how can we caluculate latent heat for a multi component mixture.....
Is there any soft ware available for getting latent heat for multi component mixture....
please explain in detail..
Thanking you inadvance ,
rajeev
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Posted 05 October 2013 - 06:11 AM
how can we caluculate latent heat for a multi component mixture.....
Is there any soft ware available for getting latent heat for multi component mixture....
please explain in detail..
Thanking you inadvance ,
rajeev
Posted 05 October 2013 - 08:48 AM
you can calculate latent heat as
SUM(xi*hvi)
where xi is weight fraction of component i
and hvi is latent heat of component i
hvi can be found in tables or calculated for example from a specific correlation (see DIPPR)
or by differentiation of a vapor pressure correlation
most simulators calculate latent heat as difference
H(dew point) - H(bubble point)
where a EOS or equivalent model calculates departure (for H) from ideal condition,
for wide boiling mixtures this method returns average values
different from dQ/dw
(where dw is a small fraction of liquid which vaporizes)
to calculate dQ/dw there are different procedures,
for example you can add a little amount of heat,
solve phase equilibria and calculate dQ/dw
from difference in vapor and liquid enthalpies.
You may calculate these values with a simulator,
I use PRODE PROPERTIES but any equivalent
sofware can be useful.
Posted 05 October 2013 - 12:13 PM
thankyou paolo...
i will go with SUM(xi*hvi)
Posted 06 May 2014 - 07:02 PM
is hysys use DIPPR Equations
Posted 09 May 2014 - 01:49 AM
how can we caluculate latent heat for a multi component mixture.....
Is there any soft ware available for getting latent heat for multi component mixture....
please explain in detail..
Thanking you inadvance ,
rajeev
Any commercial simulator will do this for you at given P,T conditions for defined composition.
Posted 19 November 2014 - 09:35 PM
Whether this will be applicable to both latent heat of fusion & evaporation?
Posted 20 November 2014 - 02:52 AM
yes,
if you know the heat of fusion of individual components,
solid models such as those included in Prode Properties
adopt those values (when available).
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