NICOP - Low Load Diesel Pilot Program
Abstract
The proposal will investigate and optimise low load operating thresholds in modern multicylinder diesel generators. Operating thresholds will be established via controlled operation of a remote power system integrated diesel generator. Optimisation of the units low load capabilities will subsequently be explored via modification to the engine, possibly including cooling, injector, cylinder, exhaust and/or charge air cooling sub-system refinement. This work is motivated by a need to explore low load capabilities of modern diesel engines, primarily concerned with integrating maximum renewable penetration into any remote power system. Diesels accounts for the vast majority of new and existing generation into off-grid and remote power systems, yet renewables offer cost competitive supply alternatives (Frischknecht, 2014). A key roadblock to greater renewable penetration remains the performance of the diesel engines and their inability to run at low loads. The lower you can run your diesel, the more renewable penetration can be achieved. Just how to achieve sustained low load operation, while maintaining power quality is the problem addressed within this proposal. Empirically it is known that low load operation (below 40% of their maximum rated load) results in poor combustion efficiency, contributing to internal cylinder glazing and fuel bypass of the piston sealing ring. In response engine suppliers have been reluctant to warrant engine operation below notional low load thresholds. With increasing renewable energy penetration, and thus spillage, from diesel hybrid energy systems, owners are increasingly seeking solutions to lower such low load capabilities. Our objectives are firstly to understand low load operational thresholds, secondly to optimize low load diesel generator performance, and thirdly to demonstrate sustained long term operation at low load, validating our stage two research recommendations. This research will provide a pathway to low load state operation for both legacy and new diesel engines, leading to the development of new low load specific technology refinement. Low load diesel technology will allow for reduce diesel reliance and reduced cost of energy for remote area power consumers.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N629091512006
Entities
People
- Michael Negnevitsky
Organizations
- Office of Naval Research
- United States Navy
- University of Tasmania