I've just changed a CPU in one of my PCs, and that got me thinking about heatsinks...

I'm wondering whether a large heatsink placed on top of the heat riser barrel, and perhaps bonded with thermal paste, and a fan blowing across it would extract more heat from the gases

I'm thinking I could cast a heatsink [1] the same size as the top of the barrel, with 4" (6"?) ribs and give it a go.

Anyone done anything similar?




[1]or half a dozen smaller ones.

yes/
but you can more easily do a bigger barrel.

shilo kinarty wrote:yes/
but you can more easily do a bigger barrel.

bigger how?

taller, which would affect the gap at the top of the riser?
or wider? which would affect the csa of the exhaust part of the barrel (the outer downdraft part) - assuming the heat riser stays the same diameter.

I'm guessing you mean surface area of the barrel - so either? - in which case it won't work for me as I only have a limited area in which to build the heater part. ie, an area 44in tall x 38in x 36in

Gregg L'Oeuf wrote:I've just changed a CPU in one of my PCs, and that got me thinking about heatsinks...

I'm wondering whether a large heatsink placed on top of the heat riser barrel, and perhaps bonded with thermal paste, and a fan blowing across it would extract more heat from the gases

I'm thinking I could cast a heatsink [1] the same size as the top of the barrel, with 4" (6"?) ribs and give it a go.

Anyone done anything similar?




[1]or half a dozen smaller ones.

It has been done, on any wood stove, and this would be a much easier and effective choice.

Gregg L'Oeuf wrote:

shilo kinarty wrote:yes/
but you can more easily do a bigger barrel.

bigger how?

taller, which would affect the gap at the top of the riser?
or wider? which would affect the csa of the exhaust part of the barrel (the outer downdraft part) - assuming the heat riser stays the same diameter.

both are good to the rocket.