1. A steam turbine system has a boiler pressure of 40 bar and the emergentsteam is superheated to 500°C. The condenser pressure is 0.04 bar. If theexpansion and compression stages have ideal efficiency,(i)What is the thermal efficiency, dryness fraction and specific steam consumption ofthe cycle considered, If the cycle is having one reheat stage to the superheattemperature?What is the thermal efficiency, dryness fraction and specific steam consumption ofthe cycle considered, if the cycle is having one bleed point (open heater) at thepressure where the steam become saturated after first expansion?(ii)

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Answered: 1. A steam turbine system has a boiler…

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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Problem (1.2) A steam power plant working according to simple Rankine cycle. It has a high pressure of 3 MPa and it maintains 60°C in the condenser. A condensing turbine is used, but the quality should not be lower than 90% at any state in the turbine. Find the cycle efficiency. [reference: Fundamentals of Thermodynamics by Borgnakke & Sonntag prob.11.18,p-460].(Ans.33.2 %).
A reheat cycle with two stages of reheating is executed, with steam expanding initially from90 bar and 530 ̊C. The two reheater pressure are 10 bar and 0.6 bar, and the steame leaveseach reheater at 480 ̊C. Condensation occurs at 0.04 bar. For an ideal cycle, find (a) QA and e. (b) For the engine, ignore the pressure drop through the reheaters, let thee engineoperate through the same states and compute W and e. (c) What is the steam flowrate for an engine output of 20,000kW?
When a steam boiler generates saturated steam at 2.5 mpa and the condenser pressure is 20 kpa, what is the Rankine cycle efficiency?Show complete step-by-step process and solution.
Q.3 A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 75 kN/m?. Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature. B. If the steam leaves the boiler at 350°C with the same pressure of the boiler and condenser given above. Explain why the Rankine efficiency in (A) is less than in (B), and why the ratio of efficiencies of the respective Rankine and Carnot is greater.
Please help with this Question 2. Please it's urgent.
The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 1 + (200/13) kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa. Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: PV and TS diagrams of the cycle showing ideal and actual process lines Heat rejected at condenser (KJ/sec). Ans.____________________________ Mass of cooling water in kg/sec if cp H2O = 4.18 KJ/kg-K, and inlet temp of water to condenser = 20 deg C, outlet temp is 35 deg C. Ans.____________________________ Rankine engine efficiency (%). Ans.____________________________ Cycle thermal efficiency ( %). Ans.____________________________
5. Steam is generated at 6.10 MPa and 4500C and condensation occurs at 170 kPa. (a)For a Rankine engine operating between these limits, compute the thermal efficiency and the heat rate. (b) Considering that a Rankine cycle occurs between the limits, determine QA, QR, WNet, and eC. (c) What mass flow rate is required for a net output of 35 MW? Please answer what is asked in a, b and c. Thanks
Thermodynamics, advacce physics
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 engineat 540 ̊C. Expansion now occurs to the condenser pressure of 0.0035 MPa (a) For theideal cycle, find e. (b) A 60,000 kw turbine operates between the same state piontsexcept that the steam enters the reheater at 1.95 MPa and 260 ̊C, departs at 1.8 MPa and540 ̊C. the steam flow is 147,000 kg/hr, generator efficiency is 96%. For actual enginefind ek, mk, and nk.
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.
2. A regenerative vapour power cycle uses three closed feed heaters, The steam enters the lirst turbine stage at 40 bar and 450 °C and enters the condenser at 0,04 bar. Assuming the cycle is ideal, and choosing the bleed pressures such that the difference between the maximum and the minimum saturated steam temperature is divided into approximately equal intervals, caleulate: (i) The ideal cycle efficiency (ii) The specifie steanm consumption. 40 bar

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