Heat exchange

You have provided insufficient information for an intelligent answer. As usual with such questions, it all depends. How or with what are you going to cool the process water? What is its temperature? How much is available in gpm.

That is the only information Ive got, I have given to you Incoming temperature, fluid flow on outgoing temperature I dont know if you need something more??

Regards

I ve got àn application where a process water comes out from a process tank @176ºF and must be cool down to 75ºF @50 gpm, what kind of heat exchanger do you recommend??

Or any other application

Cross-flow Shell & Tube?

Counter-flow Tube in Tube?

Now all you have to do is figure out the flow rates, temperatures etc. etc. that was indicated in Post #1.

If the process water is in an open system, you can precool the 176 dF to something above ambient wet bulb temperature with an atmospheric cooling tower. This would be free cooling except for the circulating pump. From that point you would need a refrigeration system to cool the water to 76 dF. Anytime the ambient wet bulb temperature is say 10 deg below 76, the cooling tower could produce 76 dF water. Otherwise the tower would cool the water to about 10 deg above ambient wet bulb.

A small chiller would be used to lower the temperature to 76. The size would depend on the smallest reduction available with the cooling tower. If you cannot get below say 86 dF, then the chiller would need to produce - 50gpm x 8.3lbs/gal x (86-76) x 60min/hr = 249,000 BTU/hr or 21 tons.

If the process water is a closed system, then you could use a liquid evaporative cooler in which the process water is circulated through a heat exchanger within a system simular to a cooling tower, in that water is sprayed over the exchanger, to cool the process water. But once again the process water will be cooled down to something above (5-8 deg) ambient wet bulb. From there the water is cooled via a chiller.

This would probably be your most cost effective system.

thank you let me check ut out

The preceeding writers have all hit key points. In all cases you need to know the mass flow rate of the process fluid. There are several proven solutions and countless variations to process cooling. Typically any industrial installation that requires cooling will have installed different utility pipe loops in the facility, i.e, cooling tower water loop for ambient water supply and chilled water loop for lower temperature cooling. If such were your case, then the most efficiente heat exhanger will be a plate heat exchanger.

You miss key data like site conditions, (maximum and minimum temperature, location in order to consider the cooling medium (sea water, air)). the pressure of process water.

good luck