I should add that the box will have openings so heat will be able to escape and not build up in the interior of the tank. So the only crucial thing is that local boiling close to the heating element is avoided.
Well doing the above calculation I seem to get a convection coefficient value of 6 x 10^4 which is surely way to high? That is doing the calculation exactly as listed above.
I have heard of power density before, and presumably I would obtain this by just rearranging the above equation to...
Hi everyone. I am not sure if this is the best place for this question but here it goes.
I am looking to build a small heating element to position in the base of a tank of water. I want to avoid any boiling of the water so want to keep the temperature of the wire at around 90 degrees C. The...
Hi everybody. I have been doing some experimental heat loss calculations on a sealed cube of fluid, filling the volume of the cube with hot water then sitting it in a larger tank of fluid at a fixed cooler temperature and monitoring the drop of temperature inside the box. I have also positioned...
Just from thinking about it all logically I assume that I am correct in my thinking in terms of equating the relevant fluxes, it also seems to match up to some data I have so hopefully it is correct. Thanks again for the help and feel free to respond if my thinking is definitely not correct...
Thanks for taking the time to reply. Sorry I know it was a little bit hard to understand as written. The system ends up in a steady state with a layer of hot air sitting on a layer of cool air, so the box has a simple two layer stratification. The flow in the box gets to the steady state by a...
Hi all,
I have a system which involves a ventilated box with a heat source located inside, if the heat source inside is say 1KW and I know it eventually reaches a steady state, in an ideal world it would reach this steady state by effectively ventilating 1KW of heat through the opening and...