flat plate exchangers

Re: flat plate exchangers

There is a flat plate dividing the container into two chambers. The hot water supply is passed through one side of the chamber, giving up heat to the flat dividing plate, which then heats the separate water supply on the other side of the flat plate. The two waters never come in contact with each other, and the heat is transferred through the flat plate.
More complex and higher efficient models may have several flat plates, creating several chambers, but the basic principal is the same, just that there is a greater surface area through which to transfer the heat. The one in you're link actually has 14 plates, and there is a drawing of one opened up and partly pulled apart here: http://s3.pexsupply.com/manuals/1297373935403/47228_PROD_FILE.pdf

Re: flat plate exchangers

91winsun wrote: »

http://www.pexsupply.com/FlatPlate-FP3X8-14-14-plate-3-4-Thread-8-GPM-Heat-Exchanger-3-x-8-5776000-p

what is the inside design in these??? do the pipes go all the way thru and out and the plates just get hot like a car radiator without getting wet??

What are your questions to help with ?
Solar collection etc.


Stainless is a "buzz" word , Like Pentium (remember them ) I-poo and all the rest marketers speeal ..,,,, It really depends on chemicals & temp.
Potable or not , type of stainless for the chemical's used. Mine are kept at close pressures . less distortion while also having a potable water settling tank to help with oxygen in the DHW side.

Many things to consider. Plus what I C&P below.
Heat Exchanger Sizing

Needed Parameters:

Type of both fluids (water, % antifreeze mix with type of glycol used, etc..)

Flow rate of both fluids

Inlet temperature of both fluids

Max pressure drop for both fluids (default is 7 psi if not provided)

1 of 3 Needed Parameters

Outlet temperature of hot fluid

Outlet temperature of cold fluid

Heat transfer desired (Btu/hour)
The more length the heat exchanger has, the more efficiency in heat transfer it has. An infinitely long heat exchanger would allow for the hot fluid to become the temperature of the cold fluid and the cold fluid the hot fluid, assuming perfect energy balance.

The more plates and more width the heat exchanger has, the less pressure loss to the fluids flowing through. While adding more plates and width may increase some heat transfer, it is best to add more length for optimal heat transfer gain. More plates and width should be considered when flow rates reach half or more the max flow rate for the particular unit to avoid pressure loss in the fluid flow. Pressure loss means a slower flowing liquid and therefore, less heat transfer overall. In designs, we typically allow up to a 7.5 psi pressure drop, which is generally accepted as non-interfering with flow rates in a heat transfer application. Most low flow applications experience less than 1 psi drop.


VT