Development of an Ignition System and Assessment of Engine Performance and Exhaust Characteristics of a Marine Gas Engine

Kichol Noh,Changhee Lee

doi:10.3390/su13084097

Abstract

In recent years, marine engine manufacturers have become increasingly interested in gas engines as an alternative to diesel engines to address rising crude oil prices and environmental regulations. In this study, a 1.6 MW dedicated gas engine was developed based on a diesel engine with bore 220, stroke 300. The developed gas engine had a precombustion chamber and exhibited excellent performance; the brake mean effective pressure was 2.1 MPa at 1000 rpm and NOx emissions were 50 ppm under 15% O2. In particular, it demonstrated excellent fuel economy with a thermal efficiency of 45%, and its carbon dioxide emissions were ~75% of the conventional diesel engines, thus demonstrating greenhouse gas reduction. These results indicate that suitably developed gas engines can provide a low-cost and energy-efficient alternative to diesel engines.

Highlights

The interest in natural gas engines as an alternative to diesel engines has intensified in recent years as crude oil prices have risen and global environmental regulations have become more stringent
The results showed that NO and CO2 emissions had decreased by 48% and 2.2%, while HC(hydro-carbon) and carbon monoxide (CO) emissions were increased by 46% and 34%, respectively
In the developed gas As aengine, high compression ratio in conventional diesel engines leads to knocking, we reduced a mixture was provided for the combustion chamber such that the overlap period the compression ratio in the gas engine

Summary

Introduction

The interest in natural gas engines as an alternative to diesel engines has intensified in recent years as crude oil prices have risen and global environmental regulations have become more stringent. Natural gas engines can improve thermal efficiency through lean combustion, owing to combustion of a wide range of fuels [1,2]; the low carbon content of the fuel reduces CO2 emissions, which is crucial in reducing greenhouse gas emissions [1,2]. Natural gas engines exhibit excellent fuel economy and low fuel costs. Natural gas is widely distributed worldwide and offers an advantage in terms of supply and demand. Many marine engine manufacturers have developed micropilot-type gas engines that inject diesel fuel only for ignition

Methods

Results

Conclusion