4 replies to this topic

[Sevail]

Dears

 

Usually by increasing temperature (in constant pressure) in fire heater liquid density decreases. But in the case I am working on, the feed is condensate, which will be heated from 200 °C to 320 °C. When pressure is above 5 bar, by increasing temperature the density will increase by 1~3 degrees and then will start to decrease.

I want to know the reason for such a behavior.

 

Thanks in advance.

[Saml]

What is the composition of this condensate that is liquid at 200 °C and 5 bar?

[Sevail]

Dear Saml

 

1) The fluid at 200 °C and 5 bar is two phase.

2) The condensate  contains a range of hydrocarbon (contain LPG and FBP is about 460 °C). This heater is used for heating of condensate before fed to atmospheric tower.

[moeinesmaeili]

If we have one phase & liquid , the density be decrease by temperature increasing (reverse) but if we have gaseous phase density be increase by temperature increasing (direct)

[shvet]

 But in the case I am working on, the feed is condensate, which will be heated from 200 °C to 320 °C. When pressure is above 5 bar, by increasing temperature the density will increase by 1~3 degrees and then will start to decrease.

I want to know the reason for such a behavior.

 

What is a problem? Density if what - liquid, gas of two phase fluid? Please provide us with more information.