1. What is Enthalpy?

Enthalpy (H) is a thermodynamic property that represents the total heat content of a system. In steam systems, it's crucial for energy balance calculations and is typically measured in kJ/kg.

2. How Does the Calculator Work?

The calculator uses TLV steam tables to determine enthalpy based on:

Where:

• \( H \) — Enthalpy (kJ/kg)
• \( T \) — Temperature (°C)
• \( P \) — Pressure (kPa)

Explanation: The calculation uses empirical data from steam tables that correlate temperature and pressure with enthalpy values for water and steam.

3. Importance of Enthalpy Calculation

Details: Accurate enthalpy values are essential for designing and analyzing thermal systems, calculating heat transfer, and determining system efficiency.

4. Using the Calculator

Tips: Enter temperature in °C, pressure in kPa, and select the phase (liquid or vapor). All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are TLV steam tables?
A: TLV steam tables are comprehensive thermodynamic property tables for water and steam, widely used in engineering calculations.

Q2: What's the difference between liquid and vapor enthalpy?
A: Liquid enthalpy represents the energy in liquid water, while vapor enthalpy includes both sensible heat and latent heat of vaporization.

Q3: What is saturation condition?
A: At saturation, liquid and vapor coexist. The calculator can determine whether the input conditions are subcooled, saturated, or superheated.

Q4: Are there limitations to steam table calculations?
A: Steam tables are accurate for pure water. For other substances or mixtures, different property tables are needed.

Q5: How precise are these calculations?
A: TLV steam tables provide high precision data suitable for most engineering applications.