A simple Bravton cycle operates between the pressure limits of 100 and 2000 kPa. The working fluid isair which enters the compressor at 40 "C at a rate of 4 kg/s and enters the turbine at 1400 °C. Thecompressor is ideal (i.e., n= 100%) and the turbine has an isentropic efficiency of n= 90%. For thisproblem, assume that air is an ideal gas with constant specific heats (R= 0.287 kJ/kg-K, C, = 1.005kJ/kg-K, C, = 0.718 kJ/kg-K, k= 1.4).%3D(a) Determine the net work output, in kW.(b) Determine the thermal efficiency of the cycle.HeatexchangerCompressorTurbineHeatexchangerJout

Answered: Image /qna-images/answer/ea5c5697-9531-41d0-a5a5-87e4651fc6e4.jpg

A simple Brayton cycle operates between the pressure limits of 100 and 2000 kPa. The working fluid is air. which enters the compressor at 40 °C at a rate of 4 kg/s and enters the turbine at 1400 °C. The compressor is ideal (i.e., n= 100%) and the turbine has an isentropic efficiency of = 90%. For this problem, assume that air is an ideal gas with constant specific heats (R= 0.287 kJ/kg-K. C. = 1.005 kJ/kg-K, C, 0.718 kJ/kg-K, k= 1.4). !! (a) Determine the net work output, in kW. (b) Determine the thermal efficiency of the cycle. Heat exchanger Compressor Turbine Heat exchanger

A simple Brayton cycle operates between the pressure limits of 100 and 2000 kPa. The working fluid is air. which enters the compressor at 40 °C at a rate of 4 kg/s and enters the turbine at 1400 °C. The compressor is ideal (i.e., n= 100%) and the turbine has an isentropic efficiency of = 90%. For this problem, assume that air is an ideal gas with constant specific heats (R= 0.287 kJ/kg-K. C. = 1.005 kJ/kg-K, C, 0.718 kJ/kg-K, k= 1.4). !! (a) Determine the net work output, in kW. (b) Determine the thermal efficiency of the cycle. Heat exchanger Compressor Turbine Heat exchanger

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

Consider an Otto cycle where air, having constant specific heats, is the working fluid. Show that the thermal efficiency can be expressed as: 1 n 1 rk-1 where r is the compression ratio and k = Cp/C₂. This equation suggests that thermal efficiency goes to 1 as the compression ratio becomes large. What is the practical limitation to increasing r as a means of increasingn?
The adiabatic efficiencies of the compressor and turbine used in an air-standard Brayton cycle are 85% and 90%, respectively. If the cycle operates between 14.7 and 55 psia and if the maximum and minimum temperatures are 1500 F and 80 F, respectively, compute the thermal efficiency of the cycle. Assume constant specific heats.
The compression ratio of an Otto cycle as shown in the figure below is VA/VB = 9.00. At the beginning A of the compression process, 505 cm3 of gas is at 115 kPa and 20.0°C. At the beginning of the adiabatic expansion, the temperature is TC = 725°C. Model the working fluid as an ideal gas with ? = 1.40.
An air-standard Otto cycle with a compression ratio of 9 has air entering at 101 kPa and 27°C. There is an input of 1800 kJ/kg of heat during heat addition process. Determine the thermal efficiency. Answer it completely to have great rate.
An ideal Brayton cycle has a pressure ratio of 7:1. The temperature of the air is 24 0C at the inlet to the compressor and 1,120 0C at the inlet to the turbine. Take Specific heat at constant pressure and constant volume for air as 1.006 kJ/kg K and 0.717 kJ/kg K respectively. Calculate the work ratio of the plant to three decimal places.
I need the answer as soon as possible
If one measurement is conducted in the four processes and shows that the pressure ratio (P3/P2)in the adiabatic expansion is 1.2 times the pressure ratio (P4/P1) in the adiabatic compression, can you justify if it is a Carnot engine? Please give your reason
kgK 4. An ideal Otto cycle has a compression ratio of 9. Using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 60 kW of power, k=1.4.
An ideal gas turbine cycle consisting of 2 stages of compression and 2 stages of expansion has an overall pressure ratio of 9. Air enters the compressors at the temperature of 320 K while, being intercooled between the stages. Air enters the first compressor at 100 kPa and the pressure ratio of cach of the compressors are selected in a way that minimizes the total power input for the compressors. The high-pressure turbine (First one) drives the compressors and the low-pressure one produces power output. The compressors and both the high-pressure and low-pressure turbines can be assumed ideal. To increase the efficiency of the cycle a regenerator with effectiveness of 85% is used to recover some heat from the exhaust of the second turbine. In this cycle, air with the temperature of 1400 K enters the first turbine. After expansion in the first turbine, air is reheated to the same temperature at the inlet of the first turbine (1400 K). You can consider constant specific heats of c,=1.005…
A Rankine Cycle operates at a throttle pressure and temperature of 5 MPa and 450°C, respectively. The generator produces 20 MW at an efficiency of 95% while the mechanical efficiency is 97%. The actual expansion efficiency of the turbine is 85% and the pressure of the condenser is 10 kPa. Determine the mass flow rate of steam in kg/s