4-2 A steam cycle power system operates on a Rankine cycle with a closed feedwater heater. The turbine efficiency is 93% and the condensate (out of the condenser) is 2°C subcooled. [2 degrees subcooled means 2 degrees below saturation temperature.] Steam enters the turbine at 470°C and 5.0 MPa and exhausts at 20 kPa to the condenser. Steam is extracted at 1000 kPa for the closed feedwater heater and is returned to the condenser after being throttled to the condenser pressure. Assume that the water leaving the closed feedwater heater at 7 has a quality of 10%. The temperature at 3 is the same as the temperature at 7 (Ty T7.) The pump is NOT isentropic! Determine the (a) extraction y as a fraction of total steam flow rate, (b) work produced by the turbine (in kJ/kg), (c) work done by the pump (in kJ/kg). (d) the heat added by the boiler per unit cycle (in kJ/kg) and (e) the thermal efficiency. Turbine MPa Boiler I MPa y S5 Condenser 1-y 20 kPa Closed fwh Jout 6s 6. Pump

4-2 A steam cycle power system operates on a Rankine cycle with a closed feedwater heater. The turbine efficiency is 93% and the condensate (out of the condenser) is 2°C subcooled. [2 degrees subcooled means 2 degrees below saturation temperature.] Steam enters the turbine at 470°C and 5.0 MPa and exhausts at 20 kPa to the condenser. Steam is extracted at 1000 kPa for the closed feedwater heater and is returned to the condenser after being throttled to the condenser pressure. Assume that the water leaving the closed feedwater heater at 7 has a quality of 10%. The temperature at 3 is the same as the temperature at 7 (Ty T7.) The pump is NOT isentropic! Determine the (a) extraction y as a fraction of total steam flow rate, (b) work produced by the turbine (in kJ/kg), (c) work done by the pump (in kJ/kg). (d) the heat added by the boiler per unit cycle (in kJ/kg) and (e) the thermal efficiency. Turbine MPa Boiler I MPa y S5 Condenser 1-y 20 kPa Closed fwh Jout 6s 6. Pump

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

This is a fluid machine question. 1. A single stage centrifugal pump delivers 900 m^3/hr of sea water from a source where the water where the pressure is O.125 mpag. The pump discharges into surge tank rated at 300 psig, 3 m above the pump centerline. Loss of head due to friction in suction is 0.8 m and that in the discharge side is 3 m . Calculate the power required by the pump in kW. 2. An atmospheric tank at standard ambient conditions will serve as the source for a pump. It is calculated the length of the suction pipe is 200 m with friction factor of 0.02. What would be the minimum height of water level in the tank that must be maintained above the centerline of the pump to avoid cavitation? Pump specifications are as follows: Flow: 225 cu.m/hrHead: 20 mPower: 15 kNSuction flange and Pipe Diameter: 200 mmDischarge Flange and Pipe Diameter: 150mmNPSHa: 6.5 mNSPHr : 6m
A pump operates at 600 W, the mass flow rate of the liquid is 1 kg/s, at the inlet the fluid is stagnate, and velocity at exit is 12 m/s, the mechanical efficiency of the pump is: Select one: a. 0.90 O b. 0.91 O c. 0.92 O d. 0.89 e. none of the mentioned
The water pump operates at (600 r.p.m) to a head (8m), the power consumption by the pump is (5 kW), the overall efficiency is (0.8) finds the discharge.
A two stage air compressor has a suction condition of 100 kpa, 30 o C and has a capacity of 3m3/s. The discharge pressure is 750 kpa. Find the heat loss in the intercooler.
Is the suction process is different in actual working of IC engine? If yes then explain?
(b) Describe the difference between: i. Reciprocating pump and Centrifugal pump ii. NPSHA and NPSHR
"What type of lizard pump belongs to and why? Explain that through laws?
An axial pump that delivers 15 gpm, has a volumetric efficiency is 93%. Find its theoretical flow rate QT?
Please answer with explanation Thanks
One compressor has a compression ratio of 13. The pressures input is -0.2 psig. The ambient pressure is 14.3 psia. Find the pressures output from the compressor in psia?
2- Air compressor takes air of mass flow rate (9kg/min) at (100kPa) and (300K). Air leaves the compressor at (600kPa) to the tank. If the compression according to PV 25-C. determine the required power to operate the compressor if the mechanical efficiency is (80%).
A Kaplan turbine operates at (45 rpm) with a blade peripheral velocity of (14 m/s). The hub to tip diameter ratio is (0.5). The inlet blade tip has zero angle with the axial direction while the inlet guide vane and outlet blade angles are (30°) and (22º) respectively. If the specific speed is (130), find the overall efficiency of the turbine. NS