Q12/Consider a reheat-regenerative Rankine power cycle (shown in Fig Q1) with two F.W.Hs, a closed F.W.H and an open F.W.H. Steam enters the H.P turbine at 8.0 MPa, 480 °C and expands to 0.7 MPa. The steam is reheated to 440 °C before entering the L.P turbine, where it expands to the condenser pressure of 0.008 MPa. Steam is extracted from the H.P turbine at 2 MPa and fed to the closed F.W.H at y'=0.169. Feed water leaves the closed heater at 205°C and 8.0 MPa, and condensate exits as saturated liquid at 2 MPa. The condensate is trapped into the open F.W.H. Steam extracted from the L.P turbine at 0.3 MPa is also fed into the open F.W.H, which operates at 0.3 MPa. The stream exiting the open F.W.H is saturated liquid at 0.3 MPa. The net power output of the cycle is 100 MW. Determine: (a) The performance characteristics (nth, HR,ssc). (b) The mass flow rate of the steam entering the first turbine, in kg/h. 71 10 11 8.0 MPa 12 20 MPa 13 0.7 MPa 3 0.3 MPa 0.008 MPa T₁ = 480°C T₁=440°C

Q12/Consider a reheat-regenerative Rankine power cycle (shown in Fig Q1) with two F.W.Hs, a closed F.W.H and an open F.W.H. Steam enters the H.P turbine at 8.0 MPa, 480 °C and expands to 0.7 MPa. The steam is reheated to 440 °C before entering the L.P turbine, where it expands to the condenser pressure of 0.008 MPa. Steam is extracted from the H.P turbine at 2 MPa and fed to the closed F.W.H at y'=0.169. Feed water leaves the closed heater at 205°C and 8.0 MPa, and condensate exits as saturated liquid at 2 MPa. The condensate is trapped into the open F.W.H. Steam extracted from the L.P turbine at 0.3 MPa is also fed into the open F.W.H, which operates at 0.3 MPa. The stream exiting the open F.W.H is saturated liquid at 0.3 MPa. The net power output of the cycle is 100 MW. Determine: (a) The performance characteristics (nth, HR,ssc). (b) The mass flow rate of the steam entering the first turbine, in kg/h. 71 10 11 8.0 MPa 12 20 MPa 13 0.7 MPa 3 0.3 MPa 0.008 MPa T₁ = 480°C T₁=440°C

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

1. A reheat steam cycle has 13.65 MPa pressure at the high pressure turbine inlet and a 2500 kPareheat pressure, the temperature at the inlet of the high pressure turbine and reheattemperature of the steam is 540 0C, condenser pressure is 3.4 kPa, engine efficiency of highpressure and low pressure turbine are both 75 %. Sketch the cycle lay out and cycle T-s diagram.a. Find the enthalpy at each state point. (Summarize)b. Find the actual enthalpy at the exit of the high-pressure turbine and low-pressure turbine.c. Find the cycle thermal efficiencyd. If the net power at the turbine is 100 MW find the mass flow rate of steam, in kg/s;e. Heat rejected by the condenser, in MW
1. A reheat steam cycle has 13.65 MPa pressure at the high pressure turbine inlet and a 2500 kPa reheat pressure, the temperature at the inlet of the high pressure turbine and reheat temperature of the steam is 540 °C, condenser pressure is 3.4 kPa, engine efficiency of high pressure and low pressure turbine are both 75 %. Sketch the cycle lay out and cycle T-s diagram. a. Find the enthalpy at each state point. (Summarize) b. Find the actual enthalpy at the exit of the high-pressure turbine and low-pressure turbine. Find the cycle thermal efficiency С. d. If the net power at the turbine is 100 MW find the mass flow rate of steam, in kg/s; Heat rejected by the condenser, in MW е.
36. Find the efficiency of an ideal Rankine cycle in which superheated steam en- ters the turbine at 773 K and 40 bar. Try three condenser pressures of 2 bar, 0.5 bar, and 0.05 bar. [[Ans.: 0.25, 0.31, and 0.38].
In an ideal Rankine cycle, steam is generated at 4.1 MPa and 480 deg. C. The condenser is at 32 deg. C. Determine: a. The cycle thermal efficiency b. For the engine with the same end states, the thermal efficiency and steam rate.
1. A reheat steam cycle has 13,580 kPa of throttle pressure at the turbine inlet and a 37.50308414 atm reheat pressure, the throttle and reheat temperature of the steam is 1302 R, condenser pressure is 4.3 kPa. Determine the difference between the simple Rankine cycle efficiency and the reheat Rankine cycle efficiency, in percent.
The net power output of the turbine in an ideal reheat-regenertive cycle is 100 MW. Steam enters the high-pressure (H.P.) turbine at 90 bar, 550°C. After .expansion to 7 bar, some of the steam goes to an open heater and the balance is reheated to 400°C, after which it expands to 0.07 bar. (a) What is the steam flow rate to the H.P. turbine? (b) What is the total pump work? (c) Calculate the cycle efficiency. (d) If there is a 10c°rise in the temperature of the cooling 'water, what is the rate of flow of the cooling water in the condenser? (e) If the velocity of the steam flowing from the turbine to the condenser is limited to a maximum of 130 m/s, find the diameter of the connecting pipe.
Thermody Q1: Consider a steam power plant that operates on Rankine Cycle Boiler pressure: 9 MPa; condenser pressure: 10 kPa, turbine inlet temperature: 500 °C, and the isentropic efficiency of the turbine is 85%. Calculate the back work ratio (bwr), specific steam consumption (SSC), the heat removal in the condenser per kW of power output and determine the thermal efficiency (neh) of the cycle.
1. In a Rankine Cycle, dry saturated steam enters the turbine at 10 bar and is expanded isentropic ally to condenser pressure of 0.2 bar. Find a. The condition of the exhaust steam from the turbine. b. If the steam flow rate is 10 000 kg/hr, find the net power output of the cycle. 2. In a Rankine Cycle problem#1, if the boiler pressure is increased to 50 bar , find the improvement in net work output and the cycle efficiency. Assume that dry saturated steam enters the turbine and that the expansion is isentropic. 3. In a Rankine Cycle problem#2, if the isentropic efficiencies of the turbine and the pump are 80% and 85% respectively, find the thermal efficiency and the net power output. Find also the condition of the exhaust steam from the turbine.
(asdfdfhfgjghfkykyk) nvm this Water is the working fluid in an ideal Rankine cycle. Superheated vapor enters the turbine at 10 MPa, 450 ºC, and the condenser pressure is 10 kPa. Determine the thermal efficiency of the cycle.
A steam power plant is operating on the ideal Rankine cycle. The boiler is maintained at 4 MPa, and the condenser at 40 kPa. The steam quality leaving the turbine is at 90%. a.) Draw the proper T-S diagram of the cycle with proper label for the points. b.) Find the temperature of the steam entering the turbine, Qa, Qr, Wt, Wp, Wnet, efficiency, and steam rate
Q.8 In a regenerative steam cycle employing one open feed heater, the steam is supplied to the turbine as dry saturated at 40 bar, and exhausted to the condenser at 0.35 bar. The intermediate bleed pressure is 10 bar. Sketch the layout of the plant and show on the temp | entropy diagram the pressure under gone by the steam, neglecting the pump works, calculate: A. The mass of steam bled from the turbine per Kg of steam leaving the boiler. B. The thermal efficiency of the plant. C. The thermal efficiency of the plant without feed heating. D. The heat rate in (kJ/kW.hr) for the plant with and without feed heating.
Rankine cycle for initially dry saturated steam at 150 psi, condenser pressure of 2 psi. Find the work of cycle in Btu and ft-lb. Also compute the cycle efficiency.Note of the following data from the steam table:At 150 psia: Tsat=358.4 deg. FVf=0.0180 ft3/lb, vg=3.016 ft3/lb; uf=330.2 Btu/lb; ug=1111.2 Btu/lb; hf=330.5 Btu/lb; hfg=863.6 Btu/lb; hg=1194.1 Btu/lb; sf=0.5138 Btu/lbR; sfg=1.0556 Btu/lbR; sg=1.5694 Btu/lbRAt 2 psia: Tsat=126.04 deg. FVf=0.016 ft3/lb, vg=173.75 ft3/lb; uf=94.02 Btu/lb; ug=1051.8 Btu/lb; hf=94.0 Btu/lb; hfg=1022.2 Btu/lb; hg=1116.2 Btu/lb; sf=0.1749 Btu/lbR; sfg=1.7451 Btu/lbR; sg=1.9200 Btu/lbR