The exhaust gases from a furnace, which has a temperature of 430ºC, which would be the...
The exhaust gases from a furnace, which has a temperature of 430ºC, which would be the exergy of these gases assuming that the ambient temperature is 25ºC and the rate of energy exiting through the gases is 83 kW.
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The exhaust gases from a furnace, which has a temperature of 430ºC, which would be the...
Problem 11.051 Exhaust gas from a furnace is used to preheat the combustion air supplied to...
Problem 11.051 Exhaust gas from a furnace is used to preheat the combustion air supplied to the furnace burners. The gas, which has a flow rate of 15 kg/s and an inlet temperature of 1100 K, passes through a bundle of tubes, while the air, which has a flow rate of 10 kg/s and an inlet temperature of 300 K, is in cross flow over the tubes. The tubes are unfinned, and the overall heat transfer coefficient is 90 W/m2...
this is the question and From ex.5. the energy by burning of the fuel Q'_H=333 KW Q'_L= 233KW(where thermal...
this is the question and
From ex.5.
the energy by burning of the fuel Q'_H=333 KW
Q'_L= 233KW(where thermal efficiency is 30%)
8.1 Exergy in a car engine int a Find the exergy delivered by burning of the fuel at 1800K in the car for Ex. 5.1. Also find the rate of exergy going out with the exhaust flow at 750 K assuming it is half the low temperature heat rejection and that of the other half is heat transfer...
You are in charge of a combustion furnace. The furnace is fed an air stream and...
You are in charge of a combustion furnace. The furnace is fed an air stream and a methane stream which is combusted to produce heat that is used to boil water and produce steam for your plant. The combustion of fuels using an air stream which contains nitrogen generally produces significant amounts of NO, compounds which are an air pollutant, so the exhaust gases must generally be removed through various processes. In this case, your furnace exhaust is passed through...
The exhaust gases at the turbine exit always have higher temperature than the temperature after gas...
The exhaust gases at the turbine exit always have higher temperature than the temperature after gas compressions is a compressor what would happen if above is not the case?
P, = 1.3 MPa T,-527℃ V1 = 40 m/s 4,=0.2 m 2 3. Hot exhaust gases...
P, = 1.3 MPa T,-527℃ V1 = 40 m/s 4,=0.2 m 2 3. Hot exhaust gases flow steadily through a turbine with inlet and outlet states as shown. Heat is lost to the surroundings at a rate of 500 kW. Treat the exhaust gases as air and using Table A-17, find the following: a) The mass flow rate through the turbine, [kg/s] b) The Power output of the turbine, Wout [MW] Turbine Wout owE P,-100 kPa T2= 127℃ V2- 52...
Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow...
Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow heat exchanger. The exhaust gases enter the heat exchanger at 450°C and leave at 200°C. The air enters the heat exchanger at 70°C, leaves at 250°C, and has a mass flow rate of 10 kg/s. Assume the properties of the exhaust gases can be approximated by those of air. The overall heat transfer coefficient of the heat exchanger is 154 W/m2 K. Calculate the...
(b) Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400 to 120°C by w...
(b) Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400 to 120°C by water initially at 10°C. The specific heat capacity of the exhaust gases and water may be taken as 1.13 and 4.19 kJ/kg°C, respectively, and the overall heat transfer coefficient from gases to water is 140 W/m2°C. Calculate the surface area required when the water flow rate is 0.4 kg/s for (6 marks) (4 marks) (i) (ii) Parallel flow...
TOPIC: NORMAL STATIONARY SHOCKS 3. Exhaust gases from a rocket engine have MW 14 kg/kmol. Assume...
TOPIC: NORMAL STATIONARY SHOCKS 3. Exhaust gases from a rocket engine have MW 14 kg/kmol. Assume them to be perfect gas with y = 1.25. These gases are accelerated through a converging-diverging nozzle. A normal shock occurs at a section where M 2.0. Find pressure, temperature, density and stagnation pressure ratio across this shock wave
#1. To reduce nitrogen oxide emissions from a diesel engine, one commonly used strategy is exhaust...
#1. To reduce nitrogen oxide emissions from a diesel engine, one commonly used strategy is exhaust gas recirculation (EGR). In a stack-type EGR cooler, exhaust gases flow through tubes with a rectangular cross-section (4 mm x 6 mm). In each tube, the mass flow rate of exhaust gases is 0.0001 kg/s; the gases enter at 140°C while the inner surface of each tube is maintained at 80°C due to water being circulated as a coolant. The length of the tube...
Combined Gas and Steam Power Plant The highest temperature at the inlet of a gas turbine...
Combined Gas and Steam Power Plant The highest temperature at the inlet of a gas turbine can be 1600oC. The temperature of the ambient air is 27oC. Determine the maximum pressure ratio and the associated efficiency. Determine the conditions (temperatures and pressure) at the various points of the cycle. What’s the maximum temperature of the exhaust gases? Determine the amount of natural gas required for a 500 MW plant. Determine the associated emissions. What’s the total amount of exhaust gas?...
Problem 11.051 Exhaust gas from a furnace is used to preheat the combustion air supplied to the furnace burners. The gas, which has a flow rate of 15 kg/s and an inlet temperature of 1100 K, passes through a bundle of tubes, while the air, which has a flow rate of 10 kg/s and an inlet temperature of 300 K, is in cross flow over the tubes. The tubes are unfinned, and the overall heat transfer coefficient is 90 W/m2...
this is the question and
From ex.5.
the energy by burning of the fuel Q'_H=333 KW
Q'_L= 233KW(where thermal efficiency is 30%)
8.1 Exergy in a car engine int a Find the exergy delivered by burning of the fuel at 1800K in the car for Ex. 5.1. Also find the rate of exergy going out with the exhaust flow at 750 K assuming it is half the low temperature heat rejection and that of the other half is heat transfer...
You are in charge of a combustion furnace. The furnace is fed an air stream and a methane stream which is combusted to produce heat that is used to boil water and produce steam for your plant. The combustion of fuels using an air stream which contains nitrogen generally produces significant amounts of NO, compounds which are an air pollutant, so the exhaust gases must generally be removed through various processes. In this case, your furnace exhaust is passed through...
The exhaust gases at the turbine exit always have higher temperature than the temperature after gas compressions is a compressor what would happen if above is not the case?
P, = 1.3 MPa T,-527℃ V1 = 40 m/s 4,=0.2 m 2 3. Hot exhaust gases flow steadily through a turbine with inlet and outlet states as shown. Heat is lost to the surroundings at a rate of 500 kW. Treat the exhaust gases as air and using Table A-17, find the following: a) The mass flow rate through the turbine, [kg/s] b) The Power output of the turbine, Wout [MW] Turbine Wout owE P,-100 kPa T2= 127℃ V2- 52...
Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow heat exchanger. The exhaust gases enter the heat exchanger at 450°C and leave at 200°C. The air enters the heat exchanger at 70°C, leaves at 250°C, and has a mass flow rate of 10 kg/s. Assume the properties of the exhaust gases can be approximated by those of air. The overall heat transfer coefficient of the heat exchanger is 154 W/m2 K. Calculate the...
(b) Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400 to 120°C by water initially at 10°C. The specific heat capacity of the exhaust gases and water may be taken as 1.13 and 4.19 kJ/kg°C, respectively, and the overall heat transfer coefficient from gases to water is 140 W/m2°C. Calculate the surface area required when the water flow rate is 0.4 kg/s for (6 marks) (4 marks) (i) (ii) Parallel flow...
TOPIC: NORMAL STATIONARY SHOCKS 3. Exhaust gases from a rocket engine have MW 14 kg/kmol. Assume them to be perfect gas with y = 1.25. These gases are accelerated through a converging-diverging nozzle. A normal shock occurs at a section where M 2.0. Find pressure, temperature, density and stagnation pressure ratio across this shock wave
#1. To reduce nitrogen oxide emissions from a diesel engine, one commonly used strategy is exhaust gas recirculation (EGR). In a stack-type EGR cooler, exhaust gases flow through tubes with a rectangular cross-section (4 mm x 6 mm). In each tube, the mass flow rate of exhaust gases is 0.0001 kg/s; the gases enter at 140°C while the inner surface of each tube is maintained at 80°C due to water being circulated as a coolant. The length of the tube...
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