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Quantification of In-Use Marine Engine Degradation

Description:

As a marine engine ages, components and seals degrade, reducing fuel efficiency and increasing emissions. These aging affects can be mitigated by routine maintenance and periodic major rebuilds included in maintenance schedules which are a component of a vessels safety management system. Because these major overhauls, rebuilds, or installing new power systems is common, the effects of degradation cannot be assumed based solely on vessel’s age.

To better understand the air quality and efficiency impacts on marine engine degradation, detailed historical assessments are needed but are not readily available, this project proposes an alternative approach to evaluating engine degradation based on developing partnerships with marine engine maintenance groups to test engines prior to and after maintenance activities.

Objective:

The objective of this project is to develop a cost-effective methodology to quantify the impact engine degradation has on fuel efficiency and emissions based comparison of engine testing prior to service activities and the manufacture’s performance specs at the time the engine was originally manufactured. Additionally it would be informative to evaluate emissions after servicing to quantify impacts and efficiency gains related to servicing.

Benefits:

From a research perspective, such information is essential for further quantifying the relationship between vessel aging, emissions discharges and fuel efficiency. In addition, a preliminary literature review suggest that previous studies have focused on small sample sizes. A large dataset comprised of 50 or more observations can be used to update and inform existing models. From a vessel operating perspective, findings from this project are expected to be ‘practice ready’ and could be used to evaluate change is operating efficiency and optimization of vessel maintenance schedules. From a policy perspective, maritime emissions standards have become increasingly rigorous and conducting research that supports industry compliance efforts is a good policy decision.

Related Research:

No related TRB research was identified for this topic.

Tasks:

This project is comprised of five activities: develop a cost-effective methodology to quantify the impact engine degradation has on fuel efficiency and emissions; implement testing prior to service; implement testing after service; compile the data, analyze results; and publish the findings and the full data set.

Phase 1 – Methodology

· Develop a cost-effective methodology to quantify the impact engine degradation has on fuel efficiency and emissions based on testing of engines prior to scheduled servicing. Results from these testing, events can be compared with manufactures original data regarding fuel consumption rates and emissions (where available).

· Testing should also be implemented after servicing to quantify the impact servicing has on fuel and emissions rates.

Phase 2 – Test planning/implementation

· Work with companies that rebuild marine engines to revise the methodology developed in Phase 1 to include their insights into the value of maintenance and major rebuilds.

· Implement testing utilizing the revised methodology for 50 or more marine engines. All sampled engines should be used to power vessels with dead weight tonnage greater than 20,000 tons

Phase 3 - Analysis

· Compile the data, analyze results.

Phase 5 – Dissemination

· Identify potential users and notify them of the availability of the draft report and data.

· Post the draft version of the findings and supporting data and solicit comments.

· Post final version that addresses comments received on the draft version and post the final report on the TRB website.

Relevance:

International Maritime Organization (IMO), federal agencies, non-governmental groups, maintenance providers, vessel trade groups, consultants, vessel owners and operators.

Sponsoring Committee:AW030, Marine Environment
Research Period:12 - 24 months
Research Priority:Medium
RNS Developer:Daniel Fitz-Patrick and Richard Billings
Source Info:International Maritime Organization (IMO), federal agencies, non-governmental groups, maintenance providers, vessel trade groups, consultants, vessel owners and operators.
Date Posted:11/01/2020
Date Modified:01/19/2021
Index Terms:Marine diesel engines, Degradation failures, Maintenance, Air quality, Engine efficiency,
Cosponsoring Committees: 
Subjects    
Marine Transportation
Maintenance and Preservation
Vehicles and Equipment
Energy
Environment

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