A quantity of water is heated with steam of 5 bar from a temperature of 35oC...
A quantity of water is heated with steam of 5 bar from a temperature of 35oC to 100oC over a period of 1200 s. The mass of water is 50 kg and the Cp for water is 4.19 kJ/kg.oC. Find the amount of steam required for this process.
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A quantity of water is heated with steam of 5 bar from a
temperature of 35oC...
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...
The wet steam at pressure 5 MPa and quality x = 90 % is adiabatically and...
The wet steam at pressure 5 MPa and quality x = 90 % is adiabatically and reversibly decompressed to 0.5 MPa in a screw expander. Mass flow rate of steam equals to 5 kg/s. Find the final quality of the steam and the power generated in the expander. Neglect changes in kinetic and potential energies of inlet and outlet streams. Assume specific heat of water equal to 4.19 kJ/kg/K. Draw the process on the T-s diagram. The data required for...
5. A steam turbine operates with an inlet condition of 30 bar, 400 °C, 160 m/s...
5. A steam turbine operates with an inlet condition of 30 bar, 400 °C, 160 m/s and an outlet state of a saturated vapour at 0.7 bar with a velocity of 100 m/s. The mass flow rate is 1200 kg/min and the power output is 10800 kW. Present the process on the T-v diagram. Determine the magnitude and direction of the heat-transfer rate in kJ/min if the potential energy change in negligible.
A quantity of frozen water (also called ice) of mass 0.0360 kg is initially at a...
A quantity of frozen water (also called ice) of mass 0.0360 kg is initially at a temperature of -4.000 C. It undergoes a series of physical changes at atmospheric pressure. The specific heat of ice is 2090 J/kg.°C The specific heat of water is 4186 J/kg.°C The specific heat of steam is 2010 J/kg.°C. The heat of fusion of water is 3.33 105 J/kg. The heat of vaporization of water is 2.26 106 J/kg. (a) Calculate the amount of heat...
Consider a Rankine cycle operating between 1.013 bar and 100 bar with a maximum superheated steam...
Consider a Rankine cycle operating between 1.013 bar and 100 bar
with a maximum superheated steam temperature of 500ºC.
(a) Explain why H2-H1 is approximated as
zero?
(b) Explain why (PV) points within the dashed lines have a set
temperature that is determined by pressure.
(c) How much steam has condensed in the adiabatic cooling step?
Give you answer as a fractional mass.
(d) How much heat per kg is removed by the condenser in 4→1?
(e) How much heat...
Steam is supplied to a turbine and exhausts at 0.1 bar, saturated. The mass flow rate of steam is 8.33 kg/s. The seawat...
Steam is supplied to a turbine and exhausts at 0.1 bar, saturated. The mass flow rate of steam is 8.33 kg/s. The seawater enters the condenser at 25°C and leaves at 42°C. Find the mass of cooling water circulated per hour. Take the specific heat capacity of the sea water as 4.2 kJ/kgK. Qmc(t2 and Qsteam=Qcooling water (hint: use
Steam is supplied to a turbine and exhausts at 0.1 bar, saturated. The mass flow rate of steam is 8.33 kg/s....
A steam power plant equipped with an open feed water heater as well as reheat arrangement,...
A steam power plant equipped with an open feed water heater as well as reheat arrangement, as shown in figure 1, supplies 50 kg/s of steam at 80 bar 470°C to the H.P. turbine. For feed heating, a part of steam is extracted at 7 bar and the remainder of the steam is reheated to 350°C in a reheater and then expanded in L.P. turbine down to 0.035 bar. The isentropic efficiency of both turbines is 0.85: (a) Plot the...
In large steam power plants, the feedwater is frequently heated in a closed feedwater heater by...
In large steam power plants, the feedwater is frequently heated in a closed feedwater heater by using steam extracted from the turbine at some stage. Steam enters the feedwater heater at 1 MPa and 215°C and leaves as saturated liquid at the same pressure. Feedwater enters the heater at 2.5 MPa and 50°C and leaves at 10°C below the exit temperature of the steam. Determine the ratio of the mass flow rates of the extracted steam and the feedwater. The...
Activity 11 - Review for Midterm Steam at a pressure of 9 bar (hf = 743...
Activity 11 - Review for Midterm Steam at a pressure of 9 bar (hf = 743 kJ/kg , hfg = 2031 kJ/kg) is generated in an exhaust gas boiler from feed water at 80*C (h = 334.9 kJ/kg). If the dryness fraction of the steam is 0.96, determine the heat transfer per kilogram of steam. If wet saturated steam at 8 bar (hfg = 2048 kJ/kg) requires 82 kJ of het per kg of steam to completely dry it, what...
Question 4 A steam power plant equipped with an open feed water heater as well as...
Question 4 A steam power plant equipped with an open feed water heater as well as reheat arrangement, as shown in figure 1, supplies 50 kg/s of steam at 80 bar 470°C to the H.P. turbine. For feed heating, a part of steam is extracted at 7 bar and the remainder of the steam is reheated to 350°C in a reheater and then expanded in L.P. turbine down to 0.035 bar. The isentropic efficiency of both turbines is 0.85: A....
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...
The wet steam at pressure 5 MPa and quality x = 90 % is adiabatically and reversibly decompressed to 0.5 MPa in a screw expander. Mass flow rate of steam equals to 5 kg/s. Find the final quality of the steam and the power generated in the expander. Neglect changes in kinetic and potential energies of inlet and outlet streams. Assume specific heat of water equal to 4.19 kJ/kg/K. Draw the process on the T-s diagram. The data required for...
5. A steam turbine operates with an inlet condition of 30 bar, 400 °C, 160 m/s and an outlet state of a saturated vapour at 0.7 bar with a velocity of 100 m/s. The mass flow rate is 1200 kg/min and the power output is 10800 kW. Present the process on the T-v diagram. Determine the magnitude and direction of the heat-transfer rate in kJ/min if the potential energy change in negligible.
A quantity of frozen water (also called ice) of mass 0.0360 kg is initially at a temperature of -4.000 C. It undergoes a series of physical changes at atmospheric pressure. The specific heat of ice is 2090 J/kg.°C The specific heat of water is 4186 J/kg.°C The specific heat of steam is 2010 J/kg.°C. The heat of fusion of water is 3.33 105 J/kg. The heat of vaporization of water is 2.26 106 J/kg. (a) Calculate the amount of heat...
Consider a Rankine cycle operating between 1.013 bar and 100 bar
with a maximum superheated steam temperature of 500ºC.
(a) Explain why H2-H1 is approximated as
zero?
(b) Explain why (PV) points within the dashed lines have a set
temperature that is determined by pressure.
(c) How much steam has condensed in the adiabatic cooling step?
Give you answer as a fractional mass.
(d) How much heat per kg is removed by the condenser in 4→1?
(e) How much heat...
Steam is supplied to a turbine and exhausts at 0.1 bar, saturated. The mass flow rate of steam is 8.33 kg/s. The seawater enters the condenser at 25°C and leaves at 42°C. Find the mass of cooling water circulated per hour. Take the specific heat capacity of the sea water as 4.2 kJ/kgK. Qmc(t2 and Qsteam=Qcooling water (hint: use
Steam is supplied to a turbine and exhausts at 0.1 bar, saturated. The mass flow rate of steam is 8.33 kg/s....
A steam power plant equipped with an open feed water heater as well as reheat arrangement, as shown in figure 1, supplies 50 kg/s of steam at 80 bar 470°C to the H.P. turbine. For feed heating, a part of steam is extracted at 7 bar and the remainder of the steam is reheated to 350°C in a reheater and then expanded in L.P. turbine down to 0.035 bar. The isentropic efficiency of both turbines is 0.85: (a) Plot the...
Activity 11 - Review for Midterm Steam at a pressure of 9 bar (hf = 743 kJ/kg , hfg = 2031 kJ/kg) is generated in an exhaust gas boiler from feed water at 80*C (h = 334.9 kJ/kg). If the dryness fraction of the steam is 0.96, determine the heat transfer per kilogram of steam. If wet saturated steam at 8 bar (hfg = 2048 kJ/kg) requires 82 kJ of het per kg of steam to completely dry it, what...
Question 4 A steam power plant equipped with an open feed water heater as well as reheat arrangement, as shown in figure 1, supplies 50 kg/s of steam at 80 bar 470°C to the H.P. turbine. For feed heating, a part of steam is extracted at 7 bar and the remainder of the steam is reheated to 350°C in a reheater and then expanded in L.P. turbine down to 0.035 bar. The isentropic efficiency of both turbines is 0.85: A....
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