Engine room ventilation system for ammonia fueled ships

Abstract

The present invention provides an engine room ventilation system for an ammonia-fueled vessel that performs ventilation for an engine room and an engine control room of a vessel using ammonia as fuel, comprising: a plurality of ventilation units communicating with the engine room and discharging indoor air from the engine room to the outside or supplying outdoor air into the engine room; a ventilation flow path connecting the engine control room to at least one ventilation unit; an opening / closing unit disposed in the ventilation flow path and opening / closing the ventilation flow path; and a control unit that controls the operation of the ventilation units and the opening / closing unit so that outdoor air is supplied from the ventilation units into the engine room so that the engine room is maintained at a pressure state higher than atmospheric pressure, and so that when a fuel leak is detected in the engine room, the internal pressure of the engine control room becomes higher than the internal pressure of the engine room.

Description

Technology Field

[0001] The present invention relates to an engine room ventilation system for an ammonia fuel vessel that performs ventilation of the engine room within an ammonia fuel vessel using liquid ammonia as fuel. Background Technology

[0002] 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.

[0003] 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; ammonia is emerging as one of the next-generation eco-friendly fuels because it emits no carbon dioxide during combustion and is easy to store due to its high liquefaction point.

[0004] In such ammonia-fueled vessels, proper ventilation and pressure control are essential to minimize fuel toxicity and fire risks.

[0005] In particular, the engine room, where ammonia fuel is supplied and consumed, is an area where the importance of the ventilation system is emphasized.

[0006] To this end, the ship's engine room (E / R) maintains a pressure higher than the external atmospheric pressure by operating the E / R fan; however, the engine control room (ECR), where the crew resides at all times, is equipped with a ventilation system using the E / R fan, but under normal circumstances, the vents through the E / R fan are closed, and the internal air is circulated and cooled solely by the cooling system (Unit Cooler), resulting in a pressure lower than that of the engine room.

[0007] Therefore, if ammonia leaks from the engine compartment, there is a high risk that ammonia gas will enter the engine control room due to the pressure difference.

[0008] The relevant technology for such an engine room ventilation system for an ammonia-fueled ship is disclosed in Korean Registered Patent Publication No. 10-2514087 (March 24, 2023). The problem to be solved

[0009] The purpose of the present invention is to provide an engine room ventilation system for an ammonia-fueled vessel that ensures the safety of crew members by preventing ammonia from entering the engine control room even if ammonia fuel leakage occurs in the engine room. means of solving the problem

[0010] The present invention provides an engine room ventilation system for an ammonia-fueled vessel that performs ventilation for an engine room and an engine control room of a vessel using ammonia as fuel, comprising: a plurality of ventilation units communicating with the engine room and discharging indoor air from the engine room to the outside or supplying outdoor air into the engine room; a ventilation flow path connecting the engine control room to at least one ventilation unit; an opening / closing unit disposed in the ventilation flow path and opening / closing the ventilation flow path; and a control unit that controls the operation of the ventilation units and the opening / closing unit so that outdoor air is supplied from the ventilation units into the engine room so that the engine room is maintained at a pressure state higher than atmospheric pressure, and so that when a fuel leak is detected in the engine room, the internal pressure of the engine control room becomes higher than the internal pressure of the engine room.

[0011] In addition, among the plurality of the above ventilation units, the ventilation unit connected to the ventilation flow path may only operate to supply outside air into the engine room.

[0012] In addition, the engine room is equipped with a pressure sensor for detecting pressure within the engine room and a leak sensor for detecting fuel leakage within the engine room, and the control unit may include a normal mode that controls the operation of the ventilation unit and the opening / closing unit so that the pressure measured by the pressure sensor becomes higher than atmospheric pressure when no fuel leakage is detected by the leak sensor, and an emergency mode that controls the operation of the ventilation unit and the opening / closing unit so that the pressure measured by the pressure sensor becomes lower or higher than atmospheric pressure when a fuel leakage is detected by the leak sensor.

[0013] Additionally, the above emergency mode may include a first emergency mode that controls the operation of the ventilation unit and the opening / closing unit so that the internal pressure of the engine room becomes lower than the internal pressure of the engine control room when the fuel concentration measured by the leak detection sensor is within the leak standard range, and a second emergency mode that controls the operation of the ventilation unit and the opening / closing unit so that the internal pressure of the engine control room becomes higher than the internal pressure of the engine room when the fuel concentration measured by the leak detection sensor exceeds the leak standard range.

[0014] In addition, the above leakage standard range may be 29 to 149 ppm.

[0015] In addition, the above normal mode operates so that all ventilation units supply outside air into the engine room, and the above opening / closing unit can operate to close the ventilation passage.

[0016] In addition, the first emergency mode described above may be operated such that some ventilation units supply outside air into the interior of the engine room, the remaining ventilation units discharge the interior air of the engine room to the outside, and the opening / closing unit may be operated to close the ventilation passage.

[0017] In addition, the above second emergency mode is configured such that some ventilation units are operated to supply outside air into the engine room, and the remaining ventilation units, excluding the ventilation units supplying outside air, are operated to discharge the inside air of the engine room to the outside, and the above opening / closing unit can be operated to open the ventilation passage. Effects of the invention

[0018] The engine room ventilation system for an ammonia fuel vessel according to the present invention allows the internal air inside the engine room to be discharged to the outside or the external air to be supplied into the engine room through a plurality of ventilation units so that the engine room is maintained at a pressure higher than atmospheric pressure. If a fuel leak is detected in the engine room, the control unit controls the operation of the ventilation unit (100) and the opening / closing unit to open the ventilation passage, thereby maintaining the internal pressure of the engine control room higher than the internal pressure of the engine room, thus blocking the leaked fuel from flowing into the engine control room and ensuring the safety of the crew in the engine control room. Brief explanation of the drawing

[0019] FIG. 1 is a schematic diagram showing an engine room ventilation system for an ammonia fuel ship according to one embodiment of the present invention. FIGS. 2 and 3 are configuration diagrams showing the operating state in emergency mode of an engine room ventilation system for an ammonia fuel ship according to one embodiment of the invention. Specific details for implementing the invention

[0020] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0021] Referring to FIGS. 1 to 3, an engine room ventilation system for an ammonia fuel ship according to an embodiment of the present invention may include a ventilation unit (100), a ventilation flow path unit (200), an opening / closing unit (300), and a control unit (400). Such an engine room ventilation system for an ammonia fuel ship performs ventilation for the engine room (10) and engine control room (20) of a ship that uses ammonia as fuel. Here, a pressure measuring sensor (11) for detecting pressure inside the engine room (10) and a leak detection sensor (12) for detecting fuel leakage inside the engine room (10) may be provided inside the engine room (10). The pressure measuring sensor (11) and the leak detection sensor (12) are connected to a control unit (400) to transmit the measured pressure value and fuel leakage value to the control unit (400). Additionally, the engine room (10) is equipped with an auxiliary damper (13) that discharges the internal air of the engine room (10) to the outside, and the engine control room (20) may be equipped with a cooler (21) that supplies cold air to the engine control room (20).

[0022] The above ventilation unit (100) can be arranged to be connected to the engine room (10) of the ship.

[0023] The above ventilation unit (100) enables the exhaust of air inside the engine room (10) to the outside or the supply of air outside to the engine room (10).

[0024] Here, the ventilation unit (100) may be provided in multiple numbers.

[0025] For example, the ventilation unit (100) may be composed of a first ventilation unit (100a), a second ventilation unit (100b), a third ventilation unit (100c), and a fourth ventilation unit (100d).

[0026] The above ventilation unit (100) may include a ventilation fan (110) and a ventilation duct (120).

[0027] The above ventilation fan (110) generates suction or exhaust force to inhale outside air or exhaust inside air.

[0028] Here, the ventilation fan (110) is connected to a control unit (400) to be described later via a wired means such as a cable or a wireless means such as Bluetooth, Wi-Fi, or infrared communication, and is operated to suck in outside air or discharge inside air according to a control signal input from the control unit (400).

[0029] The above ventilation duct (120) connects the ventilation fan (110) and the engine room (10) to each other.

[0030] At this time, one side of the ventilation duct (120) is connected to the ventilation fan (110), and the other side of the ventilation duct (120) can be connected to the engine room (10).

[0031] The above ventilation channel (200) connects an engine control room (20) located inside the engine room (10) with at least one ventilation channel (100).

[0032] For example, one side of the ventilation passage (200) may be connected to the ventilation duct (120) of the fourth ventilation section (100d) of the ventilation section (100), and the other side of the ventilation passage (200) may be connected to the engine control room (20).

[0033] Here, the ventilation fan (110) of the ventilation unit (100) communicating with the ventilation channel (200) can only perform the operation of supplying outside air in the direction of the engine room (10).

[0034] In this way, the ventilation channel (200) guides some of the outside air supplied to the engine room (10) through the ventilation channel (100) to move to the engine control room (20).

[0035] The above opening / closing part (300) can be placed in the ventilation flow path part (200).

[0036] The above-mentioned opening / closing unit (300) can allow outside air flowing from the ventilation unit (100) into the ventilation flow path (200) to be supplied to the engine control room (20), or block outside air from being supplied to the engine control room (20).

[0037] For example, the above opening / closing part (300) can be applied as a duct damper or valve.

[0038] Here, the opening / closing unit (300) is connected to a control unit (400) to be described later via a wired means such as a cable or a wireless means such as Bluetooth, Wi-Fi, or infrared communication, and operates to open / close the ventilation flow path (200) according to a control signal input from the control unit (400).

[0039] The above control unit (400) can be connected to the ventilation unit (100), the opening / closing unit (300), the pressure measuring sensor (11), and the leak detection sensor (12).

[0040] The above-mentioned control unit (400) controls the operation of the ventilation unit (100) and the opening / closing unit (300) so that outside air is supplied from the ventilation unit (100) into the engine room (10) so that the engine room (10) is maintained at a pressure higher than atmospheric pressure, and when a fuel leak is detected in the engine room (10), the internal pressure of the engine control room (20) becomes higher than the internal pressure of the engine room (10).

[0041] The above control unit (400) may include a normal mode and an emergency mode.

[0042] Here, the normal mode controls the operation of the ventilation unit (100) and the opening / closing unit (300) so that when no fuel leak is detected in the engine room (10) by the leak detection sensor (12), the internal pressure of the engine room (10) measured by the pressure measurement sensor (11) becomes higher than atmospheric pressure.

[0043] For example, the above normal mode operates such that each ventilation fan (110) of the first ventilation unit (100a), the second ventilation unit (100b), the third ventilation unit (100c), and the fourth ventilation unit (100d) of the ventilation unit (100) supplies outside air into the engine room (10).

[0044] And, in the above normal mode, the opening / closing part (300) operates to close the ventilation passage (200), thereby maintaining a state in which outside air is not supplied into the engine control room (20).

[0045] In this normal mode, the internal pressure of the engine room (10) is maintained higher than atmospheric pressure, and the internal pressure of the engine control room (20) is maintained at the same level as atmospheric pressure.

[0046] The above emergency mode controls the operation of the ventilation unit (100) and the opening / closing unit (300) so that when a fuel leak in the engine room (10) is detected by the leak detection sensor (12), the internal pressure of the engine room (10) measured by the pressure measurement sensor (11) becomes lower or higher than atmospheric pressure.

[0047] The above emergency mode may include a first emergency mode and a second emergency mode.

[0048] The above first emergency mode controls the operation of the ventilation unit (100) and the opening / closing unit when the fuel concentration measured by the leak detection sensor (12) is within the leak standard range. Here, the leak standard range may be 29 to 149 ppm.

[0049] For example, in the first emergency mode, each ventilation fan (110) of the first ventilation unit (100a) and the fourth ventilation unit (100d) of the ventilation unit (100) operates to supply outside air into the interior of the engine room (10), and each ventilation fan (110) of the second ventilation unit (100b) and the third ventilation unit (100c) operates to discharge the interior air of the engine room (10) to the outside.

[0050] At this time, in the first emergency mode, the rotational speed of the ventilation fan (110) of the first ventilation unit (100a) and the fourth ventilation unit (100d) of the ventilation unit (100) can be driven faster than the rotational speed of the ventilation fan (110) of the second ventilation unit (100b) and the third ventilation unit (100c) so that the flow rate of outside air entering the engine room (10) in the first emergency mode is greater than the flow rate of inside air discharged from the engine room (10) to the outside.

[0051] And, in the first emergency mode, the opening / closing unit (300) operates to close the ventilation passage unit (200), thereby maintaining a state where outside air is not supplied into the engine control room (20).

[0052] In the above-mentioned first emergency mode, when the concentration of fuel in the engine room (10) is detected to be within the leakage standard range, the leaked fuel in the engine room (10) is discharged by exchanging the internal air and the external air in the engine room (10), thereby maintaining the internal pressure of the engine room (10) lower than atmospheric pressure and maintaining the internal pressure of the engine control room (20) equal to atmospheric pressure, so that the leaked fuel in the engine room (10) can be blocked from flowing into the engine control room (20).

[0053] The above second emergency mode controls the operation of the ventilation unit (100) and the opening / closing unit when the fuel concentration measured by the leak detection sensor (12) exceeds the leak standard range.

[0054] For example, the second emergency mode stops the operation of the ventilation fan (110) of the first ventilation unit (100a) of the ventilation unit (100), operates the ventilation fan (110) of the fourth ventilation unit (100d) to supply outside air into the engine room (10), and each ventilation fan (110) of the second ventilation unit (100b) and the third ventilation unit (100c) operates to discharge the inside air of the engine room (10) to the outside.

[0055] And, in the case of the second emergency mode, the opening / closing unit (300) operates to open the ventilation flow path (200), thereby maintaining a state in which some of the outside air supplied to the engine room (10) through the fourth ventilation unit (100d) is supplied into the interior of the engine control room (20).

[0056] In the above second emergency mode, when the concentration of fuel in the engine room (10) is detected to exceed the leakage standard range, the internal pressure of the engine room (10) is maintained higher than atmospheric pressure, and the leaked fuel in the engine room (10) is discharged through the exchange of internal air and external air in the engine room (10), and the internal pressure of the engine control room (20) is maintained higher than the internal pressure of the engine room (10), thereby blocking the flow of leaked fuel in the engine room (10) into the engine control room (20).

[0057] In this embodiment, the engine room ventilation system for an ammonia fuel vessel allows the engine room to be maintained at a pressure higher than atmospheric pressure by discharging the internal air from the engine room (10) to the outside or supplying the external air into the engine room (10). If a fuel leak is detected in the engine room (10), the control unit (400) controls the operation of the ventilation unit (100) and the opening / closing unit (300) to open the ventilation flow path (200), thereby maintaining the internal pressure of the engine control room (20) higher than the internal pressure of the engine room (10). This prevents the leaked fuel from entering the engine control room (20), thereby ensuring the safety of the crew in the engine control room (20).

[0058] The present invention has been described with reference to embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0059] 10: Engine bay 20: Engine Control Room 100: Ventilation unit 110: Ventilation fan 120: Ventilation duct 200: Ventilation Euro section 300: Opening / closing part

Claims

Claim 1 An engine room ventilation system for an ammonia-fueled ship that performs ventilation for an engine room and an engine control room of a ship that uses ammonia as fuel, comprising: a plurality of ventilation units communicating with the engine room and discharging indoor air from the engine room to the outside or supplying outdoor air into the engine room; a ventilation flow path connecting the engine control room to at least one ventilation unit; an opening / closing unit disposed in the ventilation flow path and opening / closing the ventilation flow path; and a control unit that controls the operation of the ventilation units and the opening / closing unit so that outdoor air is supplied from the ventilation units into the engine room so that the engine room is maintained at a pressure state higher than atmospheric pressure, and so that when a fuel leak is detected in the engine room, the internal pressure of the engine control room becomes higher than the internal pressure of the engine room. Claim 2 An engine room ventilation system for an ammonia fuel vessel according to claim 1, wherein the ventilation unit connected to the ventilation flow path among the plurality of ventilation units operates only to supply outside air into the engine room. Claim 3 An engine room ventilation system for an ammonia fuel vessel according to claim 1, wherein the engine room is equipped with a pressure measuring sensor for detecting pressure within the engine room and a leak detection sensor for detecting fuel leakage within the engine room, and the control unit comprises a normal mode that controls the operation of the ventilation unit and the opening / closing unit so that the pressure measured by the pressure measuring sensor becomes higher than atmospheric pressure when no fuel leakage is detected by the leak detection sensor, and an emergency mode that controls the operation of the ventilation unit and the opening / closing unit so that the pressure measured by the pressure measuring sensor becomes lower or higher than atmospheric pressure when a fuel leakage is detected by the leak detection sensor. Claim 4 An engine room ventilation system for an ammonia fuel vessel according to claim 3, wherein the emergency mode comprises a first emergency mode that controls the operation of the ventilation unit and the opening / closing unit so that the internal pressure of the engine room becomes lower than the internal pressure of the engine control room when the fuel concentration measured by the leak detection sensor is within the leak standard range, and a second emergency mode that controls the operation of the ventilation unit and the opening / closing unit so that the internal pressure of the engine control room becomes higher than the internal pressure of the engine room when the fuel concentration measured by the leak detection sensor exceeds the leak standard range. Claim 5 An engine room ventilation system for an ammonia fuel ship according to claim 4, wherein the leakage standard range is 29 to 149 ppm. Claim 6 An engine room ventilation system for an ammonia fuel vessel according to claim 3, wherein the normal mode is operated such that all ventilation units supply outside air into the interior of the engine room, and the opening / closing unit is operated such that the ventilation passage is closed. Claim 7 An engine room ventilation system for an ammonia fuel vessel according to claim 4, wherein the first emergency mode is operated such that some ventilation units are operated to supply outside air into the interior of the engine room, the remaining ventilation units are operated to discharge the interior air of the engine room to the outside, and the opening / closing unit is operated to close the ventilation passage. Claim 8 An engine room ventilation system for an ammonia fuel vessel according to claim 4, wherein the second emergency mode is operated such that some ventilation units are operated to supply outside air into the interior of the engine room, and the remaining ventilation units other than the ventilation units supplying outside air are operated to discharge the interior air of the engine room to the outside, and the opening / closing unit is operated to open the ventilation passage.

Images