Abstract
<div class="section abstract"><div class="htmlview paragraph">The need for a quick reduction in greenhouse gasses and noxious emissions is pushing maritime transportation to increase the use of alternative fuels. Natural Gas (NG) is well recognized as an effective solution to limit the use of marine diesel oil in the short/mid-term. In this scenario, dual-fuel technology is used to enable a conventional diesel engine to operate with a share of gaseous fuel while retaining the capability to run in full diesel mode. Dual-fuel (DF) engines allow the use of natural gas, or biomethane from renewable sources, as the main fuel, with advantages over CO<sub>2</sub>, SO<sub>x</sub> and PM emissions with the same levels of NOx.</div><div class="htmlview paragraph">This paper presents an experimental study investigating the effects of the diesel injection strategy on performance and emissions of a dual-fuel, single-cylinder, large bore, 4-stroke engine for marine applications. The engine is equipped with an external supercharging system; NG is injected in the port, while a Common Rail system injects the diesel pilot. Measurements were performed at 1500 rpm speed and Brake Mean Effective Pressure (BMEP) of 8.4 bar: the full diesel engine point representative of commercial Electronic Control Unit (ECU) map is chosen as reference. Further investigations will be performed to estimate the influence of dual-fuel combustion on the loss linked to the external supercharging. The performance of an externally supercharged and a turbocharged engine may differ: when working with turbocharged engines, boost and exhaust backpressure simultaneously increase. In contrast, when reproducing external supercharging behavior, an increase in the exhaust backpressure could alter the internal exhaust gas recycling and energy balances.</div></div>
Reference21 articles.
1. Masson-Delmotte , V. ,
Zhai , P. ,
Pörtner , H.O. ,
Roberts , D.
et al.
Global Warming of 1.5° C: IPCC Special Report on Impacts of Global Warming of 1.5° C above Pre-industrial Levels in Context of Strengthening Response to Climate Change, Sustainable Development, and Efforts to Eradicate Poverty Cambridge University Press 2018 10.1017/9781009157940.005
2. Lamb , W.F. ,
Grubb , M. ,
Diluiso , F.
et al.
Countries with Sustained Greenhouse Gas Emissions Reductions: An Analysis of Trends and Progress by Sector Climate Policy 22 1 2022 1 17 10.1080/14693062.2021.1990831
3. Shukla , P.R. ,
Skea , J. ,
Slade , R. ,
Al Khourdajie , A.
et al.
Summary for Policymakers Climate Change 2022: Mitigation of Climate Change. Contribution of Working Group III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change Cambridge, UK and New York Cambridge University Press 2022 10.1017/9781009157926.001
4. Minx , J.C. ,
Lamb , W.F. ,
Andrew , R.M. ,
Canadell , J.G.
et al.
A Comprehensive and Synthetic Dataset for Global, Regional, and National Greenhouse Gas Emissions by Sector 1970–2018 with an Extension to 2019 Earth System Science Data 13 11 2021 5213 5252 10.5194/essd-13-5213-2021
5. Gan , Y. ,
Wang , M. ,
Lu , Z. , and
Kelly , J.
Taking into Account Greenhouse Gas Emissions of Electric Vehicles for Transportation De-Carbonization Energy Policy 155 2021 112353 10.1016/j.enpol.2021.112353