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Implementation of Portable Emissions Measurement Systems (PEMS) for the Real-driving Emissions (RDE) Regulation in Europe
Published on: December 4, 2016
Comparative analysis between different methods for calculating on-board ship's emissions and energy consumption based
Juan Moreno-Gutiérrez1, Emilio Pájaro-Velázquez1, Yolanda Amado-Sánchez1
1University College of Marine, Nautical and Radio-Electronic Engineering, Energy Efficiency in Maritime Transport Research Group, University of Cadiz, Campus de Excelencia Internacional del Mar, Spain.
The Science of the Total Environment
|September 12, 2018
Summary
Accurate measurement of ship emissions is debated. This study compares four methods and proposes a new, realistic approach for better energy management and detecting abnormal fuel consumption across all ship types.
Area of Science:
- Maritime environmental science
- Marine engineering
- Energy management in shipping
Background:
- Current methods for measuring ship fuel consumption and emissions lack harmonized guidelines and legal requirements.
- There is an ongoing debate regarding the most effective approach for monitoring maritime emissions.
- Fuel and emissions monitoring are standard practices, but standardization is needed for accurate onboard fuel consumption data.
Purpose of the Study:
- To compare four existing methods (EPA, IMO, Jalkanen, MAN) for calculating ship energy consumption and emissions.
- To present a more realistic, case-study-based method for energy consumption and emissions calculation.
- To identify the most suitable method for obtaining data for improved energy management applicable to any ship type.
Main Methods:
- A comparative analysis of four established methods: EPA, IMO, Jalkanen, and MAN.
- Development and application of a novel, integrated bottom-up system approach for energy consumption and emissions calculation.
- Detailed methodology applied to Ro-Pax ships, covering cruising, Speed Reduction Zone (SRZ) operation, maneuvering, and berthing.
Main Results:
- Significant differences were observed between the four existing methods when applied to Ro-Pax ships.
- The proposed improved method provides a more comprehensive calculation of energy consumption and emissions across various operational phases.
- The study details the application of a complete methodology for energy and emissions calculation.
Conclusions:
- The proposed method serves as a foundational step for implementing operational measures to detect abnormal fuel consumption and emissions.
- Uniform operational measures for onboard energy management and accurate fleet performance monitoring can be established.
- While not directly reducing fuel use, the method enables accurate monitoring essential for efficiency improvements.
