The performance of the plenum vaporizer depends extensively on the saturated vapour pressure of the volatile agent.
2.
A typical volatile agent, isoflurane, has a saturated vapour pressure of 32kPa ( about 1 / 3 of an atmosphere ).
3.
Saturated vapour pressure for any one agent varies with temperature, and plenum vaporizers are designed to operate within a specific temperature range.
4.
Relative humidity : The relative humidity of air is defined as the partial pressure of water vapour divided by the saturated vapour pressure at the same temperature and total pressure ( Siau, 1984 ).
5.
In Mason's formulation the changes in temperature across the boundary layer can be related to the changes in saturated vapour pressure by the Clausius Clapeyron relation; the two energy transport terms must be nearly equal but opposite in sign and so this sets the interface temperature of the drop.
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