| 제목 |
디젤 우레아 SCR 시스템의 우레아 해동 성능 개선을 위한
냉각수 파이프 형상 설계 연구 |
| 분야 |
열유체 및 공조시스템(HVAC) |
| 언어 |
Korean |
| 저자 |
정석훈(한국자동차연구원), 김현준(한국자동차연구원), 김락민(한국자동차연구원), 권오현(대동공업), 박은용(TESK), 김응율(세성), 강정호(한국자동차연구원) |
| Key Words |
Engine coolant(엔진냉각수), Exhaust gas consecration system(배기가스 정화 장치), Heat transfer(열전달), Thaw(해동), Phase change(상변화), Urea water(요소수) |
| 초록 |
The performance of the urea thawing system, which utilizes engine coolant as the heat source, highly depends on the coolant conditions(mass flow rate and temperature) and the coolant pipe configuration. Therefore, in this study, the coolant condition of the EPA test cycle result was introduced to set a realistic heating condition, and four heating pipe configurations were compared to provide insight on designing a urea coolant pipe. To build a boundary condition of a numerical model of the urea heating system, an experiment for the base configuration was conducted, and its numerical model was verified by comparing the amount of thawed urea with the experiment result. Interestingly, case 4(the center return pipe configuration) showed the largest thawed urea in the initial 40 minutes after engine start-up, but case 2(the outer return pipe configuration) had the largest afterwards. |
| 원문(PDF) |
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