freetown fred wrote:BUT--how do they do if you lose power? That would be my big concern with that set up. Fellow FORUM member Oliver Power is working on that idea on a HITZER 50-93 or 30-95 with purely radiation.
That'll be interesting to see the results.
I thought of enclosing the heatsinks to box them and create convection like a baseboard radiator, but I had to mount mine horizontally on the side to please my roommate. Hence the muffin fans to move air.
After calculating the surface area of the fins, anywhere they are mounted (the footprint size) I now have 4 times the surface area of that footprint available to radiate. Even without power and fans, I'm that much better off than without them I feel.
With my IR gun, the base of the heatsinks are the same temp as the side right above and below the mountings, and the temp drops 15 degrees at the tip of the fins with the muffin fans removed. (I believe this is heat given up to the room)
When the muffin fans are on and running at medium speed, the temp drops about 40-50 degrees in a spread outward from the airflow (left and right of the fan).
I've done a bunch of airflow checks with toilet paper taped in different areas. It all turned out logically like I expected. No surprises, exiting air under the cover relative to fan speed. Also some movement with natural convection at the front with fans off.
At bedtime I crank up the variac to 3/4 speed, and I can feel hot air coming out under the top cover in front about 4 feet away.
We were without power for 6 days last year, I heated the whole house and we cooked on it albeit slowly.
Any questions I'd be more than glad to help this effort.