@maverick1 wrote:
I think you made a good choice in saving your money.
The average person would be surprised at how much energy (BTUs) is consumed by a vehicle in air conditioning the interior space (which is essentially a greenhouse) due to the solar load.
The original problem is not unlike taking a small refrigerator and placing it in an oven set on low heat. The refrigerator will run continuously trying to cool it's interior while the oven is not allowing the exterior of the refrigerator to discharge it's heat.
In physics class, problems like this are given to students to solve. The answer is so bad it makes the student think.
@myst4au wrote:
"... taking a small refrigerator and placing it in an oven set on low heat ..."
I had blissfully forgotten the sphere within a sphere (spheres make the problems easier to solve) problems in the thermodynamics portion of college physical chemistry class.
Another "thought" exercise for those of you who are inclined. How big can a hole in a boat be before the boat sinks? The answer is actually highly dependent on how fast you can pump the water out. So, the answer does not depend as much on the hole size, but the bilge pump's pumping capacity. Once the "water in rate" exceeds the "water out rate", sinking will happen eventually. [And yes, if the Titanic had had improbably large capacity bilge pumps, it would not have sunk.]
@maverick1 wrote:
I think you made a good choice in saving your money.
The average person would be surprised at how much energy (BTUs) is consumed by a vehicle in air conditioning the interior space (which is essentially a greenhouse) due to the solar load.
The original problem is not unlike taking a small refrigerator and placing it in an oven set on low heat. The refrigerator will run continuously trying to cool it's interior while the oven is not allowing the exterior of the refrigerator to discharge it's heat.
In physics class, problems like this are given to students to solve. The answer is so bad it makes the student think.
@maverick1 wrote:
@myst4au wrote:
"... taking a small refrigerator and placing it in an oven set on low heat ..."
I had blissfully forgotten the sphere within a sphere (spheres make the problems easier to solve) problems in the thermodynamics portion of college physical chemistry class.
Another "thought" exercise for those of you who are inclined. How big can a hole in a boat be before the boat sinks? The answer is actually highly dependent on how fast you can pump the water out. So, the answer does not depend as much on the hole size, but the bilge pump's pumping capacity. Once the "water in rate" exceeds the "water out rate", sinking will happen eventually. [And yes, if the Titanic had had improbably large capacity bilge pumps, it would not have sunk.]
@maverick1 wrote:
I think you made a good choice in saving your money.
The average person would be surprised at how much energy (BTUs) is consumed by a vehicle in air conditioning the interior space (which is essentially a greenhouse) due to the solar load.
The original problem is not unlike taking a small refrigerator and placing it in an oven set on low heat. The refrigerator will run continuously trying to cool it's interior while the oven is not allowing the exterior of the refrigerator to discharge it's heat.
In physics class, problems like this are given to students to solve. The answer is so bad it makes the student think.
myst4au, I thought you'd ask the adiabatic question...
What would happen to the temperature of an adiabatic room if you place a refrigerator inside the room and open the refrigerator door?
a) the temperature of the room decreases
b) the temperature of the room increases
c) the temperature of the room stays the same