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Change PCV settings from fraction to percent

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This commit is contained in:
Lew Rossman
2023-08-17 14:54:59 -04:00
parent 4577af9b19
commit 6aa2a21327
4 changed files with 17 additions and 12 deletions
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15
src/hydcoeffs.c
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@@ -161,10 +161,10 @@ double pcvlosscoeff(Project* pr, int k, double s)
/*
**--------------------------------------------------------------
** Input: k = link index
** s = valve fraction open setting
** s = valve percent open setting
** Output: returns a valve loss coefficient
** Purpose: finds a Positional Control Valve's loss
** coefficient from its fraction open setting.
** coefficient from its percent open setting.
**--------------------------------------------------------------
*/
{
@@ -176,7 +176,7 @@ double pcvlosscoeff(Project* pr, int k, double s)
double kmo; // fully open loss coeff.
double km; // partly open loss coeff.
double kvr; // Kv / Kvo (Kvo = Kv at fully open)
double *x, *y; // points on kvr v. frac. open curve
double *x, *y; // points on kvr v. percent open curve
int k1, k2, npts;
Scurve *curve;
@@ -186,7 +186,7 @@ double pcvlosscoeff(Project* pr, int k, double s)
// Valve is completely open so return its Km value
d = net->Link[k].Diam;
kmo = net->Link[k].Km;
if (s >= 1.0) return kmo;
if (s >= 100.0) return kmo;
// Valve is completely closed so return a large coeff.
if (s <= 0.0) return CBIG;
@@ -199,8 +199,8 @@ double pcvlosscoeff(Project* pr, int k, double s)
// Valve curve data
curve = &net->Curve[c];
npts = curve->Npts;
x = curve->X; // x = frac. open
y = curve->Y; // y = Kv / Kvo
x = curve->X; // x = % open
y = curve->Y; // y = Kv / Kvo as a %
// s lies below first point of curve
if (s < x[0])
@@ -226,7 +226,8 @@ double pcvlosscoeff(Project* pr, int k, double s)
}
}
// kvr can't be > 1 or <= 0
// Convert kvr from % to fraction
kvr /= 100.;
kvr = MIN(kvr, 1.0);
kvr = MAX(kvr, CSMALL);