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KR-20260062163-A - FUEL GAS SUPPLY SYSTEM

KR20260062163AKR 20260062163 AKR20260062163 AKR 20260062163AKR-20260062163-A

Abstract

A fuel gas supply system is disclosed. The fuel gas supply system comprises: a first fuel supply line connected to an ammonia tank in which ammonia fuel is stored and supplying the ammonia fuel stored in the ammonia tank to an engine; a second fuel supply line branched from the first fuel supply line and provided with a reformer that generates hydrogen fuel by thermally decomposing the incoming ammonia fuel, and supplying the hydrogen fuel generated by the reformer to the engine; a first injector that injects the ammonia fuel supplied through the first fuel supply line into the cylinder of the engine; and a second injector that injects the hydrogen fuel supplied through the second fuel supply line into the cylinder of the engine.

Inventors

  • 최성우
  • 이동엽
  • 이해원

Assignees

  • 삼성중공업 주식회사

Dates

Publication Date
20260507
Application Date
20241025

Claims (9)

  1. A first fuel supply line connected to an ammonia tank in which ammonia fuel is stored, and which supplies the ammonia fuel stored in the ammonia tank to an engine; A second fuel supply line branched from the first fuel supply line and provided with a reformer that generates hydrogen fuel by thermally decomposing the incoming ammonia fuel, and supplies the hydrogen fuel generated by the reformer to the engine; A first injector that injects ammonia fuel supplied through the first fuel supply line into the cylinder of the engine; and A fuel gas supply system comprising: a second injector that injects hydrogen fuel supplied through the second fuel supply line into the cylinder of the engine.
  2. In paragraph 1, The inlet end of the above-mentioned second fuel supply line is Branched from the above first fuel supply line, and At the branching point A fuel gas supply system provided with a branch valve for controlling the amount of ammonia fuel flowing from the first fuel supply line to the second fuel supply line.
  3. In paragraph 1, The above first fuel supply line is A first pump that transfers the ammonia fuel stored in the ammonia tank to the point where the second fuel supply line branches off on the first fuel supply line, and A fuel gas supply system comprising a second pump for pressurizing ammonia fuel, provided at the downstream end of the point where the second fuel supply line branches off from the first fuel supply line.
  4. A first fuel supply line connected to an ammonia tank in which ammonia fuel is stored, and which supplies the ammonia fuel stored in the ammonia tank to an engine; A reformer is provided that is connected to the ammonia tank and receives ammonia fuel stored in the ammonia tank and pyrolyzes it to produce hydrogen fuel, and a second fuel supply line supplies the hydrogen fuel produced by the reformer to the engine; A first injector that injects ammonia fuel supplied through the first fuel supply line into the cylinder of the engine; and It includes a second injector that injects hydrogen fuel supplied through the second fuel supply line into the cylinder of the engine; The above first fuel supply line and the above second fuel supply line are A fuel gas supply system independently connected to the ammonia tank and the engine, respectively.
  5. In paragraph 4, The above first fuel supply line is It includes a first pump that transfers ammonia fuel stored in the ammonia tank to the engine, and The above second fuel supply line is A fuel gas supply system comprising a second pump for transferring ammonia fuel stored in the ammonia tank to the reformer.
  6. In paragraph 1 or 4, The above second fuel supply line is A compressor that pressurizes the hydrogen fuel generated by the above reformer and A fuel gas supply system comprising a hydrogen storage tank provided at the downstream end of the compressor and storing hydrogen fuel pressurized through the compressor.
  7. In paragraph 1 or 4, The above first injector and the above second injector are A fuel gas supply system provided at the top of the cylinder of the above-mentioned engine.
  8. In paragraph 1 or 4, The above first injector It is provided on the upper part of the cylinder of the above engine, and The above second injector A fuel gas supply system provided on the cylinder side of the above-mentioned engine.
  9. In paragraph 1 or 4, The above engine is A fuel gas supply system installed on a ship.

Description

Fuel Gas Supply System The present invention relates to a fuel gas supply system, and more specifically, to a fuel gas supply system using ammonia fuel. Generally, various engines installed on ships generate power by burning fossil fuels, and the exhaust gases produced during the combustion process contain nitrogen oxides, sulfur oxides, carbon dioxide, etc. As air pollution caused by pollutants in exhaust gases increases, there is a demand for the development of eco-friendly ships that generate power using low-carbon or decarbonized fuels, and ammonia is emerging as one of the next-generation eco-friendly fuels because it emits no carbon dioxide during combustion. Recently, dual-fuel marine engines using ammonia fuel as the primary fuel and diesel fuel as the pilot fuel are being researched. In this case, the diesel fuel acting as the pilot fuel serves as an ignition source for the ammonia fuel. However, although these diesel fuels are used in small quantities, carbon dioxide is generated from them. As global agreements to reduce carbon dioxide are strengthened, it is also necessary to suppress the carbon dioxide generated by using diesel fuel as a pilot fuel. Furthermore, the need for a new fuel gas supply system that does not generate carbon dioxide is emerging. FIG. 1 is a drawing showing an example of a fuel gas supply system according to one embodiment of the present invention. FIG. 2 is a drawing showing an example of a first injector and a second injector included in the fuel gas supply system of FIG. 1. FIG. 3 is a drawing showing another example of a first injector and a second injector included in the fuel gas supply system of FIG. 1. FIG. 4 is a drawing showing an example of a fuel gas supply system according to another embodiment of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments introduced below are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms. To clearly explain the present invention, parts unrelated to the description have been omitted from the drawings, and in the drawings, the width, length, thickness, etc., of components may be exaggerated for convenience. Throughout the specification, the same reference numerals indicate the same components. FIG. 1 is a drawing showing an example of a fuel gas supply system according to one embodiment of the present invention. Referring to FIG. 1, a fuel gas supply system (1000A) according to one embodiment may include a first fuel supply line (L1), a second fuel supply line (L2), a first injector (I1), and a second injector (I2). Meanwhile, in order to understand the fuel gas supply system (1000A), it is necessary to first understand the engine (E). The engine (E) may be a dual-fuel engine. Generally, dual-fuel engines are often based on diesel engines that self-ignite by compressing the intake air to high temperature and high pressure. In this case, the dual-fuel engine requires not only a main fuel injector that injects the main fuel into the engine cylinder, but also a pilot injector that injects pilot fuel to induce ignition of the main fuel. In particular, in the marine sector, dual-fuel engines using ammonia fuel as the primary fuel and diesel fuel as the pilot fuel are being researched. In this case, the diesel fuel acting as the pilot fuel serves as an ignition source for the ammonia fuel. However, even in the case of dual-fuel engines that use ammonia fuel as the primary fuel and diesel fuel as the pilot fuel, there is a problem in that carbon dioxide is generated from the diesel fuel, even though only a small amount of diesel fuel is used as the pilot fuel. The fuel gas supply system (1000A) aims to solve these problems and provide a carbon-free engine (E) that does not generate carbon dioxide. In particular, to understand the fuel gas supply system (1000A), it is necessary to understand in advance that the engine (E) is a dual-fuel engine, the first injector (I1) is a main fuel injector that injects ammonia fuel (e.g., ammonia fuel (1a) of FIG. 1), the second injector (I2) is a pilot injector that injects hydrogen fuel (e.g., hydrogen fuel (2) of FIG. 1), the first fuel supply line (L1) is a line that supplies ammonia fuel (e.g., ammonia fuel (1a) of FIG. 1) to the engine (E), and the second fuel supply line (L2) is a line that supplies hydrogen fuel (e.g., hydrogen fuel (2) of FIG. 1) to the engine (E). That is, the fuel gas supply system (1000A) can provide a carbon-free engine (E) in which the main fuel and pilot fuel each do not correspond to diesel fuel. Below, the fuel gas supply system (1000A) will be described in detail. As described above, the fuel gas supply system (1000A) may include a first