I would like to be able to see the equations which are involved. Enthalpy
balance and heat of evaporation, gas law etc..
jd
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of David Gregory
Sent: zondag 9 augustus 2015 0:26
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: CO2
On Sat, Aug 8, 2015 at 2:10 PM, John Dom <johndom@xxxxxxxxx> wrote:
H = m*Cp*T
A simplification that even in the age before Webbook/REFPROP had to be used
judiciously. Did you try what i suggested? Or would you like me to just
give you the answer?
http://www.amazon.com/Fundamentals-Engineering-Thermodynamics-Michael-Moran/dp/0470917687
T initial and T final of the expansion cooling are not the same only m is.
Isenthalpic?
Jd
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of David Gregory
Sent: zaterdag 8 augustus 2015 16:29
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: CO2
The process is isenthalpic, so you know the final enthalpy and density. Look
up P and T on the NIST webbook.
On Fri, Aug 7, 2015 at 10:11 AM, John Dom <johndom@xxxxxxxxx> wrote:
· If I flash expand the 8 g liquid/gaseous CO2 in an evacuated 1 L
bottle by puncturing the cartridge (cartridge and bottle at 20°C prior to the
expansion) what will the gas temperature and pressure be in the bottle?
· If I flash expand the 8 g of CO2 in a cartridge in 1 L of water
(cartridge and water at 20°C prior to expansion) in a 1.2 L bottle, how much
will the 1 L water (now soda) temperature drop in °C immediately after?
Next, what will the ullage gas CO2 pressure be immediately after and after it
heating up to 20°C again?
My 3rd question depends on the response I get.
Thanks,
jd