Research into emissions of nitrogen oxides when converting the diesel engines to alternative fuels

Myroslav Panchuk,Mariia Hnyp,Liudmyla Kryshtopa,Sviatoslav Kryshtopa,Bohdan Dolishnii,Olena Skalatska

doi:10.15587/1729-4061.2018.124045

Abstract

We conducted theoretical and experimental research into emissions of nitrogen oxides in exhaust gases of the diesel engines, re-equipped for gas. The research is important because the emissions of nitrogen oxides in the exhaust gases are one of the biggest environmental problems at the present stage of development of designs for internal combustion engines. Therefore, reducing the emissions of nitrogen oxides in diesel engines by re-equipping them to gas fuel is an important task for specialists in design and operation of internal combustion engines. The result of theoretical research is the mathematical model that we constructed in order to calculate emissions of nitrogen oxides in the exhaust gases of diesel engines and the engines, converted to gas fuel. Based on experimental research, we have established dependences of emissions of nitrogen oxides in exhaust gases of the diesel engines, re-equipped for gas, on loading and the crankshaft rotation frequency. Studies have shown that diesel engines, which are converted to alternative gas fuel, reduce emissions of nitrogen oxides in the exhaust gases in a range from 13.9 % to 47.1 % depending on engine rotation and load. The results obtained make it possible to reduce the emissions of harmful substances in exhaust gases of automobile engines and optimize design of the systems for exhaust gases recirculation

Highlights

Oil reserves in the depths of the Earth constantly reduce
Many of the leading countries of the world are actively engaged in searching for alternative energy sources and the implementation of new technologies to increase the volumes of energy resources [1]
The aim of present study is to examine the emissions of nitrogen oxides in the exhaust gases of diesel engines and in engines re-equipped for gas fuel

Summary

Introduction

Oil reserves in the depths of the Earth constantly reduce. According to the optimistic forecasts, at existing explored reserves and current levels of oil extraction, petroleum will last for about fifty years. Studies show that diesel engines, which are converted to alternative fuels, have very high traction, dynamic and economic characteristics, and even significantly outperform basic diesel engines in terms of environmental impact This allows us to assert that in order to solve a comprehensive global task on reducing the consumption rate of liquid petroleum fuels, it is necessary to significantly increase the number of power drives with engines that run on alternative fuels. To this end, among other areas, it is required to create for engines of motor transport and other machines a technology for converting existing diesel power drives into gas engines. Reducing the levels of emissions of nitrogen oxides in diesel engines by their conversion to gas fuel is an important task for specialists in the field of design and operation of internal combustion engines

Literature review and problem statement

The aim and objectives of the study

Findings

Conclusions