Boyle’s Law and Charles' Law may be combined to solve true gas problems and the formula is as follows:
Po x Vo = Pn x Vn
To Tn
To = Old temperature
Tn = New temperature
Po, Vo, and To represent original conditions.
Pn, Vn, and Tn represent new conditions. Absolute values for temperatures and pressure must be used in this equation. A more concrete equation is: PV = WRT. Where P = Pressure in Pounds Per Square Foot abs.
V = Volume in Cubic Feet
R = Gas Constant
W = Weight of Gas in Pounds
T = Absolute Temperature F.
This equation is useful for many pressure-volume problems and its use is easily followed.
R = Gas constant and it must be known for the gas under consideration.
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Basics of Refrigeration