Q3]A steam power plant operates on an idealreheat Rankin Cycle. The plant maintainedthe boiler at 7000 kPa. The pressure enteringthe low-pressure turbine is at 800kPa andleaving it at 10kPa. Assume the followinginformation:T-373C, S-6.34kJ/kg.K, h3-3085.5kJ/kgTs 416.2C, S, 7.62kJ/kg.K, h, 3302kJ/kgDetermine the1- The dryness fraction at each exit of theturbines2- The work of pump and eachturbine3- The cycle's thermal efficiency.4- Draw T-S DiagramPumpWBoiler35HPTLPTCondenser

The dryness fraction (x) is a measure of the quality of steam, i.e., the amount of water vapor…

Answered: Q3] A steam power plant operates on an…

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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A boiler plant produces 40tonne of steam per hour for the turbine propulsion plant. This steam is at 6000kPa, 460°C. The turbine unit consists of 3 turbines HP, IP and LP. Between the HP and IP there is a reheater which isobarically raises the steam temperature to 440°C. The exhaust pressures of each turbine are 1000kPa, 200kPa and 4kPa respectively. The isentropic efficiencies of each turbine is 85%. Determine: (a). the condition of the steam at each exhaust (b). the power developed by the turbine plant (c). Rankine efficiency including the feed pump (d). specific steam consumption (e). heat removed from the condenser by the seawater per minute
In an ideal steam cycle, steam at (20 bar, 360 C°) is expanded in a turbine to (0.08 bar). It then enters a condenser where it is condensed to saturated liquid water. Then the 4- pump feeds back the water into the boiler. Find per kg of steam (a) Wnet (b) nth (c) if(nr = nP = 80%), find the percentage reduction in wnet andnth Ans. (a) 969.61 (kj/kg) (b) 32.5% (c) 20.1 % (d) 20.1 %
An idealcold air-standard Brayton cycle produces some quantity of power. Air with a mass flow rate of 6 kg/s enters the compressor at 100 kPa, 300 K.It is also known that the compressor has a pressure ratio of 10 and the turbine inlet temperature is 1400 K.If k = 1.4for the working fluid, determine the thermal efficiency, the ratio of back work, and the net power for the cycle in kW.
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2 Steam at 5m Pa and 500 °c enters a nozzle steadily witth a velocity ef 80 mb and it leaves at 2 MPa and 400°c. indet area f a rafe of 4ee 90R/ The the nozzle is 50 cm² and heat is being lost at kJ determine the mass flow rate of the steam, b the exit velocity of the steam . 약 9. ithe exit area of the nozzle. of
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In a reheat cycle steam at 15 Mpa, 540°C enters the engine and expands to 1.95 Mpa. At this point the steam is withdrawn and passed through a reheater. It reenters the engine at 540°C. Expansion now occurs to the condenser pressure of 0.0035 Mpa. (a) For the ideal cycle, find ee (b) A 60,000 kW turbine operates between the same state points except that the steam enters the reheater at 1.95Mpa and 260°C, departs at 1.8 Mpa and 540°C. The steam flow is 147,000 kg/hr; generator efficiency is 96%. For actual engine, ek, mk, and nk, (c) Determine the approximate enthalpy of the exhaust steam if the heat lost through the turbine casing is 2% of the combined work.4. Steam at 200 bar, 760°C enters the thrott
Q3] A steam power plant operates on the reheat Rankin Cycle. Steam enters the high-pressure turbine at 10 MPa and 600 C and leaves at 2MPa. Steam is reheated at constant pressure to 450 C before it expanded in the low-pressure turbine. Steam leaves the low-pressure turbine at 1 bar and leave the condenser as a saturated liquid. Determine the 1- The work of each turbine 2 Boiler 2- The work of pump 1 3- The cycle's thermal efficiency. Pump 4- Draw T-S Diagram 3 5 HPT LPT Condenser 6
Instead, assume variable specific heat A gas-turbine power plant operates on the simpleBrayton cycle between the pressure limits of 100 and 800 kPa.Air enters the compressor at 308C and leaves at 3308C at amass flow rate of 200 kg/s. The maximum cycle temperatureis 1400 K. During operation of the cycle, the net power outputis measured experimentally to be 60 MW. Assume constantproperties for air at 300 K with cv 5 0.718 kJ/kg·K, cp 51.005 kJ/kg·K, R 5 0.287 kJ/kg·K, k 5 l.4.(a) Sketch the T-s diagram for the cycle.(b) Determine the isentropic efficiency of the turbine forthese operating conditions.(c) Determine the cycle thermal efficiency.

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