Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Problem 1:
The boiler of a power steam cycle operates at 6000 kPa and the condenser at 50 kPa. At the
entrance to the turbine, the temperature is 500°C. The isentropic efficiency of the turbine is 90
percent, pressure and pump losses are negligible, and the water leaving the condenser is
subcooled by 6.3°C. The boiler is sized for a mass flow rate of 18 kg/s. You are asked to:
a. Represent the cycle on P-v and T-s diagrams.
b. Compute the rate at which heat is added in the boiler.
c. Compute the power required to operate the pumps.
d. Determine the net power produced by the cycle.
e. Compute the thermal efficiency.
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- PROBLEM: A flashed-steam geothermal power plant is located where underground hot water is available as saturated liquid at 715 kPa, The well head pressure is 680 kPa. The flashed steam enters a turbine at 635 kPa and expands to 15 kPa, when it is condensed. The flow rate from the well is 35.3 kg/s. Determine: Draw the T-S diagram The mass flow rate of steam in kg/s The power produce in KW The cooling water flow in kg/s if water is available at 25 oC and a 15°C rise is allowed through the condenser.arrow_forwardQ5/ For a steam power plant, the turbine operates isentropically and adiabatically with inlet steam at 6800 kPa and 550 °C and the exhaust steam enters the condenser at 50 °C. Saturated liquid water leaves the condenser, and is pumped to the boiler. Neglecting pump work and kinetic and potential energy changes, determine the thermal efficiency of the cycle?arrow_forward
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