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Small and medium gas carriers generally transport liquid natural gas (LNG) or liquid petroleum gas (LPG), or other chemical products in gaseous form. Some vessel designs may be tailored for bunkering or ship-to-ship operations. Vessels in this size class need to be adaptable for varying voyage distances, loading conditions, and sailing speeds as well as varying power requirements for cargo handling and port entry and exit operations. Vessel CAPEX and OPEX are crucial to secure profitable and competitive business.
Gas carriers sail under variable cargo loads and with varying operational profiles, meaning propulsive and electrical power requirements can vary greatly. As a result, owners must balance the need to minimise a vessel’s Energy Efficiency Design Index (EEDI) with the need to ensure that installed propulsive power is sufficient to cope with adverse weather conditions as required by the IMO’s MARPOL Convention.
Vessels carrying hazardous or pollutant goods are usually required to have backup steering and navigational systems in case of failure. Small and medium gas carriers also often sail in challenging waters such as channels or fjords, making a reliable propulsion system, effective steering capability and excellent manoeuvrability a must. They may also be sailing in environmentally sensitive areas with strict emission and underwater noise limits. In addition, port operations may take place close to urban areas where even stricter local environmental regulations apply.
Hover or click on the symbols to reveal more information on the six parts of the integrated solution.
Small gas carrier DF-DE
Emission reduction and operational flexibility are the main drivers behind the development of Wärtsilä propulsion systems for small and medium gas carriers. These highly adaptable, customised propulsion systems can be enhanced with a variety of advanced functionalities according to the intended operational profile of the vessel in question.
A great option for this vessel type is a diesel-electric hybrid propulsion system that includes fuel-flexible medium-speed gensets, a switchboard and a propulsion motor connected to steerable aft thrusters, a forward tunnel thruster and a battery-based energy storage system (ESS). An integrated Energy Management System (EMS) ensures all the elements work seamlessly together, optimising energy flows to achieve the best performance in all operational modes.
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Small gas carrier DF-DM
Emission reduction and operational flexibility are the main drivers behind the development of Wärtsilä propulsion systems for small and medium gas carriers. These highly adaptable, customised propulsion systems can be enhanced with a variety of advanced functionalities according to the intended operational profile of the vessel in question.
A great option for this vessel type is a hybrid propulsion system that includes a fuel-flexible medium-speed main engine, a geared propeller system, a shaft motor/generator (PTO/PTI) and a battery-based energy storage system (ESS) as well as an auxiliary genset. An integrated Energy Management System (EMS) ensures all the elements work seamlessly together, optimising energy flows to achieve the best performance in all operational modes.
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Medium gas carrier
The Wärtsilä propulsion system for this vessel type has a main engine mechanically connected to a CPP through a one-step gearbox with PTO/PTI connection. This helps owners to balance the need to minimise a vessel’s Energy Efficiency Design Index (EEDI) and comply with the IMO’s MARPOL Convention while ensuring that installed propulsive power is sufficient to cope with adverse weather conditions. The Wärtsilä ProTouch Propulsion Control System offers a user-friendly interface and advanced features such as EcoControl. A GATE RUDDER™ can be added for superior efficiency and manoeuvrability and a bow thruster to further enhance manoeuvrability.
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Technology group Wärtsilä will supply the cargo handling and LPG (liquefied petroleum gas) fuel supply systems for a new Medium Gas Carrier (MGC) vessel being built for Turkish ship owner Pasco Gas. The contract was signed with Hyundai Mipo Dockyard (HMD) and was booked by Wärtsilä in Q4 2023.
The 45,000 m3 capacity vessel was ordered as an option following an earlier newbuild contract signed in February 2023. The Wärtsilä scope of supply is the same for both ships. HMD is a key customer of Wärtsilä, and the two companies have cooperated on several newbuild projects.
Wärtsilä has a market leading position in cargo handling solutions for gas carriers. The company continues to develop innovative solutions that enhance the safety, reliability, and efficiency of gas cargo handling.
“We are pleased to add this vessel for Pasco Gas to our impressive list of references and to extend our close and long relationship with HMD” commented Hans Jakob Buvarp, Sales Manager, Cargo Handling Systems, Wärtsilä Gas Solutions.
The Wärtsilä equipment is scheduled for delivery to the yard commencing in July 2025.
Wärtsilä Gas Solutions is a market leader with innovative systems and lifecycle solutions for the gas value chain. Our main focus areas are the handling of gas in seaborne transport (storage, fuel, transfer and BOG management), gas to power, liquefaction and biogas solutions. We help our customers on their journey towards a sustainable future through a focus on lifecycle performance, innovation and digitalisation.
Media contact for more information on this release:
Elin Saure Hasund
Sales & Marketing Coordinator, Gas Solutions
Wärtsilä Marine Systems
Tel: +47 91721144
elin.saurehasund@wartsila.com
Image caption: Wärtsilä gas handling systems once again selected for a medium gas carrier newbuild project. © PascoGas
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Wärtsilä Marine Systems in brief:
Wärtsilä Marine Systems supports customers with high quality products and lifecycle services related to the gas value chain, exhaust treatment, shaft line and underwater repair. We are committed to providing the latest and most efficient solutions, in line with Wärtsilä’s vision for a safe and sustainable future for our customers, our communities and our planet.
www.wartsila.com/marine
Wärtsilä in brief
Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. We emphasise innovation in sustainable technology and services to help our customers continuously improve their environmental and economic performance. Our dedicated and passionate team of 17,500 professionals in more than 240 locations in 79 countries shape the decarbonisation transformation of our industries across the globe. In 2022, Wärtsilä’s net sales totalled EUR 5.8 billion. Wärtsilä is listed on Nasdaq Helsinki.
www.wartsila.com