Total Pressure Of Moist Air Given Degree Of Saturation Calculator

Formula Used:

\[ p_t = \frac{(S - 1) \times p_s \times p_v}{S \times p_s - p_v} \]

Degree of Saturation (S):

Partial Pressure of Water Vapour in Saturated Air (pₛ):

Pressure of Water Vapor (pᵥ):

Total Pressure of Moist Air (pₜ):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Total Pressure of Moist Air?

Total Pressure of Moist Air is the pressure exerted by the mixture of air and water vapour which is equal to the sum of the respected pressures. It is also called barometric pressure.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ p_t = \frac{(S - 1) \times p_s \times p_v}{S \times p_s - p_v} \]

Where:

\( p_t \) — Total Pressure of Moist Air (Pa)
\( S \) — Degree of saturation (ratio of volume of water to volume of voids)
\( p_s \) — Partial pressure of water vapour in saturated air (Pa)
\( p_v \) — Pressure of water vapor (Pa)

Explanation: This formula calculates the total pressure of moist air based on the degree of saturation and partial pressures of water vapor components.

3. Importance of Total Pressure Calculation

Details: Accurate calculation of total pressure is crucial for HVAC systems design, meteorological studies, and various industrial processes involving air-water vapor mixtures.

4. Using the Calculator

Tips: Enter degree of saturation (dimensionless), partial pressure of water vapour in saturated air (Pa), and pressure of water vapor (Pa). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is degree of saturation?
A: Degree of saturation is the ratio of the volume of water to the volume of voids in a soil or air mixture.

Q2: How is partial pressure of water vapour obtained?
A: Partial pressure of water vapour in saturated air is obtained from steam tables corresponding to dry bulb temperature.

Q3: What units should be used for pressure inputs?
A: Pressure values should be entered in Pascals (Pa) for consistent results.

Q4: When might this calculation be undefined?
A: The calculation becomes undefined when the denominator (S×pₛ - pᵥ) equals zero, which should be avoided in practical applications.

Q5: What are typical applications of this calculation?
A: This calculation is used in psychrometrics, HVAC system design, weather forecasting, and industrial drying processes.