Wärtsilä Voyage Emissions Reduction system

The Wärtsilä Voyage Emissions Reduction (VER) system is a means for increasing oil tanker revenues, while also significantly aiding the environment through reduced emissions. The system effectively eliminates the problem of volatile organic compound (VOC) emissions from tankers during laden voyages.

VOC's are organic chemicals having a high vapour pressure resulting from their low boiling point, which leads to extensive evaporation. On average, an oil tanker will emit 0.085 percent of its contained cargo per each week. For a 320,000 DWT Very Large Crude Carrier (VLCC), this amounts to 270 tons of lost cargo per week.

The Wärtsilä VER system meets all the regulation 15 requirements of the International Maritime Organization's (IMO) MARPOL Annex VI protocol. It also fulfils port specific requirements for terminals with regards to VOC emission reductions.


    The Wärtsilä VER system is being made available in two versions. The 'reabsorption' version is a simple to install, 'plug-in' system that re-circulates the VOC back to the cargo tanks. It represents a relatively simple technology for eliminating cargo losses, which operates automatically and without manual intervention. The Wärtsilä system demands far less power to operate than available alternative systems. The 'fuel' version utilises the VOC as fuel for the vessel. This is a new, unique and patent pending innovation from Wärtsilä with obvious fuel cost saving advantages. Both versions promote environmental sustainability by reducing VOC emissions by some 75 percent.

    Key benefits
    • Easy installation
    • Suitable for retrofit
    • Automatic operation
    • Little maintenance required
    • Significant increase in the amount of delivered cargo
    • Payback time of less than 1 year
    • Environmentally friendly

    VOC emissions from cargo tanks contain both methane and nonmethane hydrocarbons. A reduction of 5400 tons of VOC per year translates to approximately 20,000 tons CO2- equivalents. Local pollution is reduced by 80%.

    Technical Specification
    VER 400 VER 900
    Power requirement 34 kW 48kW
    Compressor capacity 400 Sm3/h 800 Sm3/h
    Delivery pressure 2.5 barg 2.5 barg
    Weight 8.5 mT 9.5 mT
    Size (L x W x H) 3.05m x 2.44m x 2.59m 6.10m x 2.44m x 2.59m
    Vessel size max 160000 TDW max 320000 TDW

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