Calculating Glasshouse Heat: A Question from CJ

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To determine the temperature inside a glasshouse, one must analyze the energy dynamics involved. This includes calculating the energy entering the greenhouse from sunlight through the glass roof and the energy exiting due to heat re-radiation, absorption by the ground, and losses through the walls. The equilibrium temperature can be found by solving for the point where incoming energy equals outgoing energy. Additionally, specific software is available that calculates heat flux based on given conditions, which can be adapted to find the temperature at which heat flux reaches zero through trial and error. Understanding the properties of the glass, such as its thermal conductivity, is also essential for accurate calculations.
CyberJay
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Hi
Can anybody tell me if there is a way to work out how hot it gets in a glasshouse?
I realize it would depend on the properties of the glass but I don't know that either. Which properties do what?
thanks guys
CJ
 
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Find the energy going into the greenhouse -- i.e., from sunlight through the glass roof.

Find the amount of energy that leaves the greenhouse as a function of temperature -- i.e. from heat rerediated through the glass, and absorbed by the earth, and lost through the walls.

Solve for the temperature that makes them equal.

- Warren
 
I use THIS software. It does the opposite of what you are asking: it calculates the heat flux for a given set of conditions. It wouldn't be too tough to use trial and error to find the temperature at which the heat flux is zero.
 

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