Prove that there is no shaft work using the first laws
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A tank contains air at 400 kPa, 300 K, and a valve opens up for flow out to outside which is at 100 kPa, 300 K. How does state of the air that flows out change?
Consider the cooling to be a reversible process and find the specific heat transfer from the entropy equation.
Steam enters a turbine at 3 MPa, 450oC and expands in a reversible adiabatic process. What is the mass flow rate of steam through the turbine?
Determine the exit pressure and cross-sectional area of the nozzle if the mass flow rate is 0.15 kg/s and the expansion is reversible and adiabatic.
Assume you do not know that there is no work. Prove that there is no shaft work using the first and second laws of thermodynamics.
A diffuser is a steady-state device in which a fluid flowing at high velocity is decelerated. What are the exit pressure and temperature of the air?
A highly cooled compressor brings a hydrogen gas flow at 300 K, 100 kPa up to a pressure of 800 kPa. Find the specific work assuming a reversible process.
The kinetic energy into and out of the compressor can be neglected. Find the compressor work and its exit temperature and find the nozzle exit velocity.
The isentropic turbine efficiency is 70% and the inlet volumetric flow rate is 20 L/s. What is the turbine inlet pressure and the turbine power output?
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