jjgomera/iapws

AttributeError: 'IAPWS97' object has no attribute 'T'

Closed this issue · 3 comments

twegner23 commented 
116 P = [P0]*N
117 P_last = [0]*N
118 Tf = [T0]*N
119 x_last = 0
120 h = prop(P=P0/(10**6),T=T0).h*1000
121 
122 for n in range(N-1):
123         while(P[n] - P_last[n] > tol):
124                 P_last[n] = P[n]
125                 if (Tf[n] <= prop(P=P[n]/(10**6),x=0).T):
126                         x = 0
127                 else:
128                         x = Quality(h,P[n]/(10**6))
129                 P[n+1] = Pressure(P[n]/(10**6),x,x_last,Tf[n])
130                 h = enthalpy(n+1)
131                 Tf[n+1] = prop(P=P[n+1]/(10**6),h=h).T 
132                 x_last = x

Earlier in the Code I have:
from iapws import IAPWS97 as prop

Hi, I'm trying to use IAPWS97 package, but it keeps giving me this attribute error function. Another person had a similar issue but the poblem here isn't being in the mixed region. When I used iapws on its own outside my code, it works fine in any region. But in my code (This is only a small portion) I get this attribute error with any property. Sorry about the formatting. I've never used Github before.

jjgomera commented

Be careful with enthalpy units as with pressure, I think you are using J/kg as h input in line 131 so the iapws97 class give out of bound error

prop(P=P[n+1]/(10**6),h=h).msg

twegner23 commented

That fixed it. You're my hero jj. Is there any documentation available to view the units used by the package?