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Hey everybody, no idea if this is the right place for me to post this…
This is the first post I've ever written, in any forum, ever. Complete forum newbie with a complex problem, hence my desperate plea for help on this nexus of knowledge forged through experience that I have yet to gain.
The problem is one of Thermodynamics and is as follows, I have a hot gas contained in a chamber and I only want a set about of energy to escape it. Given the very hot temperature of the gas I will need a few layers of insulation of different properties to try and contain the heat. I have built a tool in excel that uses the Materials properties and dimensions to calculate the heat flow through each layer of insulation, and the temperature at each of these boundaries, taking into account the heat flow from conduction, forced convection and radiation to sum the net heat flow through all layers.
It seems to be a circular problem, in that the heat flow and temperature depend upon each other, something that excel doesn't agree with, so I devised a series of tables in order to de-link their relationship and used the solver function to try and converge to an equilibrium but with no joy. I wonder if my method is fundamentally flawed…
The problem I put forward to the floor is this, If you had to calculate the heat flow and boundary temperatures through multiple layers of materials how would you go about doing it? Any help, even if it is to just point me in the right direction would be appreciated.
Looking forward to a reply.
This is the first post I've ever written, in any forum, ever. Complete forum newbie with a complex problem, hence my desperate plea for help on this nexus of knowledge forged through experience that I have yet to gain.
The problem is one of Thermodynamics and is as follows, I have a hot gas contained in a chamber and I only want a set about of energy to escape it. Given the very hot temperature of the gas I will need a few layers of insulation of different properties to try and contain the heat. I have built a tool in excel that uses the Materials properties and dimensions to calculate the heat flow through each layer of insulation, and the temperature at each of these boundaries, taking into account the heat flow from conduction, forced convection and radiation to sum the net heat flow through all layers.
It seems to be a circular problem, in that the heat flow and temperature depend upon each other, something that excel doesn't agree with, so I devised a series of tables in order to de-link their relationship and used the solver function to try and converge to an equilibrium but with no joy. I wonder if my method is fundamentally flawed…
The problem I put forward to the floor is this, If you had to calculate the heat flow and boundary temperatures through multiple layers of materials how would you go about doing it? Any help, even if it is to just point me in the right direction would be appreciated.
Looking forward to a reply.