Honda Motor Co., Ltd.

Other

Steve Mathison

Ryan D Harty

In one or more embodiments, a system and method for filling a compress gas tank or fuel tank is provided, including determining a fill time (t) predicted to produce a gas final temperature (T) based on one or more coefficients selected from a lookup table, mass average dispenser gas temperature for control (MATC), and alpha, determining a pressure ramp rate (RR), delivering gas to the compressed gas tank at a control pressure based on the pressure RR during a first portion of filling the compressed gas tank, determining a mass average enthalpy (MAE) and density, and delivering gas to the compressed gas tank at a target ending fueling pressure based on the density and the gas final temperature during a second portion of filling the compressed gas tank.

Method and system for tank refilling using active fueling speed control

A hydrogen fuel dispenser includes a pre-cooling circuit, a hydrogen fuel storage for storing hydrogen fuel, a nozzle for dispensing hydrogen fuel to a receptacle, and a fueling line connecting the hydrogen fuel storage to the nozzle for communicating hydrogen fuel from the hydrogen fuel storage to the nozzle. The pre-cooling circuit is provided to cool hydrogen fuel in the fueling line, and includes a pre-cooling line connected to the fueling line downstream from the hydrogen fuel storage, and a flow-path selector provided at a connection between the fueling line and the pre-cooling line. The flow-path selector selectively: blocks hydrogen fuel flow between the fueling line and the pre-cooling line while opening hydrogen fuel flow between the fueling line and a nozzle line of the nozzle; and opens hydrogen fuel flow between the fueling line and the pre-cooling line.

Hydrogen fuel dispenser with pre-cooling circuit

Disclosed is an improved analytical method that can be utilized by hydrogen filling stations for directly and accurately calculating the end-of-fill temperature in a hydrogen tank that, in turn, allows for improvements in the fill quantity while tending to reduce refueling time. The calculations involve calculation of a composite heat capacity value, MC, from a set of thermodynamic parameters drawn from both the tank system receiving the gas and the station supplying the gas. These thermodynamic parameters are utilized in a series of simple analytical equations to define a multi-step process by which target fill times, final temperatures and final pressures can be determined. The parameters can be communicated to the station directly from the vehicle or retrieved from a database accessible by the station. Because the method is based on direct measurements of actual thermodynamic conditions and quantified thermodynamic behavior, significantly improved tank filling results can be achieved.

Disclosed is a simple, analytical method that can be utilized by hydrogen filling stations for directly and accurately calculating the end-of-fill temperature in a hydrogen tank that, in turn, allows for improvements in the fill quantity while tending to reduce refueling time. The calculations involve calculation of a composite heat capacity value, MC, from a set of thermodynamic parameters drawn from both the tank system receiving the gas and the station supplying the gas. These thermodynamic parameters are utilized in a series of simple analytical equations to define a multi-step process by which target fill times, final temperatures and final pressures can be determined. The parameters can be communicated to the station directly from the vehicle or retrieved from a database accessible by the station. Because the method is based on direct measurements of actual thermodynamic conditions and quantified thermodynamic behavior, significantly improved tank filling results can be achieved.

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Torrance, CA, United States of America

Steve Mathison