosystem in a very short period of time once they are contaminated by it, it takes a lot of time to recover from the contamination and the cleaning process is very difficult. Therefore, oil detectors are greatly needed as they can monitor any oil spills over the sea, rivers, and lakes. There are two kinds of technology available for detecting oil, viz. the contact and non-contact types. The former is based on the use of the conductivity, capacitance and microwaves, while the latter employs infrared, UV, laser, optic and radar technologies. As there are also various hurdles in the measuring of oil on water, such as the presence of waves, refraction of light, temperature and saltiness, it is imperative to select the right oil detector which is appropriate for the specific environment. In this study, a contact type oil detector is developed, which can be used in oil related industries, such as refineries, petrochemical companies, and power generation stations. The detector is made up of the sensor module, which floats on the water, and the controller which processes the signal coming from the sensor module and displays it. It is designed in such a way that the existence of oil is detected through the sensor and the change in the permittivity is observed to determine the volume and type of spilled oil.

• Resources Recycling
• /
• v.17 no.3
• /
• pp.35-41
• /
• 2008

The study of coking technology to upgrade oil sand bitumen which is considered as alternative fuel was performed by using thermogravity analyzer and delayed coking reactor(600ml). To analyzed and compared coking characteristics of oil sand bitumen, the reactivities of oil sand bitumen were measured in the TGA. At the temperature conditions of $400{\sim}550^{\circ}C$ and the temperature rising velocity of $50^{\circ}C/min$. the termination time of coking reaction and conversion efficiencies increased with an increase of bed temperature. However the increase rate decreased over $450^{\circ}C$. So the coking reaction with oil sand bitumen might be over $450^{\circ}C$. Also the termination time decreased with increasing the temperature rising velocity. But the content of coke increased with increasing temperature rising velocity. At the experiments in the delayed coker, the temperature condition at maximum oil yield was $475^{\circ}C$ and the fuel properties of oil from coking reaction was almost equal with conventional diesel. It was verified that the coking process might be useful process to upgrade the oil sand bitumem by using API and SIMDAS.

• 한국방재학회:학술대회논문집
• /
• 2010.02a
• /
• pp.91.2-91.2
• /
• 2010

지면-대기상의 관계에서 지중온도와 토양수분의 역할이 중요함에도 불구하고 이들 변수의 다양한 시공간적 변동성, 관측자료의 한계, 관련자료 및 이해 부족 등으로 인하여 아직까지 체계적인 연구가 이루어지지 못하고 있다. Idso 등(1975)에 의해 처음 토양수분과 지중온도에 대한 연구를 시작으로 Lakshmi 등(2003)은 지중온도가 토양수분과 역의 관계를 가짐을 도출하였으며 이를 이용한 선형회귀분석을 수행하여 토양수분을 예측하였다. 기존연구를 바탕으로 본 연구에서는 설마천 타워(Flux tower)에서 기록된 지중온도와 토양수분 자료를 이용하여 사계절에 따른 상관관계를 분석하였다. 조사기간 동안 토양수분은 봄부터 가을까지의 경우 지중온도가 강한 음의 상관계수를 가지는 반면 겨울의 경우 지중온도와 강한 양의 상관계수를 가지는 것으로 판단이 되었다. 즉, 계절에 따라 지중온도와 토양수분의 관계가 차이가 있음을 알 수 있다. 또한, 본 연구에서 토양수분에 대한 지중온도의 계절별 선형적 관계를 도출하였으며 지표상의 물 에너지 순환에 대한 보다 나은 이해를 줄 것으로 사료된다.

• Journal of Satellite, Information and Communications
• /
• v.9 no.2
• /
• pp.33-37
• /
• 2014

This paper propose a method to sort flame regions and non-flame regions in a color image based on temperature Characteristics of flame. The traditional algorithms simply detect flame regions those are colored between yellow and red and there are lot of false detection in this method. But the colors of real flame are fallen between white and red and flame color variation over the flame. In this paper, it reduce false detection by separating colors according to temperature Characteristics of flame. The proposed method firstly finds a color model to express the temperature Characteristics of fire and then the color model is non-linearly quantized based on color values and analyzed using histogram and finally detect the candidate flame regions. The proposed method has 71.8% of matching rate and if it is compared with non-matching rate of traditional algorithms, the non-matching rate is improved by 27 times than others.

• Korean Journal of Remote Sensing
• /
• v.31 no.6
• /
• pp.583-598
• /
• 2015

This paper presents derivation of background temperature from geostationary satellite and its validation based on ground measurements and Geographic Information System (GIS) for future use in weather and surface heat variability. This study only focuses on daily and monthly brightness temperature in 2012. From the analysis of COMS Meteorological Data Processing System (CMDPS) data, we have found an error in cloud distribution of model, which used as a background temperature field, and in examining the spatial homogeneity. Excessive cloudy pixels were reconstructed by statistical reanalysis based on consistency of temperature measurement. The derived Brightness temperature has correlation of 0.95, bias of 0.66 K and RMSE of 4.88 K with ground station measurements. The relation between brightness temperature and both elevation and vegetated land cover were highly anti-correlated during warm season and daytime, but marginally correlated during cold season and nighttime. This result suggests that time varying emissivity data is required to derive land surface temperature.

• Korea lubricating oil industries association bulletin
• /
• no.17
• /
• pp.15-20
• /
• 1986