Hamworthy’s regas module at Sinopacific, image courtesy Hamworthy
Hamworthy Oil & Gas Systems has secured a contract to supply its innovative LNG regasification technology for the third Hoegh LNG Floating Storage and Regasification Unit (FSRU) under construction at Hyundai Heavy Industries.
In this system, LNG is heated by propane in a closed loop and the propane is heated by seawater. In situations where the seawater is too cold to supply all the required heating energy, additional heat can be introduced.
The cascade concept is recommended instead of directly heat exchanging with seawater. LNG heat exchanged directly with seawater increases the risk of freezing the seawater in the heat exchanger. Propane as a secondary medium is suggested because of its thermodynamic properties with a low freezing point.
A HAZID analysis has been carried out with DNV to identify risks related to the design and operation of the regasification system. For example, it was concluded that the cascade system is a safer system than the pure seawater based. LNG enters a cryogenic pump capable of producing the required send-out pressure (e.g. up to 130 bar has been studied). LNG at the required discharge pressure is heated in two stages.
In the first stage LNG is heated from -160°C to -10°C in a compact printed circuit heat exchanger with propane as a heating medium.
In the second stage, LNG can be heated further using seawater as a heating medium in a shell and tube heat
exchanger.
In the LNG/Propane heat exchanger, heat is exchanged against propane circulating in a closed loop. The propane enters the heat exchanger at approx. 0°C at 4.7 bar as gas. In the heat exchanging process propane is condensed, and leaves the exchanger in a liquid state at approximately -5°C. The propane in the closed loop is then pumped by the circulating pump and heated against seawater in titanium semi welded plate heat exchangers. In these heat exchangers, the propane is evaporated and heated to 0°C before returning as gas to the printed circuit heat exchanger.
Working together with Sinopacific Offshore and Engineering (SOE), Wartsila Hamworthy will design and supply the system concept whilst the key equipment and fabrication will be supplied by SOE.
This partnership agreement follows on from the contract to supply a propane-seawater regasification system for the first two 170,000m3 capacity vessels signed in November last year.
Rendering courtesy Hoegh LNG
The floating regasification market is experiencing significant uptake and Höegh have projected annual growth in the LNG market of 6-7% over the coming few years.
Sveinung Støhle, Hoegh LNG’s President and Chief Executive, was quoted as saying: “Our strategy to expand in the floating regasification market worldwide remains firm and we believe in strong continued growth in this segment.”
Reidar Strande, LNG Business Unit Director, Hamworthy Oil and Gas Systems said: “This contract for Hoegh LNG follows on from the joint project with SOE in supplying our regasification module for the converted Golar Khannur. The module concept was a fast-track project allowing the regasification system to be almost complete before lifting onboard the vessel, with very few interfaces. Delivery of this equipment took place in November 2011.”
By Ellen Francis (Reuters) – Interpol has issued red notices for the captain and owner of the ship that carried the chemicals which devastated Beirut in an explosion in August, killing 200...
By Chen Aizhu (Reuters) – China has issued 5 million tonnes of clean marine fuel export quotas in the first release for 2021, to five companies including a private refiner,...
By Andrea Shalal (Reuters) – The United States is urging European allies and private companies to halt work that could help build the Nord Stream 2 natural gas pipeline and...
December 23, 2020
Total Views: 850
Sign Up Now for gCaptain Daily
Just enter your email and get hot news every morning
We use cookies on our website to give you the most relevant experience. By clicking “Accept”, you consent to the use of ALL the cookies.
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.