Gas Solutions

Wärtsilä Gas Solutions offers innovative and energy efficient systems and solutions related to a number of oil & gas segments. The scope includes eg. marine LNG and LPG cargo systems, fuel gas systems for marine vessels, onshore gas terminals, biogas systems, flare gas ignition, oil separation and tank control systems. The business unit has end-to-end responsibility from sales to commissioning of complete systems.

Gas Cargo Handling Systems

Fully Refrigerated Gas Carriers

Wärtsilä Gas Solutions has long been the preferred cargo handling system supplier for many of the leading owners of fully refrigerated gas carriers. When transported in these ships, the LPG is normally kept at its coldest temperature (atmospheric pressure) and the required equipment needs to be extremely reliable.

Fully Pressurized Gas Carriers

Most of the vessels in the Gas Carrier fleet are fully pressurized with cargo tank volumes typically in the range of 1 000 m3 to 13 000 m3. Wärtsilä offers modern and advanced solutions for such vessels.
Fully pressurized vessels carry LPG at ambient temperatures and with corresponding saturated gas pressures. The design pressure for fully pressurized Cargo tanks is typically 18 bar(g).
Wärtsilä has developed the new and alternative QiCool design concept, which utilizes the best aspects of both fully pressurized and semi-refrigerated designs. With this approach, the cargo tank design pressure is reduced and cargo chiller units are installed.

Systems for Ethylene/Multi Gas Carriers

Wärtsilä Gas Solutions has become the largest supplier of complete cargo handling systems for vessels in this segment, covering the whole range of sizes requested by the market today. These vessels are known for their flexibility and can trade multiple types of cargo, from gas to chemicals. Deliveries also include carriers with LNG capacity and dual-fuel propulsion.

Gas Cargo Handling Systems Site

LNG Solutions

BOG Reliquefaction

Wärtsilä is a leading designer, developer and supplier of energy efficient LNG Boil-Off Gas (BOG) reliquefaction plants.  These systems are designed to be efficient, reliable, safe, robust and flexible.

With 35 systems in operation and an additional 8 plants under construction, Wärtsilä has the highest number of BOG reliquefaction plants installed in the global LNG carrier fleet. Similar solutions could also be installed with onshore LNG terminals.

We work closely with our customers to develop technological solutions that meet their needs for increased fuel flexibility, energy efficiency, and environmental performance in today’s fast changing LNG market.

LNG Regasification

Our portfolio of LNG regasification technologies represents an industry benchmark in terms of energy efficiency, robustness, and operational flexibility.

Wärtsilä has delivered and commissioned numerous floating LNG regasification plants based on either closed loop regasification technology, using steam with water/glycol as the intermediate heating medium, or open loop regasification technology using sea water with propane as the intermediate heating medium. An open seawater solution using glycol as intermediate medium is also under development.

We have also delivered modularised regasification plants for jetty installations. These facilitate a much shorter construction time compared to conventional land based LNG regasification terminal projects.

LNG Solutions site

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.

Wärtsilä Voyage Emissions Reduction system Site

Useful Downloads

Cargo Handling Systems Brochure


LNG Sysystems Brochure


Voyage Emission Reduction System Brochure