4 replies to this topic

[sunil bendi]

How to calculate thermic fluid flow rate ,ie heating hydrocarbon fluid from 150 to 210 deg c in pre heater .

 

Actually i want to give specification to vendor for a control valve .

 

control valve is in thermic fluid line ie going to preheater where hydrocarbon is heating from 150 to 210 deg c using thermic fluid .

 

 

what data required and how flow rate of thermic fluid is caluculated for required heating of hydrocarbon from 150 to 210 deg c

[ankur2061]

sunil,

 

This is a simple heat balance calculation (Q= m*Cp*deltaT). However, a lot of data is missing from your side. Some of the data required is:

 

1. Mass flow of hydrocarbon

2. Avg specific heat of hydrocarbon @ ((150+210) / 2) deg C

3. Supply temperature of thermic fluid

4. Return temperature of thermic fluid

5. Specific heat of thermic fluid @arithmetic avg of supply / return temperature

 

Once you have all this data, the heat balance equation will give you the mass flow of thermic fluid.

 

Regards,

Ankur.

[sunil bendi]

Thank you sir 

 

 

1. Mass flow of hydrocarbon   --   6400 kg /hr

2. Avg specific heat of hydrocarbon @ ((150+210) / 2) deg C -- 0.42 kcal/kg 0c

3. Supply temperature of thermic fluid-- 282   0c 

4. Return temperature of thermic fluid ---  272   0c 

5. Specific heat of thermic fluid @arithmetic avg of supply / return temperature --  0.71  kcal/kg  0c 

 

 

i caluculated i got  thermic fluid flow rate as 39 m3/hr.

 

But i guessed density of servotherm super oil  , i didnt got real value from data

 

Thanks sir

 

Thanks

[breizh]

Hi,

Another brand which is close to your working condition . You may compare the data on your hands with those I attached .

 

Good luck

 

Breizh

[sunil bendi]

thank u sir