FieldengThermal & HVAC
Moist-Air Density
ρ = Pd/(Rd T) + Pv/(Rv T) with Rd = 287.05 J/kg·K and Rv = 461.495 J/kg·K.
Thermal & HVAC
ρ = Pd/(Rd T) + Pv/(Rv T) with Rd = 287.05 J/kg·K and Rv = 461.495 J/kg·K.
App id: THERM-14. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
ρ = Pd / (Rd T) + Pv / (Rv T)Inputs
| Name | Unit |
|---|---|
| Dry-bulb temperature (camera) | C |
| Relative humidity | % |
| Absolute pressure (optional) | kPa |
Outputs
| Name | Unit |
|---|---|
| Density (hero result) | kg/m3 |
Diagnose
Observations are context. They do not pass or fail a structure. See Diagnose.
| When | Observation | Severity |
|---|---|---|
RH > 0.7 | High relative humidity | caution |
RH < 0.2 | Low relative humidity | info |
Assumptions
- Leave pressure blank for 101.325 kPa.
Provenance
- Feeds THERM-04 when you do not want the 1.204 kg/m³ default.