wirebender
Senior Member
wirebender thinks computers are cooled by radiation rather than conduction and convection.
Ian, it doesn't matter whether the means of moving the heat is radiation, convection, or conduction, the laws of nature still apply. Whether it is in a vaccum or not doesn't allow it to break the 2nd law of thermodynamics. Because it is in the open atmosphere, the heat sink and the heat source will never reach equilibrium and become as a single radiating source as would happen in the vaccum of spencer's imagination.
Once more Ian, here is the math that proves you wrong. Do tell exactly what you believe is wrong with it. As you can see, the bottom line is both plates ending up at 53 degrees F; considerably cooler than the plates in spencer's imagination. Which physical law do you believe is being misapplied there, or what mathematical error do you believe has been made. The laws of nature are called the laws of nature for a reason Ian and not the laws of systems, or laws of vacuum vs laws of open space. You can not break the laws of nature and create energy simply because you suck all the air out of a chamber. If you could, our energy woes would be a thing of the past.
You have been willingly duped because your faith is stronger than your analytical mind. You want to believe that bar will get warmer because you are emotionally attached to the idea that CO2 can somehow cause the atmosphere to heat up. Give up the belief that the cooler bar will somehow make the heated bar warmer and you have to give up your fantasy about CO2.
Re: Vacuum Chamber with plates.
First, identify the ONLY energy source in the Vacuum Chamber with an electric heater.
The ONLY energy source is the ELECTRIC HEATER that heats a plate with electricity to a temperature of 150 deg F or 338.56 K.
Asuume an emissivity = 1 and a surface Area for the plate = 1 m^2
Using the Stefan-Boltzmann Law, the Watts provided by the Electric Heater is:
P = e*BC*A*T^4
Where P = net radiated power (Watts), e = emissivity, BC = Stefan’s constant 5.67 X 10^-8, A = area and T = temperature of radiator in K
P = (5.67X10^-8) X 1m^2 X (338.56 K)^4 = 744.95 Watts
(***That’s ALL the Energy Available and cannot be exceeded without CREATING ENERGY***)
The EM field produced by the plate is 744.95 Watts/ 1 m^2 = 744.95 w/m^2
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If another identical “non-heated” and colder plate is inserted into the Vacuum Chamber next to the heated Plate then:
The 2nd Plate also has an emissivity = 1 and a surface Area for the 2nd plate = 1 m^2
We can easily determine the equilibrium temperature of both plates by using the Stefan-Boltzmann Law and The Law of Conservation of Energy.
The TOTAL amount of energy available is 744.95 Watts and both plates will have the same temperature at equilibrium, so they can be considered to be a single radiating body with double the radiating surface area.
The area of both plates = 2 m^2 so the Radiation emitted by both plates at equilibrium = 744.95 Watts / 2 m^2 = 372.48 w/m^2
And the equilibrium temperature for both plates will be 284.69 K or 53 deg F.
The only way to make that heated bar warmer Ian, is to either pump in more electricity through the wire or to make it smaller so that its radiating surface is smaller. Placing a heat sink next to it serves to increase the radiating surface thus bleeding heat off faster and making it cooler. You can't increase the amount of energy in the system by increasing the radiating surface; that only serves to make the system cooler and it doesn't matter a whit whether it is happening in the open atmosphere or in a vaccum chamber.
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