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Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow...
10-58) An air preheater for a power plant consists of a cross-flow heat exchanger with hot...
10-58) An air preheater for a power plant consists of a cross-flow heat exchanger with hot exhaust gases used to heat incoming air at I atm and 300 K. The gases enter at 375°C with a flow rate of 5 kg/s. The airflow rate is 5.0 kg/s, and the heat exchanger has A = 110 m2 and U = 50 W/m2 oC. Calculate the heat-transfer rate and exit temperatures for two cases, both fluids unmixed and one fluid mixed. Assume...
please do 11.33 11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat...
please do 11.33
11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s. The exhaust gases, hav- ing thermophysical properties similar to air, enter and exit the exchanger at 225 and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m2.K, estimate the required surface area. 11.33 Consider the fluid conditions and overall heat transfer coefficient of Problem 11.32 for a concentric tube heat...
A combined gas-steam power plant uses a simple gas turbine for the topping cycle and a...
A combined gas-steam power plant uses a simple gas turbine for
the topping cycle and a simple Rankine cycle for the bottoming
cycle. Atmospheric air enters the compressor at 101 kPa and 20 °C,
and the maximum gas cycle temperature is 1100 °C. The
compressor pressure ratio is 8. The gas stream leaves the heat
exchanger at the saturation temperature of the steam flowing
through the heat exchanger. Steam enters the heat exchanger at a
pressure of 6 MPa and...
4. A Cross-Flow Air-to-Water Heat Exchanger with an effectiveness of 0.58 is used to heat water, ...
4. A Cross-Flow Air-to-Water Heat Exchanger with an effectiveness of 0.58 is used to heat water, entering at 20°C at a rate of 4 kg/s, using hot air, entering at 127oC at a rate of 10 kg/s. The Overall Heat Transfer Coefficient for the Heat exchanger is 275 W/m'K. Assuming both fluids are unmixed, determine; (i) The Heat Capacity rates for both the air and the water (ii) The heat transfer surface area. ii) The exit temperature of the water...
An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water,...
An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water, which has a flow rate of 0.045 kg/s, enters the radiator at 400 K and is to leave at 330 K. The water is cooled by air that enters at 0.75 kg/s and 300 K. If the overall heat transfer coefficient is 220 W/m2.K, what is the required heat transfer surface area, in mº? Assume that T =320 K when evaluating the properties of...
An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water,...
An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water, which has a flow rate of 0.055 kg/s, enters the radiator at 400 K and is to leave at 330 K. The water is cooled by air that enters at 0.75 kg/s and 300 K. If the overall heat transfer coefficient is 180 W/m2.K, what is the required heat transfer surface area, in m?? Assume that TC,0 = 320K when evaluating the properties of...
Problem 11.047 It is proposed that the exhaust gas from a natural gas-powered electric generation...
please help with all steps. TIA
Problem 11.047 It is proposed that the exhaust gas from a natural gas-powered electric generation plant be used to generate steam in a shell-and-tube heat exchanger with one shell and one tube pass. The steel tubes have a thermal conductivity of 40 W/m.K, an inner diameter of 52 mm, and a wall thickness of 4 mm. The exhaust gas, whose flow rate is 2 kg/s enters the heat exchanger at 400°C and must leave...
The figure shows a schematic of a power plant that has two steam turbines. The water...
The figure shows a schematic of a power plant that has two steam turbines. The water (the working fluid for the plant) leaves the high pressure turbine (HPT) as saturated vapour at 1000 [kPa]. Part of this flow is diverted to an insulated heat exchanger, which we hot airstream to create superheated steam that enters the low pressure turbine (LPT). The air mas flow rate is 19.5 k/s and the air temperature drops from 1100 to 6001 as it goes...
A combined gas–steam power plant has been designed with a net power output of 450 MW....
A combined gas–steam power plant has been designed with a net power output of 450 MW. The pressure ratio of the gas-turbine cycle is 14. Air enters the compressor at 300 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 8 MPa to 400 C in a heat exchanger. The combustion gases leave the heat exchanger at 460 K. An open feedwater heater incorporated with the steam cycle...
The figure shows a schematic of a power plant that has two steam turbines. The water...
The figure shows a schematic of a power plant that has two steam turbines. The water (the working fluid for the plant) leaves the high pressure turbine (HPT) as saturated vapour at 1000 [kPa]. Part of this flow is diverted to an insulated heat exchanger, which uses a hot air stream to create superheated steam that enters the low pressure turbine (LPT). The air mass flow rate is me=19.5 kg/s) and the air temperature drops from 1100 to 600°Cas it...
10-58) An air preheater for a power plant consists of a cross-flow heat exchanger with hot exhaust gases used to heat incoming air at I atm and 300 K. The gases enter at 375°C with a flow rate of 5 kg/s. The airflow rate is 5.0 kg/s, and the heat exchanger has A = 110 m2 and U = 50 W/m2 oC. Calculate the heat-transfer rate and exit temperatures for two cases, both fluids unmixed and one fluid mixed. Assume...
please do 11.33
11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s. The exhaust gases, hav- ing thermophysical properties similar to air, enter and exit the exchanger at 225 and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m2.K, estimate the required surface area. 11.33 Consider the fluid conditions and overall heat transfer coefficient of Problem 11.32 for a concentric tube heat...
A combined gas-steam power plant uses a simple gas turbine for
the topping cycle and a simple Rankine cycle for the bottoming
cycle. Atmospheric air enters the compressor at 101 kPa and 20 °C,
and the maximum gas cycle temperature is 1100 °C. The
compressor pressure ratio is 8. The gas stream leaves the heat
exchanger at the saturation temperature of the steam flowing
through the heat exchanger. Steam enters the heat exchanger at a
pressure of 6 MPa and...
4. A Cross-Flow Air-to-Water Heat Exchanger with an effectiveness of 0.58 is used to heat water, entering at 20°C at a rate of 4 kg/s, using hot air, entering at 127oC at a rate of 10 kg/s. The Overall Heat Transfer Coefficient for the Heat exchanger is 275 W/m'K. Assuming both fluids are unmixed, determine; (i) The Heat Capacity rates for both the air and the water (ii) The heat transfer surface area. ii) The exit temperature of the water...
An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water, which has a flow rate of 0.045 kg/s, enters the radiator at 400 K and is to leave at 330 K. The water is cooled by air that enters at 0.75 kg/s and 300 K. If the overall heat transfer coefficient is 220 W/m2.K, what is the required heat transfer surface area, in mº? Assume that T =320 K when evaluating the properties of...
An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water, which has a flow rate of 0.055 kg/s, enters the radiator at 400 K and is to leave at 330 K. The water is cooled by air that enters at 0.75 kg/s and 300 K. If the overall heat transfer coefficient is 180 W/m2.K, what is the required heat transfer surface area, in m?? Assume that TC,0 = 320K when evaluating the properties of...
please help with all steps. TIA
Problem 11.047 It is proposed that the exhaust gas from a natural gas-powered electric generation plant be used to generate steam in a shell-and-tube heat exchanger with one shell and one tube pass. The steel tubes have a thermal conductivity of 40 W/m.K, an inner diameter of 52 mm, and a wall thickness of 4 mm. The exhaust gas, whose flow rate is 2 kg/s enters the heat exchanger at 400°C and must leave...
The figure shows a schematic of a power plant that has two steam turbines. The water (the working fluid for the plant) leaves the high pressure turbine (HPT) as saturated vapour at 1000 [kPa]. Part of this flow is diverted to an insulated heat exchanger, which we hot airstream to create superheated steam that enters the low pressure turbine (LPT). The air mas flow rate is 19.5 k/s and the air temperature drops from 1100 to 6001 as it goes...
The figure shows a schematic of a power plant that has two steam turbines. The water (the working fluid for the plant) leaves the high pressure turbine (HPT) as saturated vapour at 1000 [kPa]. Part of this flow is diverted to an insulated heat exchanger, which uses a hot air stream to create superheated steam that enters the low pressure turbine (LPT). The air mass flow rate is me=19.5 kg/s) and the air temperature drops from 1100 to 600°Cas it...
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