I want to calculate required cooling water utility temperature to condense acetic acid at 10 torr. I have boiling point of acetic acid at 760mmHg is 118degc and at 10 torr (-29degc). How can we calculate the utility temp?
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Heat Exchanger Design
#5
Posted 29 May 2023 - 04:27 AM
Hi,
Can you change the pressure on your system to cope with the temperature of the cooling water? The temperature of the process at a given pressure should be the maximum temperature of the cooling water + let say 5 to 7 C.
If not possible, you have to consider investing in a chilled water unit.
When I was in activity, I had a process where we recovered Acetic acid in a still pot under vacuum and the cooling was done using Cooling Water. This was in Thailand where temp in summer is also hot.
Good luck
Breizh
#7
Posted 29 May 2023 - 04:37 AM
sir can all the products having boiling point 88-90 degc at 10 torr gets condensed with chilled water supply like 7-10 degc?
i have gone through your answer about acetic acid. but i don't have the chilled water. I have only cooling water.
if i provide chilled water to products having BP 88-90 degc @ 10 torr, will all get condensed?
#8
Posted 29 May 2023 - 04:51 AM
Hi,
I think you did not get my point, the utility should enter your HX at a temperature below the temperature of the condensed product to avoid temperature cross.
If you have a product with a BP of 88 C @ 10 torrs , you have no issue using cooling water , even in INDIA during summer season .
Good luck
Breizh
#9
Posted 09 June 2023 - 04:41 AM
sir can all the products having boiling point 88-90 degc at 10 torr gets condensed with chilled water supply like 7-10 degc?
i have gone through your answer about acetic acid. but i don't have the chilled water. I have only cooling water.
if i provide chilled water to products having BP 88-90 degc @ 10 torr, will all get condensed?
Any specific reason to maintain 10 torr pressure? if possible, you may decide the pressure value which allows you to condense with available cooling water temperature, or else use chilled water. It's simple.
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