Splined Output Doubt

[delta-pi-1701]

import CoolProp as CP
HEOS = CP.AbstractState("HEOS", "Water")

HEOS.update(CP.HmassP_INPUTS , 1100e3, 3e6)
print(HEOS.Q())
print(HEOS.first_two_phase_deriv(CP.iDmass, CP.iP, CP.iHmass))
print(HEOS.first_two_phase_deriv_splined(CP.iDmass, CP.iP, CP.iHmass,0.03))

0.05106694516062975
0.00019860467815446722
-0.003595560998983705

I guess the derivative splined output may not valid beyond the x_end range and thus can be -1 to avoid confusion.

[ibell]

Would be better to either
a) error
b) fall back to first_two_phase_deriv

I'm leaning towards a)

On Tue, Apr 21, 2015 at 9:17 AM, Paul D notifications@github.com wrote:

import CoolProp as CP
HEOS = CP.AbstractState("HEOS", "Water")

HEOS.update(CP.HmassP_INPUTS , 1100e3, 3e6)print(HEOS.Q())print(HEOS.first_two_phase_deriv(CP.iDmass, CP.iP, CP.iHmass))print(HEOS.first_two_phase_deriv_splined(CP.iDmass, CP.iP, CP.iHmass,0.03))

0.05106694516062975
0.00019860467815446722
-0.003595560998983705

I guess the derivative splined output may not valid beyond the x_end range
and thus can be -1 to avoid confusion.

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