4 replies to this topic

[DC10]

Hi,

This is my first post so I hope that I dont confuse you too much.

I have a 2500lt horizontal vessel which  is filled at a rate of approx 40lt/hr with a liquid @ 25 degs C, It has a cooling jacket which is cooled by our chilled water loop @ approx 6 degs C. As far as I know the chilled water flows at approx 1.6m/s.

I would appreciate it if some one could help me with a formula to calculate how long it would take to bring the liquid down to approx 8 degs C.

 

Thanks,

DC

[breizh]

Hi

 

Consider process heat transfer by Kern or Perry chemical engineers handbook to support your query. You may consider the resources in this forum (search function top right).

 

additional resource for this type of application..

 

http://checalc.com/s...jacketHeat.html

 

hope this helps

Breizh

Edited by breizh, 03 October 2013 - 10:34 PM.

[srfish]

I believe you need to set one of the variables of time and heat transfer area of the jacket. If less time is required then more area is needed. The opposite is true.

[curious_cat]

 

As stated, the problem is underdefined. Some variable we need to know:

 

(1) Area of jacket

(2) Specific heat of liquid you are filling

(3) Flow rate of chilled water in L/sec. Velocity is useless unless we know the c/s area where it is reported at.

(4) MOC of vessel, thickness of jacket etc, will also matter. 

[DC10]

 

Hi Breizh, srfish and curious_cat,

 

Thank you all for your answers and I'm sorry for not getting back to you sooner, Some of your answers are still a little high level for me to understand (you must remember this engineering business is new to me).

Some of the info requested ror the vessel is as follows:

 

Vessel Dia = 1m

Vessel Length = 3m

The gacket is approx 50mm around the vessel

The chilled water pipe is approx 25mm dia

The wall thickness of the vessel is 6mm and is constructed with S/S

 

Hope this will help,

 

DC