What type of heat exchangers are most commonly used for a large-scale plant-cooling loop using seawater as the utility?

What type of heat exchangers are most commonly used for a large-scale plant-cooling loop using  seawater as the utility?
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1 Answer

Answer :

Commonly known as a “secondary cooling loop” or SECOOL, a closed loop water system is circulated  through a processing plant near a sea. Process heat is transferred into the closed loop water and then  this water is circulated through heat exchangers to transfer (reject) the heat to seawater. This is a  hallmark plate and frame heat exchanger application. The higher heat transfer coefficients that are  available in plate and frames exchangers (PHEs) will minimize the installed cost because the material of  construction of choice it Grade 1 Titanium (higher U-value means lower area). To combat pluggage the  narrow passages in the exchangers, the seawater is typically run through large automatic backflush  strainers designed especially for seawater. Periodically, these strainers will reverse flow and  “blowdown” debris to clear the strainer. This method has been used for many years with great success.
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