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low loss header
Couderay
Member Posts: 314
Was wanting to build a low loss header for my boiler,does the header need internal baffles for it to work properly.
0
Comments
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It depends...
Sometimes it makes for good marketing. ;-)0 -
LLH
I tend to think no. Though if you have an automatic air vent in the top I could see a baffle helping air removal. Viessmann offsets their ports instead of a baffle. Caleffi uses a baffle instead of offsetting their ports. If you are zone pumping, I would offset the ports by one pipe diameter. If you are using zone valves, it makes less difference.
-Andrew0 -
From an engineering standpoint
You are looking at a "direct contact" heat exchanger. They work best if you do something to create a mixing environment. While their are a variety of solutions... If you want a short Low Loss Header you can either use baffles or offset nozzles to create a mixing environment.
So pick your poisen as it best matches your situation.
Best of luck.
One question to consider - can you really build one cheaper than you can buy one - when you consider time and materials? The Viesmann one comes with all the ports, a temperature sensor port, vent port, drain port, and you can even get an insulation package.
Perry0 -
Offset or
some sort of screen. I like the Caleffi approch with a perforated metal screen, it creates a good mixing mechanism as well as aiding in air seperation. Plus some ability to catch and drop dirt or debris out of the flow.
I also like the nice preformed insulation jacket for the Caleffi Hydro Seperators, and it is now available with sweat unions.
I'd think ports directly across from one another, without a baffle, would be least desireable.
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