The Steady Flow Energy Equation (SFEE) is an equation that relates the three main properties of a system in thermodynamics: Mass Flow Rate (M) Temperature...
The Steady Flow Energy Equation (SFEE) is an equation that relates the three main properties of a system in thermodynamics:
Mass Flow Rate (M)
Temperature (T)
Specific Enthalpy (h)
The equation is:
M * T * dh = Constant
where:
M is the mass flow rate of the fluid
T is the temperature of the fluid
dh is the change in specific enthalpy of the fluid
The Constant represents the energy transfer rate between the system and its surroundings. It is a constant for a closed system at steady state, meaning that the internal energy of the system remains constant.
This equation can be used to calculate the rate of energy transfer in a system by multiplying the mass flow rate by the specific enthalpy change. The constant in the equation represents the rate at which energy is transferred from the system to its surroundings.
For example, if the mass flow rate of a gas is 10 kg/s, the specific enthalpy change is 20 kJ/kg, and the system is at a temperature of 300 K, the steady flow energy equation would be:
10 kg/s * 300 K * 20 kJ/kg = Constant
This means that the rate of energy transfer from the system to its surroundings is constant and equal to 20 kJ/s