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Old 02-19-15, 12:52 PM   #46
buffalobillpatrick
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Join Date: Mar 2014
Location: Florissant, Colorado
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A/C, Thanks

Works Damn great.

At 30PSI results are -.07*F
At 300PSI results are -.04*F

Code:
float calc_R290_Saturated_Temp(float psi)
{ 
//MMF Model: y=(a*b+c*x^d)/(b+x^d)
//Coefficient Data:
float a = -6.63511955666E+001;
float b =  6.30623048298E+001;
float c = 7.72874234743E+002;
float d = 5.32503085812E-001;
float p;

p = pow(psi,d);

return (((a * b) + (c * p)) / (b + p ));

}
added a fudge factor to get very close:

return (((a * b) + (c * p)) / (b + p ) + .05); //.05 is fudge factor

Last edited by buffalobillpatrick; 02-19-15 at 01:39 PM..
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