Psychrometrics: The volumetric flow rate of a humid air mixture MAY change between a State1 and State2 (but the mass flow rate of dry air does not under steady state)! This is sometimes "glossed over" in some online calculators and less formal guides.

Under steady state with constant mass flow rate of the dry air component, the volumetric flow rate of a humid air mixture MAY change between a State1 and State2. Some special processes may follow a specific volume per dry air isoline (sometimes shown Psychrometrics charts), but in general it may vary.

This is sometimes "glossed over" in some online calculators and less formal guides. More specifically, it is not always stated whether a given volumetric "air flow rate" refers to the entry air flow rate at initial State1:

Visit also: Psychrometrics: Calculations of the mass flow rate of the dry air component (assumed constant under steady state) from the ENTRY volumetric flow rate of the humid air mixture MUST use the INITIAL state variables!

Relates to

Example 07: Sensible cooling: 'qDotSen' (-ve): energy transfer rate FROM humid air

Example 08a: Humidification: Drying lumber with air: required volumetric air flow rate

Example 11: Total (qDotTot), sensible (qDotSen), and latent cooling (qDotLat) required for cooling air

SysML4Mathematica: Example 08a: Humidification: Drying lumber with air: required volumetric air flow rate

SysML4Mathematica: Example 11 [B]: Total (qDotTot), sensible (qDotSen), and latent cooling (qDotLat) required for cooling air: Using Webel MPsy objects and SysML Activity Diagrams

Psychrometrics links (references and online calculators)

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