FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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Superheated steam at
a pressure of 10 bar and
400°C is supplied to a
steam engine. Adiabatic
expansion takes place
to release point at 0.9
bar and it exhausts
into a condenser at
0.3 bar. Neglecting
clearance, for a steam
flow rate of 1.5 kg/s
determine the quality
of steam at the end of
expansion and the end
of constant volume
operation, power
developed, specific
steam consumption
and modified Rankine
cycle efficiency.
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In a gas turbine power plant, air at 10°C and I bar is compressed to a
pressure of 4 bar by a compressor. The air is then heated in a 100%
efficient heat exchanger and in the combustion chamber to a
temperature of 700°C. heat exchanger and the combustion chamber
is 0.14 bar. Calculate the power plant efficiency.
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- Q4: An aero engine is using octane C₁2H24 as a fuel. The temperature of the working fluid at the inlet and outlet of combustion chamber are Tor 650 K and To2= 1600 K. The fuel heating value is QHV= 42,800 kJ/kg. The specific heats of cold and hot streams are Cpc=1.005 kJ/(kg K) and Cph= 1.23 kJ/(kg K). Calculate the equivalence ratio. .arrow_forwardDetermine: a)Work of the compressor(kW) b)COP of the cyclearrow_forwardIn a gas turbine plant, the pressure ratio, through which air at 15°C is compressed, is 6. The same air is then heated to a maximum permissible temperature of 750°C first in a heat exchanger which is 75% efficient and then in the combustion chamber. The same air at 750 C is expanded in two stages such that expansion work is maximum. The air is reheated to 750°C after the first state. Determine the cycle thermal efficiency, the work ratio and the net shaft work per kg of air. The efficiencies may be assumed to be 80% and 85% for the compressor and turbine respectively.e) Air enters the compressor of a gas turbinearrow_forward
- On my online homework, it says the answer for part b, 993.2 kW and part c, 360.06 are incorrect. I also need help with part d. The figure below provides steady-state operating data for a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 1.5 MPa, 280°C, enters a two-stage turbine with a mass flow rate of m1 = 2 kg/s. A fraction of the total flow, y = 0.15, is extracted between the two stages at 0.2 MPa to provide for building heating, and the remainder expands through the second stage to the condenser pressure of 0.1 bar. Condensate returns from the campus buildings at 0.1 MPa, 60°C and passes through a trap into the condenser, where it is reunited with the main feedwater flow. Saturated liquid leaves the condenser at 0.1 bar.arrow_forward5. A steam engine develops 45 BHP with dry saturated steam at 1.03425 MPa and exhaust at 0.12411 MPa. Steam consumption is 750 kg/hr. Calculate the thermal efficiency of equivalent Rankine Engine, in percent.arrow_forwardSteam enters the turbine of a power plant operating on the Rankine cycle (Fig. 2) at 873.15 Kand exhausts at 30 kPa. To show the effect of boiler pressure on the performance of the cycle,calculate the thermal efficiency of the cycle and the quality of the exhaust steam from theturbine for boiler pressures of 5000,7500, and 10 000 kPa. #Chemical Engineering #Chemical #Thermodynamicsarrow_forward
- 6.7 A gas engine-based trigeneration plant delivers heat and power at the fol- lowing rates: • 90 kJ/s of heat for water heating and 110 kW of electricity over 12 h (5) a day 110 kW of electricity and 100 kJ/s of heat for absorption cooling over 12 h (t,) a day Plant overall efficiency in heating and power generation mode is EUF, = 87%, which in cooling and power generation mode is EUF, = 75%. The fuel in the gas engine is natural gas with an LHV of 49 MJ/kg. Calculate (i) the total useful energy production by the trigeneration plant in a day, (ii) the trigeneration plant average EUF value, and (iii) the monthly fuel energy and fuel requirements of the trigeneration plant.arrow_forwardThe displacement volume of an internal combustron engine is 5.6 liters. The processes within each cylinder of the engine are modeled as an air-standard Diesel cycle with a cutoff ratio ß of 2.4. The state of the air at the beginning of compression is fixed by P 95 kPa, T= liters. For air, take specific heat ratio y 1.4, and R 0.287 kJ kg.K. Determine the net work per cycle, in kl. //int find the temperatures at all states and apply Ocycle= Weycle) b. If the net work per cycle is equal to 4.78 kJ. determine the indicated mean effeetive pressure in kPa, Determine the thermal efficiency. d. Determine the power developed by the engine, in kW, if the cycle is executed 1500 times 27°C, and V = 6.0 a. C. per minarrow_forward) In an open cycle Gas turbine plant, air enters the compressor at 1 bar and 27° C. The pressure of air after compression is 4 bar. The A/F ratio is 140:1. The isentropic efficiencies of compressor and turbine are 82 % & 88% respectively. Find the net power developed and the thermal efficiency of the cycle if air flow rate is 1 kg/s. Take C.V. of fuel as 42000 kJ/kg, Cp for air and gas= 1 kJ/kg.K. and γ= 1.4 for air and gas. Sketch the cycle on T-s and p-v planesarrow_forward
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