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임준형(Junhyoung Im),주영철(Youngcheol Joo),이주헌(Joohun Lee),김창교(Changkyo Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
A lever type NO₂ micro gas sensor was fabricated by MEMS technology. In order to heat up the gas sensing material to a target temperature, a micro heater was built on the gas sensor. The sensing material laid on the heater and electrodes and did not contact with the silicon base to minimize the heat loss to the silicon base. The electric power to heat up the gas sensor to a target temperature was measured. The temperature distribution of micro gas sensor was analyzed by a CFD program. The predicted electric power of micro heater to heat up the sensing material to the target temperature showed a good agreement with the measured data. The design of micro gas sensor could be modified to show more uniform temperature distribution and to consume less electric power by optimizing the layout of micro heater and electrodes.
마이크로 핫플레이트를 갖는 마이크로 가스센서의 열적성능에 관한 연구
朱永哲(Youngcheol Joo),任俊炯(Junhyoung Im),李周憲(Joohun Lee),金昌敎(C.K. Kim) 대한전기학회 2006 전기학회논문지C Vol.55 No.5
A micro hotplate for micro gas sensor was fabricated by MEMS technology. In order to heat up the gas sensing material to a target temperature, a micro hotplate was built on the gas sensor. The sensing material was deposited on the heater and electrodes, and did not contact with the silicon base to minimize the heat loss to the silicon base. The electric power to heat up the gas sensor was measured. The temperature distribution of micro gas sensor was analyzed by a CFD program. The predicted electric power to heat up the sensing material showed a good agreement with the measured data. The design of micro gas sensor could be modified to increase the temperature uniformity and to decrease the electric power consumption by optimizing the lavout of micro hotplate and electrodes.
배기저감장치의 촉매선단 입구 길이 변화에 따른 성능특성
정석윤(Seokyoon Jeong),임준형(Junhyoung Im),김상만(Sangman Kim),김혜삼(Hyesam Kim),김경훈(Kyunghun Kim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The main constituents of exhaust gas emitted from a vehicle are Nitrogen and Vapor and others include Carbon Dioxide, Carbon Monoxide, Hydrocarbon, Nitrogen Oxide, Particulates. and SO₂. As the countermeasures to this exhaust gas, there are SCR directly resolving NOx, DOC oxidizing HC and CO by using O₂. and DPF removing PM accumulated on filter. In this research, we are about to study each performance characteristic on the front of catalyst inlet on the change of shape for exhaust reduction device.