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Enthalpy Calculation Formula:
Where: h = enthalpy (kJ/kg), t = dry-bulb temperature (°C), W = humidity ratio (kg/kg)
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Enthalpy calculation in psychrometrics determines the total heat content of moist air, combining both sensible and latent heat components. It's a crucial parameter in HVAC system design and analysis.
The calculator uses the standard psychrometric enthalpy formula:
Where:
Explanation: The equation calculates the total energy content of moist air by summing the sensible heat of dry air, sensible heat of water vapor, and latent heat of vaporization.
Details: Accurate enthalpy calculation is essential for HVAC system design, energy efficiency analysis, psychrometric process calculations, and thermal comfort assessments in building environments.
Tips: Enter dry-bulb temperature in °C and relative humidity in percentage. Valid temperature range: -50°C to 100°C. Valid RH range: 0% to 100%.
Q1: What is the difference between enthalpy and temperature?
A: Temperature measures sensible heat only, while enthalpy includes both sensible and latent heat components of moist air.
Q2: Why is enthalpy important in HVAC systems?
A: Enthalpy helps determine the energy required for air conditioning processes and is used in heat load calculations and system efficiency analysis.
Q3: What are typical enthalpy values for comfort conditions?
A: For human comfort, enthalpy values typically range between 30-60 kJ/kg depending on temperature and humidity conditions.
Q4: How does altitude affect enthalpy calculations?
A: The standard formula assumes sea level pressure (101.325 kPa). For higher altitudes, pressure correction factors should be applied.
Q5: Can this calculator be used for industrial processes?
A: Yes, but for extreme conditions or precise industrial applications, specialized psychrometric charts or software may be required.