3 replies to this topic

[processengeng]

Hi everyone, I have a shell and tube heat exchanger and chilled water ( 10 degC) is used as the cooling medium to cool down the product side. Usually a thermal relief valve is recommended at the cooling water side if the valve is blocked. But for my case, the operation is intermittent ( maybe 2 hours per day). And during operation, operator will be at site to monitor the cooling process. Is it a thermal relief valve can be omitted for this case?

[fallah]

 

processengeng,

 

An operator will be at site 2 hours per day for many days to monitor the cooling process (probably by reading a TG) in order to omit a small TSV (1"*1 1/2")...!

 

No, it cannot be logical. Indeed, the TG may show wrong value due to calibration failure or operator may be absent once the cooling water valve is blocked...

 

Then it's highly recommended to consider a small TSV at the outlet cooling water line...
 

[processengeng]

Dear fallah,
Thanks for your advice. If the chilled water is in shell side and the hot product is in tube side. Is a TRv still required? My product enters the heat exchanger at 45 degC and to be cooled down to 25 degC. Thank you.

[fallah]

Thanks for your advice. If the chilled water is in shell side and the hot product is in tube side. Is a TRv still required? My product enters the heat exchanger at 45 degC and to be cooled down to 25 degC. Thank you.

 

processengeng,

 

It depends; it might the PSV on the shell side which would probably considered the other cases such as fire case, covers the thermal expansion case as well...