spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90
Homework Answers
Specific heat of steam: 1.996 kJ/-kgK
Heat of vaporization = 540 kcal/kg
heat removed per kg: 20*1.996 + 10*4.187 + 540 = 622 kcal/kg
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spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90
1. A 2.50 kg block of ice at 0°C is added to a picnic cooler. How...
.1. A 2.50 kg block of ice at 0°C is added to a picnic cooler. How much heat (in kcal) will the ice remove as it melts to water at 0°C? 2. A 300.0 g pot of water at room temperature (25.0°C) is placed on a stove. How much heat (in kcal) is required to change this water to steam at 100.0°C? 3. Spent steam from an electric generating plant leaves the turbines at 110.0°C and is cooled to 95.0°C liquid water...
iPad 6:32 PM * 33% Exit A 50.0 g silver spoon at 20.0°C is placed in...
iPad 6:32 PM * 33% Exit A 50.0 g silver spoon at 20.0°C is placed in a cup of coffee at 90.0°C. How much heat (in kcal) does the spoon absorb from the coffee to reach a temperature of 89.0°C? (Assume Csilver-0.056 kcal/kgC.) Question 13 1 pts A 200.0 g china serving bowl is warmed 65.0°C when it absorbs 2.6 kcal of heat from a serving of hot food. What is the specific heat of the china dish? Question 14...
3-40 In the condenser of a steam power plant the steam from the turbine enters the...
3-40 In the condenser of a steam power plant the steam from the turbine enters the condenser at 0.10 bar with a quality of 95 percent and leaves at the same pressure as a saturated liquid. The steam is condensed by transferring heat to a stream of cooling water which enters at 1.3 bars and 5°C and leaves the heat exchanger at 1.2 bars and 25°C·The environmental temperature is 5°C. Determine a. the change in stream availability (exergy) of the...
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...
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...
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...
A combined cycle power plant consists of two gas turbines; cach produces a net power of...
A combined cycle power plant consists of two gas turbines; cach produces a net power of 160 MW, and a 70 MW steam power cycle. The combustion of the fuel in the combustion chamber produces hot gases at 1400°C. The hot gases leaving the gas turbines are used to generate steam through the heat recovery steam generator (Boiler). The hot gases enter the heat recovery steam generator at 880°C and leaves at 660°C. Water enters the isentropic pump as saturated...
The condenser of a large steam power plant is a heat exchanger in which steam is...
The condenser of a large steam power plant is a heat exchanger in which steam is condensed to liquid water. Assume the condenser to be a shell-and-tube heat exchanger consisting of a single shell and 30,000 tubes, each executing two passes (see figure below). The tubes are of thin wall construction with D=25mm, and steam condenses on their outer surface with an associated convection coefficient ho=11,000W/ m K The heat transfer rate that must be effected by the heat exchanger...
BY TWO METHODS Steam at 150°C and I atm is to be condensed to 100°C and...
BY
TWO METHODS
Steam at 150°C and I atm is to be condensed to 100°C and latm using cooling water in a continuous adiabatic heat exchanger. Cooling water enters at 20°C and leaves at 40°C. For each kg of steam condensed, calculate the mass (kg) of cooling water required using two different methods.
Electrical generating plants operate by generating steam at elevated temperatures and pressures then reducing the pressure...
Electrical generating plants operate by generating steam at elevated temperatures and pressures then reducing the pressure in a turbine. As the pressure is reduced, high temperature steam expands (and cools) driving the turbine. The shaft work produced by the turbine is transferred to a generator to generate electricity. One limitation on steam turbines is that they cannot tolerate small amounts of water in its liquid state in the gases passing through the turbine. If the liquid content of the steam...
.1. A 2.50 kg block of ice at 0°C is added to a picnic cooler. How much heat (in kcal) will the ice remove as it melts to water at 0°C? 2. A 300.0 g pot of water at room temperature (25.0°C) is placed on a stove. How much heat (in kcal) is required to change this water to steam at 100.0°C? 3. Spent steam from an electric generating plant leaves the turbines at 110.0°C and is cooled to 95.0°C liquid water...
iPad 6:32 PM * 33% Exit A 50.0 g silver spoon at 20.0°C is placed in a cup of coffee at 90.0°C. How much heat (in kcal) does the spoon absorb from the coffee to reach a temperature of 89.0°C? (Assume Csilver-0.056 kcal/kgC.) Question 13 1 pts A 200.0 g china serving bowl is warmed 65.0°C when it absorbs 2.6 kcal of heat from a serving of hot food. What is the specific heat of the china dish? Question 14...
3-40 In the condenser of a steam power plant the steam from the turbine enters the condenser at 0.10 bar with a quality of 95 percent and leaves at the same pressure as a saturated liquid. The steam is condensed by transferring heat to a stream of cooling water which enters at 1.3 bars and 5°C and leaves the heat exchanger at 1.2 bars and 25°C·The environmental temperature is 5°C. Determine a. the change in stream availability (exergy) of the...
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...
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...
A combined cycle power plant consists of two gas turbines; cach produces a net power of 160 MW, and a 70 MW steam power cycle. The combustion of the fuel in the combustion chamber produces hot gases at 1400°C. The hot gases leaving the gas turbines are used to generate steam through the heat recovery steam generator (Boiler). The hot gases enter the heat recovery steam generator at 880°C and leaves at 660°C. Water enters the isentropic pump as saturated...
The condenser of a large steam power plant is a heat exchanger in which steam is condensed to liquid water. Assume the condenser to be a shell-and-tube heat exchanger consisting of a single shell and 30,000 tubes, each executing two passes (see figure below). The tubes are of thin wall construction with D=25mm, and steam condenses on their outer surface with an associated convection coefficient ho=11,000W/ m K The heat transfer rate that must be effected by the heat exchanger...
BY
TWO METHODS
Steam at 150°C and I atm is to be condensed to 100°C and latm using cooling water in a continuous adiabatic heat exchanger. Cooling water enters at 20°C and leaves at 40°C. For each kg of steam condensed, calculate the mass (kg) of cooling water required using two different methods.
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