does anyone know how to calculate ideal gas heat capacity in aspen plus?
i will be grateful if u reply..............it is urgent.
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Estimating Ideal Gas Heat Capacity Is Aspen Plus
Started by rashed, Mar 31 2008 08:58 AM
3 replies to this topic
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#1
Posted 31 March 2008 - 08:58 AM
#2
Posted 31 March 2008 - 09:41 AM
Rashed,
I'm not sure about AspenPlus, but you can use weighted average heat capacity of components present in the mixture - calculated by the following formula:
Cp = w1.Cp1 + w2.Cp2 + ... + wn.Cpn = SUM(wi.Cpi), where:
wi - weight fraction of component
Cpi - mass heat capacity of component
If you are dealing with small number of components, the calculation is straightforward and the references can be found in any engineering handbook (probably on the internet as well). If the number of components is huge, focus your calculation efforts on those components having the highest weight content in the overall mixture. This is an easy task.
Best regards,
I'm not sure about AspenPlus, but you can use weighted average heat capacity of components present in the mixture - calculated by the following formula:
Cp = w1.Cp1 + w2.Cp2 + ... + wn.Cpn = SUM(wi.Cpi), where:
wi - weight fraction of component
Cpi - mass heat capacity of component
If you are dealing with small number of components, the calculation is straightforward and the references can be found in any engineering handbook (probably on the internet as well). If the number of components is huge, focus your calculation efforts on those components having the highest weight content in the overall mixture. This is an easy task.
Best regards,
#3
Posted 02 April 2008 - 10:05 AM
thanks for ur reply.............but the problem is little bit different here. i need the values of Cp at
1700c-2000c for some components. but i cann't find the values of Cp at those temperature range in any of the chemical engineering handbook.
so...........if you know or anyone knows how to find values of Cp at those temperature range....plz inform me.
my design calculation has stopped for these data.
1700c-2000c for some components. but i cann't find the values of Cp at those temperature range in any of the chemical engineering handbook.
so...........if you know or anyone knows how to find values of Cp at those temperature range....plz inform me.
my design calculation has stopped for these data.
#4
Posted 02 April 2008 - 12:29 PM
Rashed,
What is the composition of your stream, and what is the pressure range we are talking about? Please update your post with required data.
What is the composition of your stream, and what is the pressure range we are talking about? Please update your post with required data.
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