What would an Onboard Carbon Capture and Storage (OCCS) system look like on the Stena Impero?
The team considered the following factors, amongst others,
- Availability of onboard energy: In particular, how can we use waste heat to operate the OCCS system to reduce fuel penalty?
- Availability of onboard space: How do we accommodate the OCCS system and integrate it in the most space- and cost-efficient manner?
- Optimal size of the OCCS and storage tank for capture CO2
To aid design, the team conducted various vessel visits,
- At the project’s inception, GCMD and the project team visited the Stena Impero in Singapore to assess available onboard space for the OCCS system.
- A subsequent visit was then made to the sister vessel Stena Imperial in Immingham, UK, to gather information on existing free space and the positioning of major components. Based on this visit, a 3D model of the Stena Impero was developed with the main carbon capture components incorporated in the model.
- The second visit to the Stena Impero was at Drydocks World, Dubai, UAE where available onboard space was assessed again. That visit confirmed that it is technically feasible to integrate the carbon capture system onboard the Stena Impero.
These are some key design elements of the OCCS system:
- Mega-skid module: The carbon capture system was designed into a mega-skid module for easy onboard integration.
- Cost-effective: This mega-skid design is more cost-effective as it packages all the main OCCS system components together into one vertical module.
- Reduced size: The OCCS system features a unique constant exhaust flow rate design. This design allows for an overall smaller system, targeting engine loads that produce the most emissions.
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