Air Enthalpy Calculator:
Enter the values of air temperature, T(°C)to determine the value of Enthalpy of air, E.
Air Enthalpy:
Air enthalpy is a thermodynamic property that represents the total heat content of air, including both the sensible heat (due to temperature) and latent heat (due to moisture or humidity).It represents the energy needed to increase the temperature or alter the phase of water vapor present in the air.
Air enthalpy is commonly used in HVAC (Heating, Ventilation, and Air Conditioning) systems to evaluate the thermal energy of air in various environments.It is essential for calculating energy transfer, especially in air conditioning, drying, and ventilation processes.Enthalpy is expressed in units of kilojoules per kilogram (kJ/kg) or in this simplified model, just in arbitrary energy units (E) for easy HVAC design estimations.
The enthalpy of dry air is mainly influenced by its temperature and can be estimated using a linear relationship.For dry air, the enthalpy value increases with temperature, assuming constant pressure and no added moisture.
The coefficient 1.007 in the equation refers to the specific heat of air at constant pressure.The subtraction of 0.026 accounts for empirical adjustments to match standard conditions.This simplified linear formula is useful for quick estimates of air energy content in controlled systems.
By knowing the temperature, engineers can easily compute the energy carried by airflows in systems.Air enthalpy calculations help in sizing HVAC equipment and optimizing energy efficiency.The formula does not include humidity directly, making it suitable only for dry air scenarios.
When humidity is involved, a more complex psychrometric analysis is required.
Still, this formula serves as a handy tool in many standard engineering applications.
Enthalpy of air, E equals 1.007 multiplied by the air temperature, T(°C) in degrees Celsius minus 0.026.
Enthalpy of air, E = 1.007 * T(°C)– 0.026
E = air enthalpy.
T(°C)= air temperature in degree Celsius, °C.
Air Enthalpy Calculation:
- If the temperature of air is 30°C, calculate its enthalpy.
Given: T(°C)= 30°C.
Enthalpy of air, E = 1.007 * T(°C)– 0.026
E = 1.007 * 30 – 0.026
E = 30.21 – 0.026
E = 30.184.
- If the enthalpy of air is 20.114 units, find the temperature.
Given: E = 20.114.
Enthalpy of air, E = 1.007 * T(°C)– 0.026
T(°C)= (E + 0.026) / 1.007
T(°C)= (20.114 + 0.026) / 1.007
T(°C)= 20.14 / 1.007
T(°C)= 20°C.