Q5/ A steam power plant operates with a boiler output of 20 kg/s steam at 2 MPa and600°C. The condenser operates at 50 C, dumping energy intoa river that has an averagetemperature of 20 C. There is one open feedwater heater with extraction from the turbineat 600 kPa, and its exit is saturated liquid. Find the mass flow rate of the extraction flow. Ifthe river water should not be heated more than 5 C, how much water should be pumpedfrom the river to the heat exchanger (condenser)?For the temperature of condensate is (50 °C), the temperature of cooling water ofcondenser at inlet and outlet is (20 °C and 35 °C) respectively. The mass of condensercooling water per kg of steam is (32 kg). Determine the dryness fraction of the steam at itenters the condenser

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Answered: Q5/ A steam power plant operates with a…

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

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2.A steam throttling valve with inlet conditions of 3MPA and 500C is connected to the inlet of the turbine. The turbine has 800kW power output and heat absorbed of 500kw. If the mass flow rate is 1kg/s and the exit temperature of steam is 400C, find the exit turbine pressure. (
Cogeneration is often used where a steam supply is needed for industrial process energy. Assume a supply of 5 kg/s steam at 0.5 MPa is needed. Rather than generating this from a pump and boiler, the setup in below. is used so the supply is extracted from the high-pressure turbine. Find the power the turbine now cogenerates in this process. 2 3 HP LP
Draw the T-s diagram and Plant Lay-Out A steam power plant has a steam generator (boiler) exit at 4 MPa, 500°C and a condenser exit temperature of 45°C. Assume all components are ideal and find the: (A) Ideal pump work(B) Heat added in the boiler(C) Heat rejected in the condenser(D) Net cycle Work(E) Cycle thermal Efficiency
A thermal power plant operates such that the steam exits boiler at 4 MPa, 400C and the condenser pressure is 10 kPa. The efficiency of the turbine and pump is 85% and 90% respectively. a. Draw the plant PFD (Process Flow Disgram) and the process Ts diagram and calculate quality of steam discharge from the turbine as well as the plant's thermal efficiency. b. If the plant produces 300MW of net power, - What is the steam flowrates in kg/hr? - If the plant uses natural gas as a fuel, determine the flowrate of NG in MMSCMD. State the reference for your data. - If the plant uses coal as a fuel, determine the amount of coal required (tonne per annum). State the reference for your data and all your assumptions. c. How much power required by the pump in kW? Is this the real power required by the pump? Explain d. Find the heat rejected in the condenser and evaluate the thermal efficiency using this value. e. The heat rejected to surrounding is through a cooling water system from a nearby ocean.…
Water enters the cooling tower at 55°C and leaves at 30°C while the heat rejected to air is 120kW. Find the capacity of the pump needed to pump the water
In a steam power plant that uses reheat cycle steam at 15.5 MPa, 545 °C enters the engine and expands to 1.95 MPa. At this point the steam is withdrawn and passes through a reheater. It reenters the engine at 535 °C. Expansions now occur to the condenser pressure of 0.0035 MPa. Find the efficiency in %.
2. A reverse Carnot cycle requires 3 hp and extracts energy from the laketo heat a house .If the house is kept at 70°Fand requires 2110 kj/min... what is the temperature of the lake?
A one-stage compressor with an ideal intercooler receives 0.5m3/s of Helium at 150kpa and 300K and discharges it at 8600kpa. Find the heat rejected(kw) at the intercooler. Ans:0 Provide solution
A Steam power plant uses a Rankine cycle to produce electrical power. The boiler pressure is 2 MPa and the temperature at the turbine inlet is 300C. The pump inlet pressure is 0.025 MPa and the entropy is 0.8931 kJ/kg-k. The turbine gives 1MW of work to the generator. Find the dryness of the steam at turbine exit, Wp, Qa, Qr, Wt, Wnet, efficiency, SR, and mass flow rate of steam. (84.65%, 2.0143 kJ/kg, 2749.56 kJ/kg, 1986.15 kJ/kg, 765.42 kJ/kg, 763.41 kJ/kg, 27.76%, 4.7157 kg/kWh, 1.3064 kg/s) -Draw the T-S diagram with properly labelled points and solve the problems. Show your COMPLETE solution - Use the Steam Table provided if necessary.
1. In a Regenerative cycle, the steam is extracted from the turbine at 2 Mpa and 250C for feedwater heating and it is mixed with condenser exit at 30 kpa after pumping. Find the fraction of vapor extracted from the turbine.
A one-stage compressor with an ideal intercooler receives 0.5m3/s of Helium at 150kpa and 300K and discharges it at 7600kpa. Find the heat rejected(kw) at the intercooler. ANS. 0
Steam at 6.2 MPa and 480°C is received by a regenerative engine. Extractions for feedwaterheating occurs at 3 MPa and again at. 1.4 MPa,with the remaining steam expanding to0.0065 MPa. For the ideal engine with a throttla flow of 54,500 kg/h, find the hourlyquantities of steam ex-tracted, the turbine work in kW, and the thermal efficiency. For an ideal cycle through the same states, calculate Q and e。

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