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# Latent Heat For Multi Component Mixture

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6 replies to this topic
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### #1 rajprocess

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....

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

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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....

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