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Latent Heat For Multi Component Mixture


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#1 rajprocess

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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



#2 PaoloPemi

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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.



#3 rajprocess

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Posted 05 October 2013 - 12:13 PM

thankyou paolo...

i will go with SUM(xi*hvi)



#4 abbasek23

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Posted 06 May 2014 - 07:02 PM

is hysys use DIPPR Equations



#5 Padmakar Katre

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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.



#6 hakeemniyas

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Posted 19 November 2014 - 09:35 PM

Whether this will be applicable to both latent heat of fusion & evaporation?



#7 serra

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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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