Abstract: An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a tank compartment installed therein with a fuel tank that stores the fuel. The tank compartment is provided below a deck of the hull and provided separately from other compartments.

Abstract: A coreless current sensor module includes: a support member; a first current sensor which is mounted on a first surface of the support member and includes at least one magnetoelectric conversion element which outputs a signal corresponding to a magnitude of a magnetic field; an insulator which surrounds at least the first current sensor in a spaced-apart state as viewed in a first direction intersecting the first surface and at least partially overlaps with the first current sensor as viewed in a second direction extending along the first surface; and a first bus bar through which a current generating a magnetic field detected by the first current sensor flows, in which at least one of the insulator or the support member is present between the first current sensor and the first bus bar.

Abstract: An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied by a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes at least one compartment including an emission source of the fuel, and a vent pipe through which the fuel in the compartment is released to outside of the hull. A release port of the vent pipe is located at a position higher than a cabin or a bridge provided on the hull.

Abstract: An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a compartment including an emission source of the fuel and a first detector arranged in the compartment to detect the fuel. If the first detector detects that a concentration of the fuel in the compartment is equal to or greater than a first threshold value, a power supply to a non-explosion-proof device in the compartment is stopped.

Abstract: A fuel cell ship includes a cooling system that cools a fuel cell. The cooling system includes a cooling medium tank that accommodates a cooling medium, a cooling medium circulation pipe that circulates the cooling medium between the fuel cell and the cooling medium tank, a cooling tank internal gas detector installed in the cooling medium tank, a cooling tank internal gas discharge pipe connected to the cooling medium tank, and a cooling tank internal gas discharge valve installed in the cooling tank internal gas discharge pipe. The fuel cell ship includes a control unit that controls opening and closing of the cooling tank internal gas discharge valve. The control unit opens the cooling tank internal gas discharge valve when the cooling tank internal gas detector detects that the concentration of the fuel gas in the cooling medium tank is equal to or greater than a specified value determined in advance.

Abstract: A fuel cell ship includes a fuel cell compartment in which a fuel cell is installed, a tank compartment in which a fuel tank is installed, a fuel supply pipe through which fuel is supplied from the fuel tank to the fuel cell, and a control unit. The fuel supply pipe includes at least two shutoff valves. Fuel gas detectors that detect a fuel gas being in a gaseous state of the fuel are each installed in the compartments. If at least one of the fuel gas detectors detects that a concentration of the fuel gas is equal to or greater than a predetermined standard value, the control unit controls to close a shutoff valve in a compartment out of the tank compartment and the fuel cell compartment, where the fuel gas detector having detected the concentration equal to or greater than the standard value is installed.

Abstract: A fuel cell system includes: a housing having a module installation compartment in which a fuel cell module is installed; and a double wall portion with an inner wall and an outer wall. The housing has the outer wall. The module installation compartment has the inner wall. The inner wall has a pressure release part. When a pressure in the module installation compartment reaches a predetermined pressure lower than a pressure capacity of the outer wall, the pressure release part releases the pressure.

Abstract: An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a plurality of compartments including an emission source of the fuel, in which the plurality of compartments include a tank compartment installed therein with a fuel tank that stores the fuel and a fuel cell compartment installed therein with the fuel cell. The tank compartment and the fuel cell compartment are each sealed except for a ventilation port through which the inside of the compartment is ventilated.

Abstract: A fuel cell ship includes a cooling system that cools a fuel cell. The cooling system includes a cooling medium tank that accommodates a cooling medium, a cooling medium circulation pipe that circulates the cooling medium between the fuel cell and the cooling medium tank, a cooling tank internal gas detector installed in the cooling medium tank, a cooling tank internal gas discharge pipe connected to the cooling medium tank, and a cooling tank internal gas discharge valve installed in the cooling tank internal gas discharge pipe. The fuel cell ship includes a control unit that controls opening and closing of the cooling tank internal gas discharge valve. The control unit opens the cooling tank internal gas discharge valve when the cooling tank internal gas detector detects that the concentration of the fuel gas in the cooling medium tank is equal to or greater than a specified value determined in advance.

Abstract: A fuel cell ship includes a fuel cell compartment in which a fuel cell is installed, a tank compartment in which a fuel tank is installed, a fuel supply pipe through which fuel is supplied from the fuel tank to the fuel cell, and a control unit. The fuel supply pipe includes at least two shutoff valves. Fuel gas detectors that detect a fuel gas being in a gaseous state of the fuel are each installed in the compartments. If at least one of the fuel gas detectors detects that a concentration of the fuel gas is equal to or greater than a predetermined standard value, the control unit controls to close a shutoff valve in a compartment out of the tank compartment and the fuel cell compartment, where the fuel gas detector having detected the concentration equal to or greater than the standard value is installed.

Abstract: A fuel cell ship includes a fuel cell that generates electric power by an electrochemical reaction of fuel, a propulsion device that generates propulsive force on a hull by electric power supplied from the fuel cell, a fuel supply pipe through which the fuel is supplied from a fuel tank housing the fuel to the fuel cell, a duct compartment that houses a part of the fuel supply pipe, a vent pipe that communicates with the duct compartment, and a fuel filling port that serves as an inlet for filling the fuel tank with the fuel. The fuel filling port is provided in the duct compartment.

Abstract: A fuel cell ship includes a propulsion device that generates propulsive force on a hull by electric power, an electric power supply unit that supplies the electric power to the propulsion device, and a degradation rate control unit that adjusts a degradation rate. The electric power supply unit includes a plurality of fuel cells that generate electric power by an electrochemical reaction of fuel and at least one storage battery.

Abstract: There is provided a current measurement module. The current measurement module includes: a conductor including two main body portions arranged side by side in a first direction, and two current path portions arranged side by side in a second direction orthogonal to the first direction with a through hole interposed therebetween and for connecting the two main body portions; and a magnetic field sensing element including a magnetosensitive surface for detecting magnetic fields generated by currents flowing through the two current path portions, wherein the through hole has a protruding portion which locally protrudes in the second direction only on one side adjacent to a current path portion, and, in the current path portion on the one side, a narrow portion having a narrower width in the second direction than that of another current path portion on another side is formed.

Abstract: There is provided a current measurement module including: a conductor which has two main body units arranged side by side in a first direction, and two current paths arranged side by side across a through hole in a second direction perpendicular to the first direction, and connecting the two main body units; and two magnetic detection elements which include magnetic sensing surfaces for detecting a component in a third direction perpendicular to the first direction and the second direction, in magnetic fields that are generated by currents flowing through the two current paths, and which are arranged side by side in the second direction, in which when viewed from the third direction, the two magnetic detection elements are arranged inside the through hole, and in the second direction, a center position between the two magnetic detection elements is close to either one of the two current paths.

Abstract: An exemplary fuel cell system includes a housing including a first section in which a fuel cell module and a hydrogen flow passage are disposed and a second section which is adjacent to the first section and in which an auxiliary machine is disposed. The housing has a connection part between the hydrogen flow passage and an external hydrogen flow passage disposed outside the housing, on a wall different from a partition wall sectioning the first section and the second section among walls constituting the first section.

Abstract: Provided is a current detection device, comprising at least two bus bars each of which includes a magnetic detection element, a first current path having a larger cross-sectional area, and a second current path having a smaller cross-sectional area, the first current path and the second current path sandwiching the magnetic detection element, wherein the at least two bus bars are arranged such that the first current paths face each other. The current detection device may further comprise another bus bar that is arranged between the at least two bus bars, and includes a magnetic detection element, a third current path having a large cross-sectional area, and a fourth current path having a small cross-sectional area, to the third current path and the fourth current path sandwiching the magnetic detection element.

Abstract: A fuel cell system includes a fuel cell module having a fuel cell stack, a fuel gas system that supplies a fuel gas to the fuel cell stack, and a ventilation flow generator. The fuel gas system includes a fuel gas leakage risk portion. The ventilation flow generator generates a ventilation flow directed to the fuel gas leakage risk portion.

Abstract: A fuel cell system includes: a fuel cell module having a fuel cell stack; a fuel gas system that supplies a fuel gas to the fuel cell stack; an upstream-side block valve and a downstream-side block valve that open and close the fuel gas system; a vent system that is provided to branch from the fuel gas system between the upstream-side block valve and the downstream-side block valve; and a bleed valve that opens and closes the vent system. When an operation of the fuel cell stack is to be stopped, pressure reduction control, in which the bleed valve is opened after the upstream-side block valve is closed, and then the downstream-side block valve is closed after a predetermined time has elapsed, is performed.

Abstract: An exemplary fuel cell system includes a fuel cell module, an air intake unit that takes air into the fuel cell module, and a housing that houses the fuel cell module and the air intake unit. The housing includes a first outer surface wall on which a desalination device is disposed upstream of the air intake unit, and a second outer surface wall provided with an electric wire arrangement part in which an electric wire is arranged.

Abstract: A fuel cell ship includes a fuel cell compartment in which a fuel cell is installed, a tank compartment in which a fuel tank is installed, a fuel supply pipe through which fuel is supplied from the fuel tank to the fuel cell, and a control unit. The fuel supply pipe includes at least two shutoff valves. Fuel gas detectors that detect a fuel gas being in a gaseous state of the fuel are each installed in the compartments. If at least one of the fuel gas detectors detects that a concentration of the fuel gas is equal to or greater than a predetermined standard value, the control unit controls to close a shutoff valve in a compartment out of the tank compartment and the fuel cell compartment, where the fuel gas detector having detected the concentration equal to or greater than the standard value is installed.