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2

# Specific Heat Capacity

3 replies to this topic
|

### #1 ChrisHughes

ChrisHughes

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Posted 26 October 2019 - 10:54 AM

Hello,

We have calculated heat transfer for both the heating and process fluid, the heat loss in the system, and the heat flux. However, we have used the specific heat values as interpolated from steam tables which is linear. I have been asked to calculate them from the actual data we have but I am not sure what to do to get the values.

I have attached the data we have and would appreciate some help.

Chris

### #2 breizh

breizh

Gold Member

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Posted 26 October 2019 - 10:57 PM

Hi ,

We don't know what you expect from us ! We don't do homework but we will support if you explain a little bit .

Provide a sketch with all the references (temperature , pressure , flows ) . Add  your heat and mass balances .

If you write down the equations  you will probably find out the answers.

Good luck.

Breizh

### #3 ChrisHughes

ChrisHughes

Junior Member

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• 12 posts

Posted 27 October 2019 - 09:13 AM

Hi ,

We don't know what you expect from us ! We don't do homework but we will support if you explain a little bit .

Provide a sketch with all the references (temperature , pressure , flows ) . Add  your heat and mass balances .

If you write down the equations  you will probably find out the answers.

Good luck.

Breizh

I am working on a thermosiphon reboiler rig and calculated the heat transfer and heat losses, but used the specific heat values for steam and water from steam tables.

My demonstrator said I should calculate them from the data because there will be a difference compared to assuming linearity, but I don't know how to calculate specific heat from the data I have.

I know the equation is Q = m c delta T, but I have no idea what to use to get to c.

I have calculated everything using linear c, but I have no idea how to get it from data such as that which I have attached in this message.

### #4 breizh

breizh

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Posted 30 October 2019 - 12:07 AM

Hi ,