Solutions for greenhouse gas emissions reduction

Wärtsilä's actions to reduce greenhouse gas emissions
 Sustainability Solutions

Engine efficiency improvement
High efficiency is important in the control of climate change, and with low emissions our products meet the various environmental regulations. The efficiency of Wärtsilä diesel and gas engines ranges between 42-50%, depending on the engine type.

Gas and multifuel engines
The Wärtsilä dual-fuel (DF) engine is another innovation that has a significant effect on controlling climate change. Thanks to the technology developed by Wärtsilä, our customers can flexibly employ the same engine using various fuels. This also makes it possible to reduce the impact on the environment.

DF engines are used in power plants and for powering a wide range of different kind of vessels. This single solution means that the total CO2 emissions from all our current customers' LNG-carrier applications will be reduced by several millions of tons, when compared to traditional gas transportation. At the same time, the availability of gas will be improved and the environmental impacts of gas transportation will be reduced. For other applications an efficient way to reduce CO2 emissions are the use of biofuels. Wärtsilä engines adapted for biofuel are today in operation both in land based power plants and as main engines in marine applications.

Modernisations and conversion services
Wärtsilä applies new technologies also to its existing products, which makes it possible to further reduce their environmental impact. With the help of our service products, we can improve the efficiency of older engines and reduce their emissions to the same level as those of our newer products. Slow steaming packages for vessels are available to meet the new power demand originating from reduced service speeds. We also convert oil-fuelled engines for gas or biofuel use.

Waste heat recovery for ships
In addition to waste heat recovery systems Wärtsilä has also introduced a Boosting Energy Efficiency catalogue, which contains more than 50 different efficiency improvement actions for saving energy in ships. Please visit for a more complete view of the solutions introduced in this catalogue.

Environmentally advanced vessel solutions
The new Wärtsilä Gas Platform Supply Vessel (PSV) design represents a state-of-the-art vessel featuring outstanding energy efficiency, a unique hull form, fuel flexibility and outstanding vessel performance in areas such as fuel economy and cargo capacity. This is a unique configuration of the gas electric propulsion system based on a combination of the Low Loss Concept for Electric Propulsion and the wide range of DF engines. Wärtsilä's ability to offer total concept solutions that include the design of the vessel, the propulsion plant, electric & automation and a host of fuel saving and environmentally sustainable options has given the company a notable competitive edge - particularly in the area of speciality vessels such as Gas PSVs.

Innovative design solutions for flare gas utilisation Wärtsilä delivers innovative flare gas ignition and flare gas recovery systems for the oil and gas industry enabling flares to be completely put out saving the environment for emissions of greenhouse gases and other pollutants related to flaring.

Wärtsilä has developed an integrated solution for flare gas utilisation, based on our proven flare gas ignition and recovery systems and the new GasReformer. This solution transforms flare gas into a composition that enables its use for fuel gas in gas engines and feed gas to LNG plants.

With current installations, Wärtsilä's flare gas recovery solutions reduce the global CO2 emissions of about 1 million ton per annum which is equivalent to approximately 250,000 cars. As of today, the total reduction in the emissions of greenhouse gases from our flare gas recovery systems is about 5 million tons.

Innovative design solutions to enable reductions of atmospheric emissions of volatile organic compounds from offshore oil installations
Wärtsilä delivers systems that eliminate the release of hydrocarbon vapors to the atmosphere by an innovative solution replacing the tank vapor atmosphere with a recycled hydrocarbon atmosphere. While normally tank vapor atmosphere is a mixture of hydrocarbons and flue gases, removing flue gases enables recycling of the atmosphere and thus the tanks are venting to a closed system. With current installations, Wärtsilä's hydrocarbon blanketing solutions are annually eliminating a loss of 500,000 barrels of oil equivalents being released to the atmosphere.

Combined cycle
Many steam combined cycle diesel engine plants have been delivered during the recent years. Today, the focus is strongly on introducing high-efficiency gas engine combined cycle solutions, specifically intended for plant sizes of several hundred megawatts.

Combined heat and power
Combined heat and power plants (CHP) cover various types of recovery and utilisation of heat energy, in addition to electricity generation. The energy can be utilised as heat, such as hot water or steam, or as cooling by means of chillers. The most recent step is an exhaust gas driven chiller, which is believed to offer a cost-competitive CHP solution for various market areas.

Solution Power (MW) Fuel Annual CO2 reductions (t) Reference technology and fuel
Single cycle engine power plant 50 HFO 58 871 Boiler plant/Coal
Single cycle engine power plant 50 HFO 43 687 Gas turbine /LFO
Single cycle engine power plant 50 Gas 26 342 Single cycle gas turbine/Gas
CHP engine plant (total eff. 90%) 30 + 30 (Heat) Gas 83 552 Boiler plant/Coal (EI.) + Boiler plant/LFO (Heat)
DF engines in LNG carriers 40 Gas 41 000 Steam boiler
LNG cruise ship 68 Gas 43 000 Cruise ship/HFO
Gas engine conversion 50 Gas 57 200 Diesel engine/HFO

As the industry forerunner, Wärtsilä has a responsibility to develop and supply advanced solutions that enable the environmental impact of its customers to be reduced. This is Wärtsilä’s main role in the combat against climate change.

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