Standard EnergyPlus Conditions¶
Standard Temperature and Pressure¶
Several objects specify inputs at "standard temperature and pressure". Standard Temperature is dry air at 20\(^{o}\) C drybulb. The program uses local barometric pressure to account for altitude using the equation for "standard atmospheric" pressure on p 6.1 of the ASHRAE 1997 HOF (SI edition) to initialize the air systems being simulated.
\[Stdpressure = 101325\cdot {\left( {1.0 - Z\cdot {{2.25577}^{ - 5}}} \right)^{5.2559}}\]
where
StdPressure = pressure {Pa}
Z = altitude/elevation {m}