Add partial pressure of water as an output in HAPropsSI

[pmanach]

Add:

• P_WS : water saturation pressure
• P_W : water pressure
  as Input of Coolprop.

[ibell]

You mean P_W as an output, right? I don't think it makes sense to use it
as an input.

On Mon, Feb 23, 2015 at 12:09 AM, pmanach notifications@github.com wrote:

Add:

• P_WS : water saturation pressure
• P_W : water pressure as Input of Coolprop.

—
Reply to this email directly or view it on GitHub
#490.

[pmanach]

Hello Ian,
Yes of Course, only INPUT.
I propose to help you to debug the HAPROPSI function : I've again seen some troubles...
Could you explain me how work your solvers ?

[ibell]

Have you looked at the C++ code:
https://github.com/CoolProp/CoolProp/blob/master/src/HumidAirProp.cpp ?

Basically we take any inputs, and convert to Temperature, pressure, and
water mole fraction.

And then all outputs can be obtained as a function of Temperature,
pressure, and water mole fraction

On Wed, Feb 25, 2015 at 1:23 PM, pmanach notifications@github.com wrote:

Hello Ian,
Yes of Course, only INPUT.
I propose to help you to debug the HAPROPSI function : I've again seen
some troubles...
Could you explain me how work your solvers ?

—
Reply to this email directly or view it on GitHub
#490 (comment).

[ibell]

Can you please clarify this issue? I am prepared to implement it, but I want to make sure we are talking about the same things.

If I understand correctly, you would like two features added as output-only parameters

• The pressure of pure(!) water (not including the enhancement factor), p_ws, or as sometimes referred to, p_w0. This is the same value as could be obtained from PropsSI("P","T",298.15,"Q",0,"Water") for instance. Thus I am not sure it is worth it to implement it in HAPropsSI
• Water partial pressure, which is given by the enhancement factor times the water-alone pressure p_w0 - this definitely should be implemented in HAPropsSI

[pmanach]

Hello Ian,
What I asked is only the water partial pressure in air and the water partial pressure in air at saturation (R=1).
Sincerely,PY MANACH
Date: Wed, 11 Mar 2015 18:49:43 -0700
From: notifications@github.com
To: CoolProp@noreply.github.com
CC: pierreyvesmanach@hotmail.com
Subject: Re: [CoolProp] Add P_WS & P_W in HapropsSI Function (#490)

Can you please clarify this issue? I am prepared to implement it, but I want to make sure we are talking about the same things.

If I understand correctly, you would like two features added as output-only parameters

The pressure of pure(!) water (not including the enhancement factor), p_ws, or as sometimes referred to, p_w0. This is the same value as could be obtained from PropsSI("P","T",298.15,"Q",0,"Water") for instance. Thus I am not sure it is worth it to implement it in HAPropsSI
Water partial pressure, which is given by the enhancement factor times the water-alone pressure p_w0 - this definitely should be implemented in HAPropsSI

—
Reply to this email directly or view it on GitHub.

[ibell]

Ok, I think it only makes sense to calculate the partial pressure of water,
and if you want it at saturation, you just do:

PP_ws = HAPropsSI("PP_w","P",101325,"R",1,"T",298)

That should be easy to implement

On Thu, Mar 12, 2015 at 3:12 AM, pmanach notifications@github.com wrote:

Hello Ian,
What I asked is only the water partial pressure in air and the water
partial pressure in air at saturation (R=1).
Sincerely,PY MANACH
Date: Wed, 11 Mar 2015 18:49:43 -0700
From: notifications@github.com
To: CoolProp@noreply.github.com
CC: pierreyvesmanach@hotmail.com
Subject: Re: [CoolProp] Add P_WS & P_W in HapropsSI Function (#490)

Can you please clarify this issue? I am prepared to implement it, but I
want to make sure we are talking about the same things.

If I understand correctly, you would like two features added as
output-only parameters

The pressure of pure(!) water (not including the enhancement factor),
p_ws, or as sometimes referred to, p_w0. This is the same value as could be
obtained from PropsSI("P","T",298.15,"Q",0,"Water") for instance. Thus I am
not sure it is worth it to implement it in HAPropsSI
Water partial pressure, which is given by the enhancement factor times the
water-alone pressure p_w0 - this definitely should be implemented in
HAPropsSI

—
Reply to this email directly or view it on GitHub.

—
Reply to this email directly or view it on GitHub
#490 (comment).