Homemade Radiator?

Cyclist77 · November 20

So I have this length of fin tubing and had the crazy idea of using some fittings to make a shorter "back&forth" radiator.

What do think?

ScottSecor · November 20

Not a crazy idea at all. Some commercial hot water baseboard contains one, two or three rows of element (pipe with fins).

Cyclist77 · November 24

So I took a few moments to see if the fins would come off. But they seem very fragile. Any ideas on how to remove them.

mattmia2 · November 24

what are you trying to do? cut it where you want to join to it and slip enough fins off the cut ends to put fittings on it. you can also cut some of the fins off with snips first where you want to cut it. a fine hacksaw works better than a tubing cutter because the tubing cutter will really crimp the end of the thin tubing down.

note that in most versions of fin tube that tubing is much thinner than the pipe you would buy if you were choosing it which is ok if you're soldering to it, just note that it is like you're working with a tube of heavy duty reynold's wrap only it is copper.

the output of the stacked elements will be significantly less than if they were linear because the incoming air to the top element will be much warmer and the output is a function of the difference between the air temp and the water temp.

Big Ed_4 · November 24

I would recommend spending a couple of bucks and buy a small panel radiator. Just saying

Cyclist77 · November 25

Ed, you are probably right! Sometimes I'm too frugal! 😄😄😄

EdTheHeaterMan · November 28

This will provide more heat per foot of element

Then this design

because the temperature entering the three rows of element in the top illustration is the same room temperature for all three pieces of element so the ∆T of all three is over 100° so they will transfer the same amount of heat to the entering air.

In the bottom illustration the first row of element will transfer the most heat because the ∆T of the room temperature is about 100° different. The middle row of element entering air temperature is higher so the ∆T is less so the heat transfer will be less. The top row will give off the least amount of heat to the air since the entering air will be hotter than the previous two elements below . The net result is the exiting air may be a little hotter but not enough hotter to distribute more actual BTUs of energy into the room.

Homemade Radiator?

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