Multiple Duct System for Vessel Exhaust Segmentation
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Solution Overview
Problem
Existing emissions control systems for oceangoing vessels face inefficiencies and regulatory challenges due to the combination of exhaust streams from engines and boilers, leading to inaccurate emissions monitoring, inefficiencies in emissions reduction, and inability to effectively regulate or verify emissions reductions from indeterminate sources.
Innovation Solution
A multiple duct system with independent control of backpressure for each duct, allowing separate treatment and monitoring of exhaust streams from engines and boilers, enabling precise emissions reduction and verification, and improving operational safety by avoiding the need for a large, hazardous single duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If exhaust streams from engines and boilers are combined in a single duct, then the system structure is simplified, but backpressure differences cause inefficiencies and potential boiler failure
Solution Approach 1:
The exhaust capture system is divided into multiple separate ducts, with each duct dedicated to capturing exhaust from a specific emissions source (engine or boiler). This segmentation prevents backpressure issues by maintaining independent exhaust pathways, while still achieving comprehensive emissions capture across multiple sources.
2Device complexity
If exhaust streams from engines and boilers are combined, then the number of ducts is reduced, but emissions monitoring and regulation become inaccurate
Solution Approach 1:
Separate ducts are maintained for engines and boilers to preserve distinct exhaust streams, enabling accurate monitoring and measurement of emissions from each source type. This segmentation allows regulators to verify emissions reductions for each emissions source independently.
Solution Approach 2:
The system incorporates monitoring capabilities that provide feedback on exhaust flow rates and emissions characteristics for each separate duct. This enables real-time verification of emissions reductions and allows for dynamic adjustment of treatment system operation based on actual measured conditions.
3Device complexity
If a single large duct is used to convey combined exhaust flow, then the system is simpler, but safety hazards increase due to large duct size
Solution Approach 1:
The exhaust conveyance system is segmented into multiple smaller ducts rather than one large duct. This reduces safety hazards associated with large duct sizes while maintaining the capability to capture and treat exhaust from multiple emissions sources. Each smaller duct presents reduced risk if failure occurs.
4Measurement precision
If multiple separate ducts are used for each emissions source, then emissions monitoring accuracy is improved, but system complexity increases
Solution Approach 1:
The treatment system is designed as a universal platform that can handle multiple separate exhaust streams simultaneously. Rather than requiring separate treatment systems for each duct, a single multi-functional treatment system processes exhaust from all sources, reducing overall complexity while maintaining monitoring precision.
Data Source
AI summary
A multi-circuit system for temporarily connecting to a plurality of exhaust pipes of an oceangoing vessel at berth or at anchor and treating captured exhaust gas. Each circuit includes an exhaust gas processing system, a duct system to reach from the processing system to an exhaust pipe; a duct inlet port for attachment to a connector receiving exhaust gas from an exhaust pipe. A positioning system supports the duct systems and connectors in a ganged relationship and positions the duct systems and connectors in a temporary operational position and in a non-operational position. In another embodiment, blower controller is responsive to a pressure measurement at the duct inlet port or the connector to control a blower speed to set or maintain the pressure to a desired pressure.