Gas fueling method
In order to provide a gas fueling method capable of suppressing overheating of a tank immediately after a start of fueling, in the gas fueling method, an accumulator and a hydrogen tank are coupled to each other with a gas flow passage. In a main fueling control at and after the timing t 2 , a sensor-based value MAT of a temperature parameter of a measurement position Q 1 is calculated on the basis of a detection value of a first station temperature sensor, and the fueling control is performed on the basis of the sensor-based value MAT. In an initial fueling control at the timing t 0 to t 2 , a prediction value MAT_pred of the temperature parameter is calculated at the timing t 2 on the basis of an ambient temperature value, a mass flow rate value, and a heat capacity. The fueling control is performed on the basis of the prediction value MAT_pred.
1. A gas fueling method between a gas supply source and a tank of a mobile object coupled to each other with a gas flow passage provided with a cooling device and a flow rate regulator to perform a fueling control on the basis of a temperature parameter at a first predetermined position of the gas flow passage, the gas fueling method comprising:
a process for acquiring an ambient temperature, a mass flow rate of a gas flowing through the gas flow passage, and a gas temperature value or a temperature value relating to the gas at a second predetermined position located on an upstream side of the first predetermined position in the middle of the gas flow passage; and
a process for predicting a value of the temperature parameter after a prediction time for a case where gas fueling is continuously performed from a current timing to the prediction time or later on the basis of a heat capacity from the first predetermined position to the second predetermined position that is separated from the first predetermined position by a certain distance, the acquired ambient temperature value, the acquired mass flow rate value, and the acquired temperature value,
wherein a fueling control is performed on the basis of the prediction value of the temperature parameter, and
wherein the gas flow passage further comprises a joint portion that couples the gas flow passage at the first predetermined position to the gas flow passage at the second predetermined position, and the second predetermined position is placed across the joint portion from the first predetermined position.
2. The gas fueling method according to claim 1 , further comprising
a process for calculating a value of the temperature parameter on the basis of a detection value of a first gas temperature sensor provided in the first predetermined position and the acquired mass flow rate value after the prediction time elapses,
wherein a fueling control is performed on the basis of the prediction value of the temperature parameter until the prediction time elapses,
a fueling control is performed on the basis of the calculation value of the temperature parameter after the prediction time elapses, and
the prediction time changes depending on the acquired mass flow rate value.
3. The gas fueling method according to claim 2 , wherein the prediction time is set to be longer in a case where the acquired mass flow rate value is lower than a predetermined value, compared to a case where the acquired mass flow rate value is higher than the predetermined value.
4. The gas fueling method according to claim 1 , wherein the gas flow passage has a first pipe extending from the supply source, a second pipe extending from a nozzle portion coupled to a receptacle of the mobile object, and a joint portion that couples the first and second pipes to each other,
the cooling device is provided in the first pipe,
the first predetermined position is set in the nozzle portion or between the nozzle portion and the joint portion, and
the second predetermined position is set in the joint portion, in the cooling device, or between the joint portion and the cooling device.
5. The gas fueling method according to claim 2 , wherein the gas flow passage has a first pipe extending from the supply source, a second pipe extending from a nozzle portion coupled to a receptacle of the mobile object, and a joint portion that couples the first and second pipes to each other,
the cooling device is provided in the first pipe,
the first predetermined position is set in the nozzle portion or between the nozzle portion and the joint portion, and
the second predetermined position is set in the joint portion, in the cooling device, or between the joint portion and the cooling device.
6. The gas fueling method according to claim 3 , wherein the gas flow passage has a first pipe extending from the supply source, a second pipe extending from a nozzle portion coupled to a receptacle of the mobile object, and a joint portion that couples the first and second pipes to each other,
the cooling device is provided in the first pipe,
the first predetermined position is set in the nozzle portion or between the nozzle portion and the joint portion, and
the second predetermined position is set in the joint portion, in the cooling device, or between the joint portion and the cooling device.
7. The gas fueling method according to claim 1 , wherein a first temperature sensor is disposed at the first predetermined position and configured to detect a gas temperature, and a second temperature sensor is disposed at the second predetermined position and configured to detect a gas temperature, and
wherein the temperature parameter at the first predetermined position is obtained based on the gas temperature detected by the first temperature sensor, and the gas temperature value or the temperature value relating to the gas at the second predetermined position is obtained based on the gas temperature detected by the second temperature sensor.