KR-102960267-B1 - FUEL GAS SUPPLY SYSTEM AND METHOD FOR SHIP

Abstract

A fuel gas supply system for a ship is disclosed. A fuel gas supply system for a ship according to an embodiment of the present invention may include: a fuel storage tank in which liquefied fuel containing hydrogen is stored; a hydrogen supply unit that supplies hydrogen from the fuel storage tank to a consumption point that uses hydrogen as fuel; a liquefied gas storage tank in which liquefied gas is stored; and an evaporative gas control unit that controls the amount of evaporative gas generated in the liquefied gas storage tank using the cold energy of the hydrogen supply unit.

Inventors

• 하대승

Assignees

• 삼성중공업 주식회사

Dates

Publication Date

20260507

Application Date

20210527

Claims (9)

1. Fuel storage tank in which hydrogen-containing fuel is stored in liquid form; A hydrogen supply unit that supplies the fuel from the above fuel storage tank to a consumption site that uses the hydrogen as fuel; A liquefied gas storage tank in which liquefied gas is stored; and It includes an evaporative gas control unit that controls the amount of evaporative gas generated in the liquefied gas storage tank using the cold energy of the hydrogen supply unit; The above hydrogen supply unit A first fuel supply line that vaporizes the fuel stored in the fuel storage tank and supplies it to the consumption location; A second fuel supply line that compresses fuel vapor generated in the above fuel storage tank and supplies it to the above consumption site; and It includes a vaporizer that vaporizes the fuel passing through the first fuel supply line, and The above evaporative gas control unit A heat exchanger installed on the above-mentioned first fuel supply line; A liquefied gas supply line that supplies liquefied gas stored in the liquefied gas storage tank to the heat exchanger to exchange heat with the fuel passing through the first fuel supply line in the heat exchanger; A liquefied gas return line for returning the liquefied gas cooled through heat exchange in the above heat exchanger to the above liquefied gas storage tank; and It includes a spray nozzle installed inside the above-mentioned liquefied gas storage tank and connected to the above-mentioned liquefied gas return line to spray the above-mentioned liquefied gas, and The above second fuel supply line is connected to the above first fuel supply line so that fuel vapor passes through the above vaporizer, and The above fuel cell unit A fuel gas supply system for a ship comprising an air supply system, an oxygen supply unit having a pure oxygen capture unit that captures pure oxygen from air supplied from the air supply system and a pure oxygen storage tank that stores the pure oxygen captured from the pure oxygen capture unit, and a fuel cell that receives pure oxygen from the oxygen supply unit.
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6. In Article 1, The above vaporizer A fuel gas supply system for a ship provided between the heat exchanger and the consumption site, which vaporizes the fuel using glycol water as the main heat source.
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8. In Article 1, The above hydrogen supply unit A fuel gas supply system for a ship further comprising a return supply line that branches off between the point where the vaporizer and the second fuel supply line are connected and can return the fuel and the fuel vapor to the fuel storage tank.
9. In Article 1, The above consumption site is A fuel gas supply system for a ship that further includes an engine section.

Description

Fuel gas supply system for ships and method thereof The present invention relates to a fuel gas supply system for a ship and a method thereof. Recently, the consumption of natural gas has been rapidly increasing worldwide. Gas wells or oil wells where natural gas is produced are typically located far from demand centers. Therefore, natural gas is transported in gaseous form via onshore or offshore pipelines, or transported to distant demand centers stored in liquefied natural gas (LNG) carriers. In this process, liquefied natural gas is obtained by cooling natural gas to cryogenic temperatures (approximately -163°C); since its volume is reduced to about 1/600th of that of natural gas in its gaseous state, it is highly suitable for long-distance transportation by sea. Meanwhile, offshore structures for LNG production, such as LNG FPSO (Floating Production Storage and Offloading vessel) and LNG FSRU (Floating Storage and Regasification Unit), are manufactured in the shape of a ship to minimize fluid resistance, and then float and anchor at sea to produce and store LNG. The above LNG FPSO (Liquefied Natural Gas-Floating Production Storage Offloading) is a large special vessel equipped with the functions of producing and storing liquefied natural gas (LNG) at sea and unloading it to an LNG carrier. It is a floating offshore structure used to refine extracted natural gas at sea, liquefy it directly by a liquefaction plant for storage, and transfer the stored LNG to an LNG carrier when necessary. In addition, an LNG FSRU is a floating offshore structure that allows for the omission of onshore LNG storage and vaporization facilities by storing LNG unloaded from an LNG carrier at sea far from land in a cargo tank, and then vaporizing the LNG as needed to supply it to onshore demand centers (seawater desalination plants, power plants, factories, etc.). Meanwhile, LNG produced from offshore structures such as FPSOs is transported by carriers to onshore LNG storage and vaporization facilities or offshore facilities such as LNG-FSRUs. LNG carriers and LNG RVs are provided for transporting LNG. The LNG carrier carries LNG, sails at sea, and unloads the LNG at an onshore destination, and the LNG RV carries LNG, sails at sea, arrives at an onshore destination, and then regasifies the stored LNG to unload it in the form of natural gas. Meanwhile, LNG produced from LNG production facilities or oil is used as the primary fuel for power generation and propulsion of these LNG production facilities and transport equipment (LNG FPSO, LNG FSRU, LNG carrier, LNG RV, etc.). In particular, the vast majority of transport facilities still rely on oil as their primary power source. Consequently, this has led to problems such as air pollution caused by harmful gases emitted from generators and engines, and marine pollution resulting from oil leakage. Furthermore, in the case of LNG carriers, transporting LNG from offshore structures requires the cumbersome task of stopping at ports to refuel with oil, which serves as the carrier's fuel. Since selecting LNG as the primary power source entails the necessity of separate, costly liquefaction and vaporization facilities, its application is extremely rare. Therefore, there is a demand for alternative power sources to replace oil or LNG, which are the power sources for LNG production facilities and LNG carriers, and there is an urgent need to develop vessels that are environmentally friendly and capable of high-efficiency propulsion. FIG. 1 is a configuration diagram of a fuel gas supply system for a ship according to one embodiment of the present invention. Figure 2 is a configuration diagram of a ship to which the fuel gas supply system of the ship shown in Figure 1 is applied. Figure 3 is a diagram illustrating the fuel cell section. Figure 4 is a drawing for explaining the engine section. Other advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is defined only by the scope of the claims. Even if not defined, all terms used herein (including technical or scientific terms) have the same meaning as generally accepted by the general art in the prior art to which this invention belongs. General descriptions of known configurations may be omitted to avoid obscuring the essence of the present invention. In the drawings of the present invention, identical or corresponding configurations are given the same reference numerals whenever possible. To aid in understanding the present invention, some configurations in the drawings may be depicted in a somewhat exaggerated or reduced manner. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the p