This discussion revolves around the thermodynamics of resistive heating at low power within a thermally sealed chamber. Participants explore whether a resistive wire can achieve high temperatures when powered at low wattage over extended periods, considering factors such as heat loss and thermal resistance.
Participants do not reach a consensus; multiple competing views remain regarding the feasibility of achieving high temperatures at low power and the implications of thermal resistance and heat loss.
Participants highlight various assumptions, such as the effectiveness of insulation, the characteristics of different heating elements, and the practical limitations of heat storage materials. There are unresolved questions about the real-world applicability of the discussed scenarios.
This discussion may be of interest to those exploring thermodynamics, resistive heating applications, thermal energy storage concepts, and the practical implications of heating element design.
Of course there would have to be some sort of safety screen covering the opening just like in a resistive element space heater. Good idea about the Dewar.hmmm27 said:Bucket o' Magma. I wonder how much a paint-can sized Dewar would cost.
A ~9cm dia opening should radiate 1kw @ 1,000C
The power radiated goes like T to the fourth power, T being.the absolute temperature. To me, this implies that you need to multiply the delta T (between the wire and its environment) by only the quartic root of 10 if you want to x10 the power emitted, i.e. 1.78, roughly. What am I missing?Baluncore said:To radiate 10 times the heat, will require 10 times the area, or 10 times the temperature difference, or a blend of those two. The product of element area by temperature difference will be proportional to the power.
I don't know.fluidistic said:What am I missing?