- OWINIT save Register used in C

[owSlave2.git] / stest / fdiff.py

diff --git a/stest/fdiff.py b/stest/fdiff.py
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+++ b/stest/fdiff.py
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+import math
+#Bezeichnungen:
+#r = relative Luftfeuchte
+#T = Temperatur in C
+#TK = Temperatur in Kelvin (TK = T + 273.15)
+#TD = Taupunkttemperatur in C
+#DD = Dampfdruck in hPa
+#SDD = Saettigungsdampfdruck in hPa
+
+#Parameter:
+#a = 7.5, b = 237.3 fuer T >= 0
+#a = 7.6, b = 240.7 fuer T < 0 ueber Wasser (Taupunkt)
+#a = 9.5, b = 265.5 fuer T < 0 ueber Eis (Frostpunkt)
+
+Rs = 8314.3 #J/(kmol*K) (universelle Gaskonstante)
+mw = 18.016 #kg/kmol (Molekulargewicht des Wasserdampfes)
+#AF = absolute Feuchte in g Wasserdampf pro m3 Luft
+
+#Formeln:
+
+#    SDD(T) = 6.1078 * 10^((a*T)/(b+T))
+#    DD(r,T) = r/100 * SDD(T)
+#    r(T,TD) = 100 * SDD(TD) / SDD(T)
+#    TD(r,T) = b*v/(a-v) mit v(r,T) = log10(DD(r,T)/6.1078)
+#    AF(r,TK) = 10^5 * mw/R* * DD(r,T)/TK; AF(TD,TK) = 10^5 * mw/R* * SDD(TD)/TK
+
+
+a=7.5
+b=237.3
+
+#a=r/100.0*SDD(T)/(T+273.15)*mw/Rs*10000
+#r=a*100/(SDD(T)/(T+273.15)*mw/Rs*10000)
+
+def SDD(T):
+       return 6.1078 * 10**((a*T)/(b+T))
+
+#def DD(r,T):
+#      return r/100 * SDD(T)
+
+#def _r(T,TD):
+#      return 100 * SDD(TD) / SDD(T)
+
+#def _v(r,T):
+#      return math.log10(DD(r,T)/6.1078)
+       
+#def TD(r,T):
+#      return b*v/(a-_v(r,T))  
+
+       
+#def AF(r,T):
+#      return 10000 * mw/Rs * DD(r,T)/(T+273.15) #; AF(TD,TK) = 10^5 * mw/R* * SDD(TD)/TK
+
+def AF1(r,T):
+       return r/100.0*SDD(T)/(T+273.15)*mw/Rs*10000
+
+def RF1(a,T):
+       return a*100/(SDD(T)/(T+273.15)*mw/Rs*10000)    
+#print(0.5*SDD(20)/(20+273.15)*mw/Rs*10000)
+d=[]
+for i in range(11):
+       s=""
+       r=[]
+       for j in range(6):
+               r.append((i*10)-RF1(AF1(i*10,j*10),j*10+0.5))
+               s=s+"%0.2f\t" % (r[len(r)-1])
+       print(s)
+       d.append(r)
+       
+for i in range(11):
+       s=""
+       for j in range(5):
+               s=s+"%0.4f\t" % (d[i][j]-d[i][j+1])
+       print(s)
+