- #1
Sravoff
- 15
- 0
Hello, I want to build an electrical circuit powered by a temperature diffence between two unlike couple, such as copper and iron. I know a good thermocouple would be better, but I don't think I'll be able to get a hold of those materials as easily.
My current plan is to use a solar oven to heat up the iron/copper junction, and use evaporation too cool down another section of the circuit in order to maximize the energy difference.
I started thinking about a pressure cooker and thought if I sealed the junction in a metal container full of water, as the temperature increased, so would the pressure, which would also increase the temperature. In this way would the temperature increase more than just linearly? T=at^2 instead of T=at, where T is temp, a is some constant, t is time--time in focus of the paraboloid I am using to focus the sun.
My reasoning was also influenced by this thread, but it doesn't address my question specifically:
https://www.physicsforums.com/archive/index.php/t-39446.html
In order for my reasoning to be sound, in the Ideal Gas Law PV=nRT; P must be a function of T, and T a function of P, which seems very wonky.
However, back to the pressure cooker, they use pressure to increase heat, or at least retain more heat (as opposed to losing heat out the top of a pot with no lid) so there could be a benefit to pressurizing the junction.
What am I looking at here, and what kind of strange made-up alleys am I finding myself in?
Thank you
My current plan is to use a solar oven to heat up the iron/copper junction, and use evaporation too cool down another section of the circuit in order to maximize the energy difference.
I started thinking about a pressure cooker and thought if I sealed the junction in a metal container full of water, as the temperature increased, so would the pressure, which would also increase the temperature. In this way would the temperature increase more than just linearly? T=at^2 instead of T=at, where T is temp, a is some constant, t is time--time in focus of the paraboloid I am using to focus the sun.
My reasoning was also influenced by this thread, but it doesn't address my question specifically:
https://www.physicsforums.com/archive/index.php/t-39446.html
In order for my reasoning to be sound, in the Ideal Gas Law PV=nRT; P must be a function of T, and T a function of P, which seems very wonky.
However, back to the pressure cooker, they use pressure to increase heat, or at least retain more heat (as opposed to losing heat out the top of a pot with no lid) so there could be a benefit to pressurizing the junction.
What am I looking at here, and what kind of strange made-up alleys am I finding myself in?
Thank you