Tip #1 for Plate and Frame Heat Exchangers:
Be sure to communicate all pertinent information regarding your application to APV when you request a quotation.
There are two liquid streams going into and coming out of a heat exchanger. They are referred to as the “hot side” and the “cold side”. As a result, there are four temperatures to consider when sizing the heat exchanger. They are the hot side inlet and outlet and the cold side inlet and outlet temperatures. In order to properly size the heat exchanger, you will need to supply APV with any three of the four temperatures. In addition, there is some other basic data for liquids on both the hot and cold sides that are required when properly sizing a plate and heat frame exchanger. This includes the fluids being used, the viscosity, vapor pressure, thermal conductivity, system pressure, specific gravity, and the allowable pressure drop for the system. APV has a design questionnaire available for you to use when collecting data for a heat exchanger application and would be eager to furnish you with a copy.
Tip #2 for Plate and Frame Heat Exchangers:
Minimize erosion in the port area by lowering nozzle velocities.
A safe rule-of-thumb is to keep port velocity at the heat exchanger to around 20 feet/second. Any increase above this rate could possibly cause premature wear on the ports themselves. In addition, you should always consider port liners, even on water applications. These liners, available in many different alloys, will not only protect the carbon steel head from erosion, but from corrosion as well. For instance, in a sea (salt) water application, it would be common to use a carbon steel frame with titanium port liners and plates. This would ensure that any and all components in contact with the seawater would only be corrosion resistant titanium.
105 Cross Point Parkway
Getzville, NY 14068
Phone: (800) 207-2708
Fax: (716) 692-1715
APV Plate Heat Exchangers for HVAC Applications
January 1, 2010