Steam expands in a thermally isolated turbine steadily.
The inlet pressure is 1MPa and temperature is 800 C, and the
exit state is 300 kPA and 150 C.
a- Determine the power generated by the turbine per unit mass
flow rate of steam.
b- Evaluate the entropy generation rate per unit mass flow rate
of steam and drive a conclusion whether the turbine operates
reversibly, irreversibly or the operation is impossible.
A boiler produces steam at a saturated temperature of 300C and
at dryness of 92% from feedwater at 110C The boiler evaporating
rate is 70 kg min. What is boiler heat rate ?
The density of steam at pressure 1.100 kPa is ?
Correlations: -0.9, -0.5, -0.2, 0, 0.2, 0.5, and 0.9. For each,
give the fraction of the variation in Y that is explained by the
least- squares regression of Y on X. Summarize what you have found
from performing these calculations.
Saturated water vapor at 1000 kPa is throttled to 100 kPa. The
velocity of the steam remains constant through the process.
Determine the exit temperature of the water vapor. I know this is
already awnsered in a solution for 1st edition but can someone help
me understand what they do and how they picked the numbers they did
from some table to get the exit temperature?
A closed system consists of 0.5kg of superheated steam initially
at 1MPa, 300 0C. The system undergoes a reversible
isothermal process during which the steam condenses to a saturated
liquid whilst exchanging heat wih a reservoir at 300C.
Show the process on a T-s diagram and calculate the change in
enthropy (kJ/K) of the system, the reservoir (surroundings) and the
universe.
The temperature and pressure of the steam at the inlet of a high pressure turbine is 500 ° C, respectively. It is 12 MPa and 300 ° C and 3MPa at its outlet. If the mass flow of steam is 400 kg / h, how much is the isentropic efficiency of the turbine?
Refrigerant-134a is throttled from the saturated liquid state at
700 kPa to a pressure of 160 kPa. Determine the temperature drop
during this process and the final specific volume of the
refrigerant.
Steam is compressed to a saturated vapor state at constant
pressure. The steam started at 2 MPa and 365 C. What work was
required and what was the specific heat transfer?
Please show work so I can actually learn!
Steam enters the high-pressure turbine of a steam power plant
that operates on the ideal reheat Rankine cycle at 6 MPa and 500°C
and leaves as saturated vapor. Steam is then reheated to 400°C
before it expands to a pressure of 10 kPa. Heat is transferred to
the steam in the boiler at a rate of 6*104 kW. Steam is
cooled in the condenser by the cooling water from a nearby river,
which enters the condenser at 7°C. Show the...