Patent ID: 7647194

Claim:
A method for calculating temperature of hydrogen of on-board storage tank during vehicle fueling without communication of temperature, pressure or volume signals from vehicle to dispenser comprising: measuring a mass added (w a ) of hydrogen in said-board storage tank at the dispenser; measuring an ambient temperature (T a ) at the dispenser; measuring a static initial pressure (P o ) of said hydrogen in said on-board storage tank at the dispenser; measuring a static pressure during fueling (P f ) of said hydrogen in said on-board storage tank at the dispenser; measuring a fill time during fueling (dt) of said hydrogen to said on-board storage tank at the dispenser; measuring a moles added (m a ) of hydrogen in an on-board storage tank at the dispenser; calculating a moles during fueling (m f ) of said hydrogen in said on-board storage tank; calculating a volume (V) for said on-board storage tank; calculating an initial density (ρ o ) of hydrogen; and calculating, by a processor, a temperature during fueling (T f ) of said hydrogen in said on-board storage tank with an equation T f =(−ρ o *V *(−435+10.49 *T a −0.01174 *P o )− m a *(−464.7+14.7 *T a +0.04197 *P f ) (0.2336+0.00264 *V )* dt *( T a +50 w a /(0.0241 *V ))+ m f *(−435−0.01174 *P f ))/(−10.49 *m f −(0.2336+0.00264 *V )* dt ).