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Home > Construction progress > FSRU conversion

FSRU conversion



Following the activation of the contract for the purchase of an FSRU vessel contracted with Golar, which was activated after the Final Investment Decision adoption, in accordance with the contractual obligations, activities were initiated to develop a detailed engineering design of the FSRU vessel, as well as to procure/manufacture key equipment to be installed during conversion.

Golar offered a new conversion of the existing LNG carrier to an FSRU which value is EUR 159,6 million. It is an LNG carrier, which was built in 2005 and which sails under the name "Golar Viking". At the time of delivery, the vessel will be delivered to the LNG terminal location from the shipyard as a new FSRU conversion in accordance with the highest technical and environmental protection standards, as required by tender documentation.

The selected FSRU vessel has LNG storage capacity of 140,206 m3, with a nominal LNG regasification capacity of 300,000 m3 of natural gas per hour, giving a yearly capacity of 2,6 billion m3 of gas, which is in accordance with the technical capacity of the gas transmission system of the Republic of Croatia.

Offered technical solution for LNG regasification (conversion of natural gas from liquid to gaseous state) will work in the open loop system in such a way that during the intake and discharge of sea water the FSRU will not use electro-chlorination (separation of chlorine from the sea) for the purpose of preventing marine growth in the system, since it will work on the principle of mechanical cleaning of the entire system as part of regular annual maintenance of the FSRU. Although the use of electro-chlorination without the negative environmental impacts of such systems is used in accordance with technical standards, LNG Croatia, with the aim of taking into account the local community's position on non-acceptance of the use of chlorine during the LNG regasification process, has given additional points to solutions for systems which enable mechanical cleaning of the system from marine growth which occurs during the sea water flow.

The LNG terminal, with the selected FSRU vessel, will be able to accept all LNG carriers, with a capacity from 3,500 m3 to 265,000 m3, which represents the total worldwide fleet of LNG carriers carrying LNG. According to the International Gas Union LNG Report for 2018, out of a total of 413 vessels in the global LNG carrier fleet, 327 are up to 170,000 m3 of which 124 are up to 140,000 m3. Cargo is transferred from the LNG carrier to the LNG terminal in quantities of at least 8,000 m3 of LNG/hour. Pursuant to Article 49 (1) of the Rules of operation of liquefied natural gas terminal (Official Gazette 60/18), the permitted standstill for a standard cargo volume is 30 consecutive hours, and in the case where the LNG to be transferred is not a standard cargo quantity, the LNG terminal operator and the LNG terminal user agree to a longer or shorter permitted standby time, depending on the cargo quantity. During the transfer of the cargo, regasification is carried out all the time, so the transferred LNG is immediately regasified and sent to the gas transmission network.

The detailed design of the FSRU vessel is being performed by Wärtsilä and the FSRU vessel's General Arrangement Plan was completed in early August 2019, which is in line with the equipment schedule provided by the EPC Contractor.

The production and testing of the main equipment of the FSRU vessel (regasification units, heat exchangers, high pressure booster pumps of the regasification units, engine room, dual-fuel engines for producing power, LNG feed pumps and similar) is in progress. The equipment is currently manufactured worldwide due to the specificity of factories producing such equipment (Germany, USA, Singapore, Italy, France, Netherlands, United Kingdom, South Korea and China).

All equipment installed during the conversion of the LNG carrier to the FSRU will be manufactured, tested and accepted in early 2020 and delivered to the Hudong shipyard. At the time of delivery to the shipyard, the conversion of the LNG carrier into an FSRU vessel takes about 6 months. During the conversion, the independent classification society DNV GL will inspect the installation of each individual system, installation and equipment. Upon completion of the conversion, a final inspection of the FSRU vessel will be performed by an independent classification society, after which the FSRU vessel will head to the location of the LNG terminal on the Island of Krk.

The delivery of the FSRU vessel, i.e. the arrival of the FSRU vessel to the location of the LNG terminal on the Island of Krk, is planned during October 2020.