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Method and system for tank refilling

  • US 9,212,783 B2
  • Filed: 03/15/2013
  • Issued: 12/15/2015
  • Est. Priority Date: 04/21/2010
  • Status: Active Grant
First Claim
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1. A method of filling a compressed gas tank, the method comprising:

  • calculating a hot soak initial temperature THSinit for an initial mass of gas within the tank;

    determining a projected fill time through THSinit that is predicted to produce a gas final temperature Tfinal no greater than a target temperature T;

    calculating an initial cold soak initial temperature TCSinit for an initial mass of gas within the tank;

    calculating for the tank a composite heat capacity value MC corresponding to heat transferred to the tank, a tank assembly, connection components and the initial mass of gas within the tank gas, while filling the tank;

    determining a target pressure Ptarget through TCSinit that is predicted to produce a target state of charge within the tank; and

    delivering gas to the tank at a pressure ramp rate that will achieve Ptarget at the projected fill time.

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