11.2 In a CAES for a 150-MW peaking compressor/gas turbine facility, the two-stage compressor operates with air intake at 20°C and 1 bar and air discharge at 49 bars. Air IC occurs at a pressure of 7 bars back to the intake temperature. The compressed-air storage cavern charging period duration is 5 h. The HP portion of the gas turbine operates with a CC that burns natural gas with an HV of 50 MJ/kg; thereby, the compressed-air temperature increases to 1100°C. After expansion in the HP part of the turbine to a pressure of 7 bars, the gas is reheated to 1100°C. Subsequently, the air expands in the LP part of the turbine to the pressure of 1 bar. The isentropic efficiencies of compressor and turbine are 0.86 and 0.89, respec- tively. The isobaric specific heat of air/gas is 1.05 kJ/(kg K), the isentropic exponent k is 1.4. Determine (a) the total fuel consumption rate of combus- tor and reheater, (b) the storage cavern volume, and (c) the average air flow rate during the 5-h cavern charging period.

11.2 In a CAES for a 150-MW peaking compressor/gas turbine facility, the two-stage compressor operates with air intake at 20°C and 1 bar and air discharge at 49 bars. Air IC occurs at a pressure of 7 bars back to the intake temperature. The compressed-air storage cavern charging period duration is 5 h. The HP portion of the gas turbine operates with a CC that burns natural gas with an HV of 50 MJ/kg; thereby, the compressed-air temperature increases to 1100°C. After expansion in the HP part of the turbine to a pressure of 7 bars, the gas is reheated to 1100°C. Subsequently, the air expands in the LP part of the turbine to the pressure of 1 bar. The isentropic efficiencies of compressor and turbine are 0.86 and 0.89, respec- tively. The isobaric specific heat of air/gas is 1.05 kJ/(kg K), the isentropic exponent k is 1.4. Determine (a) the total fuel consumption rate of combus- tor and reheater, (b) the storage cavern volume, and (c) the average air flow rate during the 5-h cavern charging period.

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

See similar textbooks

Similar questions

Determine: a)Work of the compressor(kW) b)COP of the cycle
A compound compression system below, Sketch (ph) diagram for cycle and calculate : 1. Total compressor work. 2. Q condenser 3. Enthalpy drops of refrigerant after sub-cooler 3 Water inter cooler Refrigerant (working fluid) R717 Low Cycle Pressure 1.8 bar Intermediate Cycle Pressure 4 bar T3= 40 °C Low stage compressor High stage compressor Ts= 50 °C Evaporator Qwraporation=1130 kJ/kg Expansion valve Condenser Sub-cooler
In an ideal gas refrigeration cycle, helium enters the compressor at a temperature of 15 ̊C and a pressure of 100 kPa and leaves at a pressure of 300 kPa. The temperature of helium at the turbine inlet is 30 ̊C. Assuming that the isentropic efficiency of the compressor and turbine is 80%; Calculate a) the lowest and highest temperatures of the cycle, b) the efficiency coefficient of the cycle, c) the required helium flow rate for 5 kW cooling capacity
Q 4) A simple vapour compression plant produces (5 tonnes) of refrigeration. The enthalpy values at inlet to compressor, at exit from the compressor, and at exit from the condenser are (183.19, 209.41 and 74.59 kJ/kg) respectively. Determine :- (i) The refrigerant flow rate, (ii) The C.O.P. (ii) The power required to drive the compressor. (iv) The rate of heat rejection to the condenser.
In a Brayton Cycle air enters the compressor at 101.32 kPa, 32 °C and leaves at a pressure of 808 kPaa. The air is heated to 717 °C in the combustor. For a net output of 2125 kW, compute: a) mass flow rate of air (kg/s), b) thermal efficiency of the cycle. use k = 1.4 for all problems
A steam plant works on the Rankine cycle with reheat. Steam enters the turbine at 35 bar, 350°C, and expands to 10 bar, where it passes through a reheater, emerging at 350°C. It then expands to the condenser pressure of 35 kPa. For an ideal cycle, compute (a) workdone in HP and LP turbines (b) heat added in the reheater (c) pump work (d) efficiency (e) heat added in the boiler
ASAB
2.please solve
4
Q3/ In a steam power plant the high pressure turbine is fed with steam at 60 bar, 450°C and enters low pressure turbine at 3 bar with a portion of steam bled out for feed heating at this intermediate pressure. Steam finally leaves low pressure turbine at 0.05 bar for inlet to condenser. Closed feed heater raises the condensate temperature to 115°C and produces saturated liquid. Bled steam leaving closed feed heater is passed through trap to mix with condensate leaving condenser. Consider power output to be 30 MW. Determine: (a) The fraction of steam bled for feed heating. (b) The capacity of boiler in kg/hr. (c) The overall thermal efficiency of plant. (d) Give layout and T-s diagram of the cycle.