What is the equation of steady state steady flow process?
What is the equation of steady state steady flow process?
In a steady state steady flow process taking place in a device with a single inlet and a single outlet, the work done per unit mass flow rate is given by w = − ∫ i n l e t o u t l e t v d p , where v is specific volume and p is the pressure.
How do you calculate enthalpy flow?
In the simplest case of an ideal gas, we multiply mass with specific enthalpy or with specific heat at constant pressure and temperature. Similarly, to find enthalpy flow we multiply mass flow by specific enthalpy or by specific heat at constant pressure and by temperature.
How can you explain the steady flow condition?
steady: A steady flow is one in which the conditions (velocity, pressure and cross- section) may differ from point to point but DO NOT change with time. (In practise there is always slight variations in velocity and pressure, but if the average values are constant, the flow is considered steady.
What a steady flow energy equation is as applied to steam nozzles?
h1−Q=h2h1−Q=h2 Where Q = Heat lost by 1 Kg of steam passing through the condenser. Nozzle: In case of a nozzle as the enthalpy of the fluid decreases and pressure drops simultaneously the flow of fluid is accelerated. This type of flow is called steady flow.
What do you mean by steady flow process apply steady flow energy equation to nozzle & compressor?
How is steady flow energy equation applied to turbine?
For steady flow devices, such as turbines, compressors and pumps, is power transmitted through a shaft. The unit of ke is m2/s2 which is equivalent to Joule/kg. The enthalpy is usually given in kJ/kg. So kinetic energy should be expressed in kJ/kg.
How do you calculate kinetic energy from force?
To calculate the force of impact, divide kinetic energy by distance.
What is enthalpy in an open flow system?
In an open flow system, enthalpy is the amount of energy that is transferred across a system boundary by a moving flow. This energy is composed of two parts: the internal energy of the fluid (u) and the flow work (pv) associated with pushing the mass of fluid across the system boundary.
What is the first law of enthalpy?
The first law relates the change in energy between states 1 and 2 to the difference between the heat added and the work done by the system. Frequently, however, we are interested only in the work that crosses the system boundary, not the volumetric or flow work. In this case it is most convenient to work with enthalpy.
What does the steady flow energy equation tell us?
The steady flow energy equation tells us that if there is no heat or shaft work (the case for our adiabatic inlet) the stagnation enthalpy (and thus stagnation temperature for constant Cp) remains unchanged. Thus T T1 = T Tatm = T atm
What is the physical interpretation of enthalpy?
This also leads to a direct physical interpretation for enthalpy. In an open flow system, enthalpy is the amount of energy that is transferred across a system boundary by a moving flow.
