What is the best form of residue heat exchanger

Metal powder is different, it is not the same, the same answer

What type of material do you mean by the residual night

I suggest mixing

I suggest that you start a heat exchanger on the platform inquiry, so that you can give you a lot of choice

The problem is not clear, what is the first residue, the residue needs to be heating, cooling or gasification? , the temperature from how much to how much? On the other side of the medium is what, the desired temperature range is how much? Only these conditions made it clear that the selection of a good.