Babcock International Group has been granted a patent for a method to cool boil-off gas (BOG) from liquefied gas tanks. The method involves a heat exchanger that utilizes a first refrigerant, facilitating heat exchange and mixing with an oil-containing refrigerant to optimize cooling efficiency. GlobalData’s report on Babcock International Group gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Babcock International Group, was a key innovation area identified from patents. Babcock International Group's grant share as of June 2024 was 50%. Grant share is based on the ratio of number of grants to total number of patents.
Cooling method for boil-off gas from liquefied gas tank
The patent US12044468B2 outlines a method and apparatus for cooling a boil-off gas (BOG) stream from a liquefied gas tank, specifically targeting applications involving liquefied natural gas (LNG) in floating vessels. The method involves a series of heat exchange steps utilizing a heat exchanger with multiple zones. Initially, a first refrigerant is introduced into the heat exchanger, where it exchanges heat with the BOG stream, resulting in a warmer refrigerant stream. This stream is then recirculated through the heat exchanger, where it undergoes further cooling and separation processes to produce both oil-containing and oil-free refrigerant streams. The oil-free stream is condensed and expanded to serve as the first refrigerant, while the oil-containing stream is also expanded and introduced back into the heat exchanger for further heat exchange.
The apparatus described in the patent includes a heat exchanger designed to facilitate this cooling process, featuring multiple entry and exit ports for the refrigerant streams. It incorporates a single mixed refrigerant (SMR) recirculating system that utilizes an oil-injected screw compressor for compressing the SMR, followed by separation and cooling steps. The design allows for efficient heat exchange between the BOG stream and the refrigerants, ensuring that the temperature in the heat exchanger is managed effectively to prevent freezing of the oil in the refrigerant. The patent also specifies configurations for the heat exchanger, including options for vertical or near-vertical designs, and highlights the importance of maintaining specific temperature conditions within the different zones of the heat exchanger to optimize performance.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
