Analysing ship emissions under complex operating conditions: Insights from onboard measurement data

Ailong Fan; Bin Li; Junhui Yan; Liu Yang; Yaqing Shu; Yuqi Xiong; Mingyang Zhang

doi:10.1016/j.marpolbul.2024.117280

Analysing ship emissions under complex operating conditions: Insights from onboard measurement data

Mar Pollut Bull. 2024 Nov 19;209(Pt B):117280. doi: 10.1016/j.marpolbul.2024.117280. Online ahead of print.

Authors

Ailong Fan¹, Bin Li², Junhui Yan³, Liu Yang⁴, Yaqing Shu⁵, Yuqi Xiong⁶, Mingyang Zhang⁷

Affiliations

¹ State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan, China; School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan, China; East Lake Laboratory, Wuhan, China.
² School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan, China.
³ State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan, China.
⁴ State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan, China; School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan, China. Electronic address: yang.liu@whut.edu.cn.
⁵ State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan, China. Electronic address: y.shu@whut.edu.cn.
⁶ Department of Environmental Science and Engineering, Fudan University, Shanghai, China.
⁷ Department of Mechanical Engineering, Aalto University, Espoo 20110, Finland.

PMID: 39566137
DOI: 10.1016/j.marpolbul.2024.117280

Abstract

This research evaluated the emission characteristics of old ships during typical operations, under varying cruising speeds, and during lock transit, using a shaft power meter and PEMS. The research revealed that upstream and downstream low-load voyages accounted for 67.9 % and 65.4 % of the total voyage, respectively. The average emission factors of CO, NO_X and CO₂ were highest under lock transit with 17.13±0.51 g/kWh, 16.2±0.62 g/kWh and 1075.37±5.72 g/kWh, respectively, while SO₂ was highest under manoeuvring with 0.46 ± 0.001 g/kWh. Emissions are closely correlated with engine speed, with the largest emissions at cruising, and emissions at departure and docking significantly concentrated in the 10-15 % and 5-10 % loads. This research emphasizes the importance of considering low-load operating conditions in engine test cycles and provides data support for maritime decarbonization and emission reduction strategies. Future research should continue to explore the emission characteristics of old ships.

Keywords: Emission factors; Low-load; Navigation conditions; Ship emissions; Test system.