On Fri, Jun 24, 2011 at 6:09 AM, Horace Heffner <[email protected]>wrote:
> I wrote: "A couple meters of rubber hose can not radiate away 80% of 12 kW > of heat suggested to be produced in the original runs." > > To be more specific, it can be expected the heat flow through the rubber > tube walls is about 220 W per m of hose. > > Using the thermal conductivity for rubber at about 0.14 W/(m K):... I think the heat dissipated by the hose is limited by losses to the room by convection and radiation, and not by the thermal conductivity of the hose. Losses to the room are much less sensitive to the type of material, and you can look up the amount of heat dissipated in a room from a cast iron radiator at 100C. For the same area as the hose, at 100C, that would be about 150 W.
