http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
축분뇨 액비 저장조의 운영실태 및 악취 물질 발생량 조사
김태일,송준익,정선,정종원,정의수,유용희,양창범,김민규,Kim T. I.,Song J. I.,Joung S.,Jeong J. W.,Chung E. S.,Barroga A. J.,Yoo Y. H.,Yang C. B.,Kim M. K. 한국축산환경학회 2005 축산시설환경학회지 Vol.11 No.3
본 연구는 국내에 설치되어 있는 액비저장조의 운영실태를 조사하고, 액비저장조에서 발생되는 악취물질을 구명하고자 수행하였다. 1. 국내에 200톤 규모의 액비저장조를 설치한 60 농가를 대상으로 한 본 조사에서 약 $93\%$가 액비저장조를 제대로 가동을 하고 있었으며 이중 $57\%$가 액비제조시 폭기 처리하고 있었다. 2. 조사 농가 중 년간 액비의 활용 횟수는 2회가 $50\%$로 나타났고 액비의 부숙 효과를 높이고 악취를 저감시키기 위한 목적으로 $64\%$가 미생물제제를 첨가하고 있었다. 반면에 액비 이용시 인력 장비의 비용 및 악취물질 발생 저감을 위한 첨가제 비용이 $43\%$로 조사되어 액비이용 시 문제점으로 지적되었다. 3. 액비 제조 형태별 악취물질 발현양상으로 호기 제조시 액비저장조내에서는 iso-valeric acid가 0.012에서 0.07ppm, Propionic acid가 $0.17\~2.85ppm$의 범위로 검지되었으며 혐기 제조시에는 n-Butyric acid가 1.5에서 2.3ppm, n-valeric acid가 $1.3\~1.8ppm$, acetaldehyde가 0.8에서 2.1ppm로 검지되어 호기 제조방법과 혐기 제조방법 모두 휘발성 지방산의 농도는 악취방지법의 규제농도 이상이었다. 부지경계선에서의 악취물질을 보면 호기시에는 미검출로 나타났고 혐기 제조시에는 Acetaldehyde가 $0.4\~0.9ppm$ 수준으로 검지되어 악취방지법의 규제농도를 초과였다. This study was carried out to determine the acceptability of liquid manure bin among livestock farmers and agricultural farmers, and quantify its malodorous compounds. The results were as follows; 1. The size of the manure bins owned by $93\%$ of 60 farmers surveyed was 200 M/T and were all in normal operation. Around $57\%$ of the normally operated bins were processed under aerobic condition. 2. Filly percent of the respondents utilized their liquid manure bin twice a year while $64\%$ used commercial microbial products to enhance maturity of their liquid manure and abatement of malodorous emissions. On the other hand, $43\%$ mentioned problems on the labor requirement, mechanical maintenance and lending cost of liquid manure processing and utilization, and the price of the commercial microbial products. 3. Malodorants emitted from livestock liquid manure bins and their boundary bin depended upon the livestock liquid manure processing condition. Within bin under the aerobic processing condition, Iso-valeric and propionic acid were ranged 0.012 to 0.07ppm and 0.17 to 2.85ppm, respectively. Within bin under the anoxic processing condition, n-butyric, n-valeric acid, and acetaldehyde were ranged 1.5 to 2.3ppm, 1.3 to 1.8ppm, and 0.8 to 2.1ppm, respectively. Malodorants emitted from the boundary of livestock liquid manure bins under the anoxic processing condition were detected the range of 0.4 to 0.9 ppm, more than the concentration of law regulation, as an acetaldehyde, but under the aerobic processing condition, they did not any detection.
김민규(M. K. Kim),이정기(J. G. Lee),김익수(I. S. Kim),정주영(J. Y. Jeong),오창수(C. S. Oh) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
In this paper. a method to assess the reliability of an insulating spacer used in gas insulated switchgear by electrical accelerated lifetime test is represented. And a test plan to assure the expected lifetime with 90 % confidence level is also included.
김민규(M. K. Kim),허대행(D. H. Huh),김익수(I. S. Kim),장진영(J. Y. Jang),문병철(B. C. Moon),고재철(J. C. Go) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.5
This paper describes a method to estimate the thermal lifetime of coil used in the dry-type molded transformer which is widely used in the domestic distribution system. In order to reduce the testing time. temperature accelerated aging test is planned Finally, the thermal lifetime estimation method is composed of a temperature aging test and a cyclic test of temperature, humidity and lightning impulse voltage withstand test.
김민규(M.K. Kim),김재식(J.S. Kim),방상석(S.S. Bang),최재호(J.H. Choi) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
This paper describes the PWM-VSI controller of three-phase UPS system using stationary reference frame This controller meets the specification the UPS inverter output voltage even under the unbalanced or nonlinear load. This controller is also constructed with duble control loop of the outer voltage control loop and the inner current control loop For the fast response of the output voltage control, yhr inner current control loop of the capacotor current os used To get the good property against overshoot, the IP controller us used. The outer voltage controller IS designed with P controller and the high gain transfer function is used for the zero steady state error. All control gains of both controller is designed base on the CDM method
[디젤엔진부문] 직접 분사식 디젤 기관의 단공 연료 인젝터의 미립화 특성에 관한 실험적 연구
김민규(M.K. Kim),이기형(K.H. Lee),이창식(C.S. Lee) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The work describes the spray characteristics of single hole injector in the direct injection type diesel engine. The characteristics of fuel spray such as droplet size and velocity were measured by phase Doppler particle analyzer. The influence of injection pressure on the droplet size shows that the higher injection pressure results in the decrease of mean droplet diameter. The minimum droplet size of fuel spray appears on the location of 40mm axial distance from nozzle tip of fuel injector. The correlation between the droplet size and axial velocity of the fuel spray due to the change of axial and radial distance were discussed..
GDI 엔진 인젝터의 연료 분무 거동 및 액적 분포 특성
김민규(M . K . Kim),이창식(C . S . Lee),이기형(K . H . Lee),진 다시앙(D . Jin) 한국분무공학회 2001 한국액체미립화학회지 Vol.6 No.2
This paper describes the macroscopic behavior and atomization characteristics of the high-pressure gasoline swirl injector in direct-injection gasoline engine. The global spray behavior of fuel injector was visualized by shadowgraph technique. The atomization characteristics of gasoline spray such as mean diameter and mean velocity of droplets were measured by the phase Doppler particle analyzer system The macroscopic visualization and experiment of particle measurement on the fuel spray were investigated at 7 and 10 MPa of injection pressure under different spray cone angle. The results of this work show that the geometry of injector was more dominant over the macroscopic characteristics of spray than the fuel injection pressure and injection duration. As for the atomization characteristics, the increase of injection pressure resulted in the decrease of fuel droplet diameter and the atomization characteristics differed as to the spray cone angle. The most droplets had under 25㎛ diameter and for the large droplets(upper 40㎛) as the spray grew the atomization presses were very slow. Comparison results between the measured droplet distribution and the droplet distribution functions revealed that the measured droplet distribution is very closed to the Normal distribution function and Nukiyama-Tanasawa`s function.