Note:

Dalton's Law of Partial Pressures states that the total pressure exerted by a mixture of gases is the sum of the partial pressures of each individual gas in the mixture.

In this calculator, we determine the Effective Steam Pressure using the formula:

What Inputs to Use?

• Proportion of Steam: The fraction of steam in the total gas mixture (e.g., 0.5 if steam makes up 50% of the mixture).
• Indicated Pressure (bar absolute): The total pressure of the gas mixture, measured in bar(a) (e.g., 2.5 bar(a)).

The Proportion of Steam should be entered as a fraction between 0 and 1 (e.g., 0.7 for 70% steam).

The Indicated Pressure should be entered in bar absolute (bar a), meaning it includes atmospheric pressure.

Real-Time Example Calculation:

Imagine a chemical plant using a boiler to generate steam for various processes. A sensor measures the total pressure inside the steam line (which contains a mixture of steam and other gases) and reads 4.5 bar(a). This is the Indicated Pressure.

The plant operator knows that the mixture in the line is composed of approximately 70% steam and 30% other gases due to a small leak in the system. Therefore, the Proportion of Steam is 0.7.

This real-time calculation is crucial for the plant operator. Knowing the effective steam pressure allows them to:

• Monitor Boiler Efficiency: A lower than expected effective steam pressure could indicate a problem with the boiler's operation.
• Ensure Process Consistency: Many chemical processes require a specific steam pressure to function correctly.
• Maintain Safety: Accurate pressure readings are essential for preventing dangerous overpressure situations.

This calculation helps in industrial applications where steam pressure needs to be monitored for efficiency and safety.