Q3]Consider a combined gas-steam power cycle as shownin the following figure.The gas turbine cycle has a pressure ratio of 7. Air entersthe compressor at 27°C at a rate of 12 kg/s and at the gasturbine at 1027°C. The heat rate transferred at the heatexchanger is 5300 KJ/s. The steam leaving the pump issaturated water at 20 bar and enter the steam turbine asa saturated steam.Determine:1- The air temperature at point 52- Work done by the compressor in KJ/kg.3- Work done by the gas turbine in KJ/kg.4- Flow rate of the steam in kg/s.5- If the work produced by the steam turbine is 0.3of that produced by gas turbine, determine theoverall efficiency (ignore the pump work).2Comp.147Pump406C.C3Heat Exchanger5Condenser4984STGT4

First, we need to find the air temperature at point 5. This can be done using the isentropic…

Answered: Q3] Consider a combined gas-steam power…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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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
Q3) A steam power plant operates on a simple ideal Rankine cycle between the pressures limits of 8000 kPa and 10 kPa. The mass flow rate of steam through the cycle is 25 kg/s. The temperature of steam at the turbine inlet is 400 C. Show the cycle on a block diagram and on a T-S diagram with respect to saturation lines. Calculate: a- The rate of heat input in the boiler and the rate of heat output in the condenser. b-The thermal efficiency of the turbine.
In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below. 3. Calculate the heat input during reheating process.
H4.
From the given data, if refrigerant circulation rate is 0.025kg/s, find the refrigerant effect of the ideal vapour compression cycle.
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A medium size power station is used to produce 30 MW net power for arefinery. The station uses steam as the operating fluid and operatesaccording to the Carnot cycle between the pressure limits of 0.4 bar and35 bar. Steam enters the boiler as a saturated liquid and leaves it as adry saturated vapour. (i) Calculate the thermal efficiency of the power station if theisentropic efficiency of the steam turbine is 94%. (ii) State main disadvantages of using the Carnot cycle as the basis fora power station. (iii) State the name of the cycle that is used in practice in powerstations, along with three key benefits over the Carnot cycle.
A generator uses a gas turbine cycle. Air enters the compressor at a pressure of 1 bar and a temperature of 30°C with a compressor efficiency of 0.85. Hot gas exits the combustion chamber at a pressure of 9 bar and a temperature of 900°C. The power generated by the turbine is 2400 kW with a turbine efficiency of 0.82. a. Draw installation diagrams and T-s cycle process diagramd b. Determine the work of the compressor and turbine and the mass rate of the air requirement c. Cycle thermal efficiency (air: Cp=1,005 kJ/kg. K dan γ=1.4; Gas hot: cp=1,005 kJ/kg K and γ=1.4)
A steam turbine installation of 60 MW capacity has steam entering turbine at 7 MPa, 500oC with steam bleeding at 2 MPa and 0.2 MPa for feed heating. Remaining steam at 2 MPa is reheated upto 480oC. Steam finally leaves turbine at 36 mm Hg (absolute). Give layout, mass fraction of steam bled out per kg of steam generated, cycle efficiency and mass flow rate of steam entering turbine.
Steam Plant A steam power plant operates according to the Rankine cycle between a boiler pressure of 4 MPa and condenser pressure of 6.5 kPa. The steam has a temperature of 380 °C at inlet to the first turbine. It is just dry saturated on leaving this turbine for reheating to its original inlet temperature, before passing through a second turbine to the condenser. Draw a T-s diagram to illustrate the reheat cycle, neglect feed-pump terms and calculate the Rankine efficiency and specific steam consumption.
An open-cycle gas turbine plant will exhaust into a waste heat boiler which receives 66 0C feedwater. The gas turbine plant produces 2611 kW. Air flow rate is 37 kg/kW-hr. Fuel rate, rf/a = 0.014 kg fuel/kg air. Actual exhaust gas temperature = 483 0C. Average exhaust gas Cp = 1.082 kJ/kg.K. Compute the saturated steam at 0.450 MPa that can be produced per hour, assuming that the final gas temperature is 38 0C above the saturation temperature. Show the necessary diagrams.

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