Note:

This tool calculates the Proportion of Vapor (n) in a two-phase discharge scenario. The calculation is based on the enthalpy values before and after the valve and the enthalpy of evaporation.

The proportion of vapor (n) helps determine how much of the fluid has vaporized after passing through a valve or pressure reduction system. This is critical in steam systems, safety valve design, and phase-change processes.

Understanding Parameters:

• Enthalpy of Liquid Before Valve (h_f1) (kJ/kg): The energy content of the liquid before expansion.
• Enthalpy of Liquid After Valve (h_f2) (kJ/kg): The energy content of the liquid after expansion.
• Enthalpy of Evaporation After Valve (h_fg2) (kJ/kg): The energy required to convert the remaining liquid to vapor.

Key Applications:

• Steam and Gas Flow Analysis: Helps in understanding phase change behavior.
• Safety Valve Sizing: Determines the vapor fraction for accurate pressure relief calculations.
• Boiler and Turbine Efficiency: Essential for steam power plants and thermal systems.
• Process Engineering: Important in refrigeration, cryogenics, and industrial gas handling.

Validations & Input Constraints:

• h_f1 must be greater than h_f2: Enthalpy before the valve should be higher than after the valve.
• h_fg2 must be positive: Evaporation enthalpy must be a valid positive number.
• Check for valid n values: n should be between 0 and 1. If outside this range, inputs should be verified.

Conclusion:

This tool aids engineers in determining the proportion of vapor after expansion, ensuring better process control, safety, and efficiency in industrial and energy applications.