A Study On The Characteristic And Calculational Method Of Emissions Of Nitric Oxides In Marine Diesel Engine

In this paper, the effect factors for marine diesel NOx Emissions are analyzed from engine structure, fuel oil and intake air conditions; The condition of the stand test, the standard of instruments and the measurement are described clearly; A set of formula are studied, which calculate exhaust mass flow and NOx mass emissions by simple carbon balance, general carbon balance and oxygen balance methods; And the suitable condition and object are discussed. The dry to wet factor for exhaust gas and the NOx correction factor for atmospheric are induced. On this base, a computer program which contains both functions of the standard calculation and the analyzing calculation is accomplished. Using the simple carbon balance method, two sets data have been calculated, and the calculations confirmed that deviation are no more than 5% in the case of neglecting the substances of incomplete combustion. The work is helpful to perform Annex VI to MARPOL Protocol.