[MO31] THERMODYNAMIC CYCLESIt is proposed to build a 1000 MWelectric power plant with steam as the working fluid. The condensersare to be cooled with river water. The maximum steam temperature is 550 C, and the pressure in the condenserswill be 10 kPa. Estimate the temperature rise of the river downstream from the power plant.A. AT = 4.9 deg CPowerB. AT = 3.9 deg CplantC. AT = 2.9 deg CD. AT = 1.9 deg CDischargeIntake60 m-8 m deepRiver mean speed10m/minute

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Answered: It is proposed to build a 1000…

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 steam 8.0 MPa and 485 degree Celsius enters the turbine and expand at condenser pressure of 0.006 mpa for cycle and 1kg of steam. determine A.) heat added, B.) Wnet, C.) Thermal Efficiency. And for the engine, Determine the steam flow and the energy output of 40,000 Kw, E.) Wturbine, F.) Energy Chargable, G.) Ideal Heat rate
Complete and legible solution please; The condensing pressure for a Rankine engine is 1 bar. Calculate the work net in KW and thermal efficiency of the cycle when the steam at the beginning of expansion is at 50 bar and (a) saturated, (b) 350 OC, and (c) 640 OC. Note: 1 bar is equal to 100 Kpa
A steam power plant operates on a theoretical reheat cycle. Steam at 25 bar pressure and 400°C is supplied to the high pressure turbine. After its expansion to dry state, the steam is reheated at constant pressure to its original temperature. Subsequent expansion occurs in the low pressure turbine to a condenser pressure of 0.04 bar. Considering feed pump work, Calculate: (i) Quality of steam at entry to condenser (ii) Thermal efficiency (iii) Specific steam consumption.
Superheated steam at 350 0C and 20 bar enters the turbine of steam power plant and expands to a condenser pressure of 7kN/m2 . Assuming the isentropic efficiencies of the turbine and pump are 85% and 80% respectively, calculate a) The thermal efficiency of the cycle b) The heat rate in Btu/kWhr. c) The steam supply in kg /hr to develop 1000 Kw. d) What is the corresponding Rankine cycle efficiency.
A Rankine cycle is executed with steam expanding initially from 20 MPaa and 100 deg SH. Condensation occurs at T = 86.49 degree Celsius. All expansion and compression efficiencies are 90 %. Sketch the equipment layout and the TS diagram. Answer the following for (m = 10 + 25/10 ) kg/sec of steam circulated and fill up the blanks in theitems below: 4. Heat rejected at the condenser in KW (Ideal) Answer: ___________________5. Ideal Rankine engine efficiency (% ) Answer: _________________________6. Ideal Rankine cycle efficiency using work of the pump and turbine values % Answer: _________________________
As shown below, a refrigeration cycle condenses a flow of ammonia from a saturated vapor at 4 barto a saturated liquid. The entering volumetric flow rate of the ammonia is 0.1 m3/s. The ammonia functions asthe cold reservoir for the refrigeration cycle, and the hot reservoir is at 25 ∘C. A faded specification sheet for therefrigeration cycle reads that the required power input is 35 kW.(a) Is this cycle possible? Why or why not?(b) If the cycle is impossible, how much work input is required to make the cycle
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.____________________________
A 60-MW aeroderivative gas turbine plant uses a two-stage compressor with intercooling and a total pressure ratio of 36. The ambient air temperature is 15°C and the pressure is 1 bar. The gas TIT is 1400°C. The compressor and turbine efficiencies are 0.86 and 0.92, respectively. Assume an ideal intercooling to 15°C. In the combustor, natural gas with LHV of 48 MJ/kg is burned. Calculate (a) the plant net specific work, (b) the compressor air mass flow rate.
The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 16.3846 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.___________________________
A steam power plant work between boiler pressure (42 bar) and condenserpressure (0.034 bar). Calculate the efficiency of the cycle and specific steamconsumption for the cases:1. The plant work on Carnot cycle.2. The plant work on Rankine cycle.3. The plant work on Rankine cycle with ηiso (Turb.) = 0.84. The plant work on Rankine cycle and the steam is superheated to 500 Celicus. Neglectwork done on the pump.
The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40 °C and an evaporating temperature of -4 °C shows a refrigeration capacity of 96.4 kW. At this operating points the motor (whose efficiency is 90 percent) draws 28.9 kW. The bore of the cylinders is 87 mm and the piston stroke is 70 mm. The performance data are based on 8 °C of subcooling of the liquid leaving the condenser. Compute 3.1 the actual volumetric efficiency and 3.2 the compression efficiency.
(b) A steam power plant operates on a theoretical reheat cycle. Steam at 25 bar pressure and 400°C is supplied to the high pressure turbine. After its expansion to dry state, the steam is reheated at constant pressure to its original temperature. Subsequent expansion occurs in the low pressure turbine to a condenser pressure of 0.04 bar. Considering feed pump work, Calculate: (i) Quality of steam at entry to condenser (ii) Thermal efficiency (iii) Specific steam consumption.

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