HAPropsSI does not converge for T= 299.8 K

[bachc]

Back for more software testing :)

HAPropsSI works great, except for 299.8 K, but works fine for other temperatures.
Version of CoolProp is the current one.

Added printout below, issue seems convergence in CoolProp.cpp.

import CoolProp as CP
CP.version
u'5.1.1'

HAPropsSI('W','T',299.1,'P',101325,'R',0.51)
0.01072579950552751
HAPropsSI('W','T',299.8,'P',101325,'R',0.51)

Traceback (most recent call last):
File "<pyshell#23>", line 1, in
HAPropsSI('W','T',299.8,'P',101325,'R',0.51)
File "CoolProp\HumidAirProp.pyx", line 3, in CoolProp.CoolProp.HAPropsSI (CoolProp\CoolProp.cpp:4112)
File "CoolProp\HumidAirProp.pyx", line 47, in CoolProp.CoolProp.HAPropsSI (CoolProp\CoolProp.cpp:2865)
ValueError: Maxwell solver did not converge after 30 iterations; rhoL: 55317.94333544713 rhoV: 1.404747498588554 error: 3.95539e-009 dvL/vL: -1.07605e-014 dvV/vV: -2.78591e-014 pL: 3495.44 pV: 3495.44
:: inputs were:"W","T",2.9980000000000001e+02,"P",1.0132500000000000e+05,"R",5.1000000000000001e-01

HAPropsSI('W','T',299.9,'P',101325,'R',0.51)
0.011253867557047863
import CoolProp as CP
CP.version
u'5.1.1'

[ibell]

32-bit or 64-bit?

[ibell]

That works fine in C++ on OS X in 64-bit

[ibell]

Works fine for me:

>>> import CoolProp
>>> HA = CoolProp.CoolProp.HAPropsSI
>>> HA("W","T",2.9980000000000001e+02,"P",1.0132500000000000e+05,"R",5.1000000000000001e-01 )
0.011186615660923415

[ibell]

And for me on windows (python 2.7, 64-bit):

>>> import CoolProp
>>> HA = CoolProp.CoolProp.HAPropsSI
>>> HA("W","T",2.9980000000000001e+02,"P",1.0132500000000000e+05,"R",5.1000000000000001e-01 )
0.011186615660678806

[ibell]

Pushed a change - can you please try with the development version? http://www.coolprop.org/coolprop/wrappers/Python/index.html#automatic-installation

[ibell]

I'm thinking this should be fixed. Re-open if that is not the case. Please confirm.

[bachc]

Works perfectly. Thanks for the quick fix!!

Side-note:
On http://www.coolprop.org/coolprop/wrappers/Python/index.html#automatic-installation, you could add '--trusted-host www.coolprop.dreamhosters.com', to the pip command for installing the development version. Otherwise pip just installs the current release.