KR-20260064783-A - FUEL SUPPLY SYSTEM

KR20260064783AKR 20260064783 AKR20260064783 AKR 20260064783AKR-20260064783-A

Abstract

The present invention relates to a fuel supply system comprising a first fuel tank for storing a first fuel to be used in an engine, a first fuel supply line connected to the first fuel tank, a first low-pressure pump installed on the first fuel tank or the first fuel supply line, a second fuel tank for storing a second fuel to be used in an engine, a second fuel supply line connected to the second fuel tank, a second low-pressure pump installed on the second fuel tank or the second fuel supply line, an integrated fuel supply line connecting the first fuel supply line and the second fuel supply line to the engine, and a high-pressure pump installed on the integrated fuel supply line, and configured to supply fuel at different pressures depending on the type of fuel supplied to the engine.

Inventors

이균
이주희
이재문
김종훈
류승표

Assignees

한화엔진 주식회사

Dates

Publication Date: 20260508
Application Date: 20241029

Claims (18)

A first fuel tank for storing first fuel to be used in an engine; A first fuel supply line connected to the first fuel tank; A first low-pressure pump installed on the first fuel tank or the first fuel supply line; A second fuel tank for storing second fuel to be used in the engine; A second fuel supply line connected to the second fuel tank; A second low-pressure pump installed on the second fuel tank or the second fuel supply line; An integrated fuel supply line connecting the first fuel supply line and the second fuel supply line to the engine; and High-pressure pump installed on the above integrated fuel supply line Includes, A fuel supply system configured to supply fuel at different pressures depending on the type of fuel supplied to the engine.
In paragraph 1, A first flow detection device installed on the first fuel supply line; and A second flow detection device installed on the second fuel supply line. Includes more, A fuel supply system characterized by detecting the type of fuel supplied to the engine based on whether the first flow detection device and the second flow detection device detect it.
In paragraph 1, A first fuel supply valve installed on the first fuel supply line; and A second fuel supply valve installed on the second fuel supply line above. Includes more, A fuel supply system characterized by detecting the type of fuel supplied to the engine based on the open/closed state of the first fuel supply valve and the second fuel supply valve.
In paragraph 1, Multiple high-pressure pumps are arranged in parallel, and A fuel supply system characterized by controlling the pressure of fuel supplied to an engine by varying the number of high-pressure pumps operated according to the type of fuel supplied to the engine.
In paragraph 4, The first fuel mentioned above is ammonia ( NH₃ ), and The second fuel mentioned above is liquefied petroleum gas (LPG), and A fuel supply system characterized by operating a relatively smaller number of high-pressure pumps when supplying the second fuel compared to when supplying the first fuel.
In paragraph 1, A mixing chamber installed on the integrated fuel supply line in front of the high-pressure pump; A first recovery line branched from the integrated fuel supply line behind the high-pressure pump and connected to the mixing chamber; and A pressure regulating valve installed in the first recovery line to regulate the pressure of fuel supplied from the high-pressure pump to the engine. A fuel supply system characterized by further including
In paragraph 6, A fuel supply system characterized by the above-mentioned pressure regulating valve controlling the fuel supply pressure differently depending on the type of fuel supplied to the engine.
In Paragraph 7, The first fuel mentioned above is ammonia ( NH₃ ), and The second fuel mentioned above is liquefied petroleum gas (LPG), and A fuel supply system characterized by the pressure regulating valve supplying the first fuel to the engine at a relatively higher pressure than when supplying the second fuel to the engine.
In paragraph 6, A water level sensor that detects the water level of the mixing chamber above. Includes more, A fuel supply system characterized by controlling the discharge flow rate of the first low-pressure pump or the second low-pressure pump according to the water level detected by the water level sensor.
In paragraph 1, A first low-pressure safety valve installed between the first low-pressure pump and the high-pressure pump; A second low-pressure safety valve installed between the second low-pressure pump and the high-pressure pump; and High-pressure safety valve installed on the integrated fuel supply line between the high-pressure pump and the engine A fuel supply system characterized by further including
In Paragraph 10, A fuel supply system characterized in that the pressure at which the first low-pressure safety valve operates is set higher than the pressure at which the second low-pressure safety valve operates.
In Paragraph 10, A fuel supply system characterized by the above-described high-pressure safety valve being configured to operate when the pressure exceeds a first safety pressure when the first fuel is supplied to the engine, and to operate when the pressure exceeds a second safety pressure lower than the first safety pressure when the second fuel is supplied to the engine.
In paragraph 6, A fuel valve train (FVT) installed on the integrated fuel supply line between the high-pressure pump and the engine to regulate the supply of fuel to the engine A fuel supply system characterized by further including
In Paragraph 13, A heat exchanger installed on the integrated fuel supply line between the high-pressure pump and the fuel valve train to regulate the temperature of the fuel supplied to the engine A fuel supply system including more.
In Paragraph 13, Fuel filter installed on the integrated fuel supply line between the high-pressure pump and the fuel valve train A fuel supply system that further includes
In Paragraph 13, A second recovery line connecting the fuel valve train and the mixing chamber to recover unused fuel from the engine into the mixing chamber. A fuel supply system characterized by further including
In Paragraph 16, The fuel valve train, the second recovery line, and a purge gas supply device for supplying purge gas to remove fuel remaining in the engine; and A purge line through which the purge gas supplied by the above purge gas supply device is discharged together with residual fuel. A fuel supply system characterized by further including
In Paragraph 17, gas-liquid separator connected to the above purge line Includes more, The gas separated in the above gas-liquid separator is discharged to a safe area, and A fuel supply system characterized in that the liquid separated in the above-mentioned gas-liquid separator moves to an ammonia capture device.

Description

Fuel Supply System The present invention relates to a fuel supply system for supplying fuel to an engine that uses ammonia or liquefied petroleum gas (LPG) as fuel. As global warming intensifies, efforts to reduce greenhouse gas emissions are being made worldwide. With the 1997 Kyoto Protocol, which contained greenhouse gas reduction obligations for developed countries, set to expire in 2020, the 195 parties participating in the Paris Climate Change Accord—which was adopted at the 21st United Nations Framework Convention on Climate Change held in Paris, France in December 2015 and entered into force in November 2016—are making various efforts to reduce greenhouse gases. Along with these global trends, interest in renewable energy sources such as wind, solar photovoltaic, solar thermal, bioenergy, tidal, and geothermal power is growing as pollution-free energy alternatives to fossil fuels and nuclear power, leading to the development of various technologies. Meanwhile, recently, engines using ammonia as an eco-friendly fuel capable of reducing carbon dioxide emissions during ship operation have been gaining attention. Furthermore, ammonia-fueled engines are not limited to using ammonia exclusively; they can also switch to liquefied petroleum gas (LPG). However, as the variety of fuels supplied to the engine increases, there is a problem in that the equipment required to supply them must also increase proportionally. In other words, using multiple fuels requires more installation space on the vessel, and the time and cost required for maintenance also increase. FIG. 1 is a drawing for explaining a fuel supply system according to one embodiment of the present invention. Figure 2 shows the state in which the fuel supply system of Figure 1 supplies ammonia as fuel. Figure 3 shows the state in which the fuel supply system of Figure 1 supplies liquefied petroleum gas as fuel. The advantages and features of the present invention and the 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 but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components. In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it may mean that there is no other part in between. Furthermore, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately below" another part, it may mean that there is no other part in between. Throughout the specification, unless specifically stated otherwise, each component may be singular or plural. Hereinafter, a fuel supply system (101) according to an embodiment of the present invention will be described with reference to FIG. 1. For example, the fuel supply system (101) according to an embodiment of the present invention may be used to supply a plurality of fuels, including a first fuel and a second fuel, to an engine (100). For example, the first fuel may be ammonia ( NH₃ ) and the second fuel may be liquefied petroleum gas (LPG). Referring to FIG. 1, a fuel supply system (101) according to one embodiment of the present invention includes a first fuel tank (810), a second fuel tank (820), a first fuel supply line (610), a second fuel supply line (620), a first low-pressure pump (310), a second low-pressure pump (320), an integrated fuel supply line (650), and a high-pressure pump (350). Additionally, a fuel supply system (101) according to one embodiment of the present invention may further include a first flow detection device (781), a second flow detection device (782), a first fuel supply valve (710), a second fuel supply valve (720), a mixing chamber (550), a first recovery line (661), a second recovery line (662), a pressure regulating valve (770), a water level sensor (7