輕油 粒子狀物質 濾過裝置의 排氣低減性能에 關한 硏究

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경유|여과장치|배기저감성능|Particulate Filter|Diesel
As the motor vehicle emission regulation becomes stricter due to the accelerated global warming and air pollution all over the world, diesel engine which has high efficiency and low CO2 emission is being revaluated as the solution. But diesel engine has disadvantage in high toxic emissions such as Particulate Matter(PM) and NOx which are very difficult to reduce simultaneously. Although diesel emission control technology such as precise injection timing control, a common-rail high pressure fuel system and an alternative fuel has been improved, the diesel engine is still difficult to meet the future regulation which is stricter than EURO 5. Since it is quite difficult to meet post-EURO 5 regulation with pre-processing technology such as improvement of engine performances, aftertreatment technology such as Diesel Particulate Filter(DPF) or Selective Catalyst Reduction(SCR) should be developed to reduce PM and NOx. Although the strict management of newly manufactured motor vehicles is important, the management of in-use diesel vehicles, especially in metropolitan region where a large number of motor vehicles are running, is another important factor for controlling air pollution.
Trying to reduce the emissions of PM, Korean Ministry of Environment(MOE) has implemented the retrofit program which has installed the Diesel Oxidation Catalyst(DOC) and DPF in light-duty and heavy-duty diesel vehicles, respectively.
When DPF for heavy duty vehicles is applied to medium and light duty vehicles such as county buses, the regeneration efficiency and the performance and fuel consumption efficiency of motor vehicles are getting down.
So in order to reduce the emissions from medium duty truck which is difficult to apply DPF, the Partial Diesel Particulate Filter(PDPF) which has better motor vehicle performances and fuel consumption efficiency than DPF by reducing the resistance of exhaust flow and the load to engine or motor vehicle instead of lowering PM filtering efficiency by 50~60% with opening PDPF passage, was developed and the performance evaluation was also carried out.
PDPF uses the corrugated layer blades which have three dimensional geometry and captures particulate matter by making some part of exhaust gas pass through porous fleece layer.
For the evaluation for PDPF, reduction efficiency test, durability test, property test and smoke test(Lug down 3 mode) were executed. PDPF reduced 56.3% of PM, 98.3% of CO, 93.6% of HC and 4.3% of NOx in ND-13 emission mode test. PDPF slightly affected maximum engine power and fuel consumption efficiency, but did not exceed the standard value of 5%. In property test before and after DPF set up, the difference of emission reduction efficiencies and the variation of temperature and pressure in up-and-down streams of PDPF is negligible. With these property test results, the performance of durability could be confirmed. In the Lug Down 3 mode test under the condition of 100, 90, 80% of engine rated speed using engine dynamometer, PDPF has shown smoke reduction of 50.4% in smokemeter and 54.4% in opacimeter, which confirms over 50% reduction efficiency in both smoke measurement methods.
Because PDPF has higher durability and safe performance than DPF for heavy duty trucks of which main driving cycles are low speed and high load, PDPF technology could be available to the medium and heavy duty vehicles that DPF could not be applied to.
Alternative Title
A Study on Performance Evaluation of Emission Reduction in a Diesel Particulate Filter
Alternative Author(s)
Park, Yong-hee
조선대학교 대학원
일반대학원 국립환경연구원협동과정
Awarded Date
Table Of Contents
제1장 서론 = 1
제1절 연구 배경 = 1
제2절 자동차배기가스 관리 동향 = 2
제3절 연구 목적 = 4
제2장 이론적 고찰 = 5
제1절 경유 입자상물질 여과장치의 연구동향 = 5
제2절 경유 입자상물질 = 8
1. 정의 = 8
2. 경유 입자상물질의 구성 = 8
3. 경유 입자상물질 여과장치 = 10
4. 경유여과장치 = 17
제3절 매연정화장치의 종류 = 26
1. 디젤산화촉매(DOC : Diesel Oxidation Catalyst) = 26
2. 경유촉매 입자상물질여과장치(CDPF) = 35
3. CRT필터 = 43
4. 연료첨가제방식 매연정화장치 = 52
5. 전기히터방식 매연정화장치 = 55
제3장 실험장치 및 방법 = 59
제1절 배기정화장치 = 59
1. PDPF의 원리 = 59
2. PDPF의 종류 = 60
3. 배기정화장치의 구성 = 62
제2절 실험엔진 및 장치 = 67
1. 실험엔진 = 67
2. 실험장치 = 67
제3절 실험방법 = 71
1. 배기가스 정화시험 = 71
2. 내구시험 = 74
3. 재생평형온도(BPT) 시험 = 74
4. 저온 검댕 포집시험 = 75
5. ETC 모드에 의한 배기가스 정화시험 = 75
6. 매연시험(Lug down-3 모드) = 76
7. 실차시험 = 76
제4장 결과 및 고찰 = 79
제1절 제거율시험 결과 분석 = 79
1. 기본성능시험 = 79
2. 제거율시험 = 81
3. 입자상물질 포집율(50% 이상)의 세부산출 근거 = 83
제2절 내구시험 = 84
1. 내구시험 결과분석 = 84
2. 장치의 내구성 = 86
제3절 재생평형온도 시험 = 87
1. 재생평형온도(Balance Point Temperature)시험 = 87
2. NO₂에 의한 매연 재생가능온도 = 88
3. 재생가능온도(Light-Off Temperature) = 90
제4절 저온 검댕 포집시험 = 91
제5절 ETC 모드에 의한 배기가스 제거율 = 95
1. ETC 모드(European Transient Cycle) = 95
2. 배기가스 제거율 = 97
제6절 매연측정실험 = 99
제7절 실차시험에 따른 제거율시험 결과분석 = 101
1. 주행패턴에 따른 온도분포 = 101
2. 배출가스 제거율 = 103
3. 실차시험의 배기온도, 배압 및 주행속도 = 104
4. PDPF장착이 엔진의 성능에 미치는 영향 = 106
제5장 결론 = 107
1. 배기가스 정화시험 = 107
2. 특성시험 = 107
3. 실차시험 = 108
참고문헌 = 110
조선대학교 대학원
박용희. (2007). 輕油 粒子狀物質 濾過裝置의 排氣低減性能에 關한 硏究.
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General Graduate School > 4. Theses(Ph.D)
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