2.In a regenerative steam cycle, steam enters the turbine at 7.2 Mpa and 510°C. Steam is extracted from the turbine at 610 Kpa pressure for feed water heating. The remaining steam continues to expand to 11 Kpa. The recovered condensates are pump back to the boiler. a) calculate the quantity of the extracted steam, b) for a throttle steam of 30 kg/sec, calculate the turbine work in Kw. c) calculate the cycle thermal efficiency

2.In a regenerative steam cycle, steam enters the turbine at 7.2 Mpa and 510°C. Steam is extracted from the turbine at 610 Kpa pressure for feed water heating. The remaining steam continues to expand to 11 Kpa. The recovered condensates are pump back to the boiler. a) calculate the quantity of the extracted steam, b) for a throttle steam of 30 kg/sec, calculate the turbine work in Kw. c) calculate the cycle thermal efficiency

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

4. Water is the working fluid in a vapor power plant. Superheated steam leaves the steam generator at 8.2 MPa, 540 °C and enters the turbine at 7.5 MPa, 500 °C. The steam expands through the turbine, exiting at 8 kPa with a quality of 94%. Condensate leaves the condenser at 5 kPa, 30 °C and is pumped to 9 MPa before entering the steam generator. The pump efficiency is 80%. Determine (a) the thermal efficiency of the cycle and (b) the net power developed. (c) What-if Scenario: What would the net power developed be if the mass flow rate of steam were 15 kg/s ?
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.
An ideal Rankine cycle operates between the pressure limits of 15 MPa in the boiler and 50 kPa in the condenser. The boiler generates steam at a mass flow rate of 50 kg/ s and it enters the turbine at a temperature of 1100°C. a) Calculate the net power output of the cycle, b) Calculate the thermal efficiency of the cycle.
.
2. An electrical power plant that uses the Rankine cycle has a pump to increase the water pressure and multiply it by 50. In addition, there is a boiler whose fuel has a calorific value of 35 MJ/kg. The water that enters the process has a temperature of 60 °C and is at atmospheric pressure. The steam that leaves the turbine has a quality of 70% and the work generated in the turbine is 300 MW. a. How much water is needed to run the plant? b. What is its efficiency?
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
Write legibly, provide manual step by step solution, and diagram for below given problem. A supercritical power generates steam at 25 Mpa and 560. The condenser pressure is 7 kpa. Determine the exit quality of steam if it expands through a turbine in this power plant. a. 45.66% c. 56.66%b. 68.45% d. 74.26%
A power plant operating in a Reheat Rankine Cycle produces steam at 3 MPa, 600oC in the boiler. It keeps the condenser at 45oC by transfer of 10 MW out as heat transfer. The first turbine section (high-pressure) expands to 500 kPa and then flow is reheated followed by the expansion in the low-pressure turbine. Provide a detailed solution. Avoid shortcuts. Compute for the Pump work input (kJ/kg)
In a Brayton Cycle air enters the compressor at 101.32 kPa, 32 °C and leaves at a pressure of 808 kPaa. The air is heated to 717 °C in the combustor. For a net output of 2125 kW, compute: a) mass flow rate of air (kg/s), b) thermal efficiency of the cycle. use k = 1.4 for all problems
6.2) There is a regenerative cycle that uses steam as the working fluid. Steam leaves the boiler and enters the turbine at 4 MPa and 400°C. After an expansion to 400 kPa, part of the steam is withdrawn from the turbine in order to heat the feedwater in an open feedwater heater (FWH). The pressure in the heater is 400 kPa, the water that leaves is a saturated liquid at 400 kPa, and the non-extracted steam expands at 10 kPa. Determine the efficiency of the cycle Boiler Turbine T Water boiler Condenser B Pump 2 Be Pump 1 Ans: Ans: NT-37%
1.) A Steam power plant operates using the ideal Rankine Cycle where steam initially enters the turbine at 5.0 MPa and 400C then after expanding, it condenses at 7 kPa and exits as saturated liquid. Draw the TS diagram, find the thermal efficiency, and steam rate.
Steam is supplied to a two-stage turbine at 40 bar and 350 o It expands in the first turbine until it is just dry saturated, then it is reheated to 350 oC and expanded through the second stage turbine; the isentropic efficiencies of the first and second stage turbines are 84 % and 78 % respectively. The condenser pressure is 0.035 bar. Sketch the process on a T-s diagram and calculate; i. The work output and heat supplied per kg of steam for the plant assuming ideal processes ii. The thermal efficiency of the cycle iii. The specific steam consumption