A Study on the Reduction of $NO_x$ Emission from Dual Fuel Engine for Co-generation System

열병합발적용 Dual Fuel Engine의 질소산화물 배출저감에 관한 연구

  • 정일래 (국립서울산업대학 산업대학원 환경공학과) ;
  • 김용술 (국립서울산업대학 산업대학원 환경공학과) ;
  • 심용식 (국립서울산업대학 산업대학원 환경공학과)
  • Published : 1991.05.01

Abstract

This study shows the correlation between $NO_x$ emission in the exhaust gas and various operation factors of dual fuel engine for Co-generation system. General tendency was shown that the thermal efficiency was lowered by the change of operation factors. However these were not confirmed on this experiment. Increasing T4 temperature (exhaust gas temperature at turbo-charger inlet) reduces $NO_x$ emission rate. The higher T4 temperature requires lower excess air as the excess air ratio is controlled by T4 temperature on gas mode operation. Another tendency was that $NO_x$ emission rate is reduced in case of increasing boost air temperature, quantity of pilot oil or bypassing flue gas through the exhaust gas boiler. The diameter of the fuel injection nozzle was changed smaller than design value and the injection timing was readjusted. Thus $NO_x$ emission rate could be reduced as retarding injection timing and changing hole diameter of fuel injection nozzle, however maxium engine out-put was decreased by changing fuel nozzle on the diesel mode operation.

Keywords

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