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Question 4 125 pointsl An industrial facility needs power as well as heat for process application....
An insulated steam turbine receives 30 kg of steam per second at 3 MPa, 350 °C....
An insulated steam turbine receives 30 kg of steam per second at 3 MPa, 350 °C. At the point in the turbine where the pressure is 0.5 MPa, steam is bled off for processing equipment at the rate of 5 kg/s. The temperature of this steam is 200 °C. The balance of the steam leaves the turbine at 15 kPa, 90% quality. Determine the exergy per kilogram of the steam entering and at both points at which steam leaves the...
A cogeneration plant is similar to a power plant, but some of the thermal energy in the working fluid is used for process heat
A cogeneration plant is similar to a power plant, but some of the thermal energy in the working fluid is used for process heat (for example heating buildings, steel making, or oil refining). An ideal reheat Rankine cycle with regeneration is modified to a cogeneration plant by adding a process heater as shown in the figure below. The process heater acts as a heat removal step where the enthalpy of the steam is reduced by the heat output (qprocess=h7-h3). The...
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....
Thermodynamics A steam power plant operates with high pressure oft 4 MPa and hasleel receiving heat from a 700°C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor m...
Thermodynamics
A steam power plant operates with high pressure oft 4 MPa and hasleel receiving heat from a 700°C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor mixture in the condenser at 60°C. All components are ideal i.e., reversible) except the turbine which has an efficiency 92% of a reversible, isentropic process. Other than the irreversibility of the turbine, the power plant can be considered as a Rankine cycle. Determine the following quantities in the suggested...
In Geothermal-steam power cycle, the source of heat is the hot water from well. The heat...
In Geothermal-steam power cycle, the source of heat is the hot
water from well. The heat exchanger receive hot water at Tg1= 105
oC and the water leaves at 40 oC as shown in Figure 3. Steam exits
the boiler at 40 bar, 300 oC, and it exits the turbine at 1 bar.
Saturated liquid water exits the condenser at 1 bar. The plant
operate to generate 20 MW electric power with generator efficiency
of 0.95. The isentropic efficiency of...
Question 3 [30 marks] A reheat Rankine cycle is designed for a steam power plant. Steam...
Question 3 [30 marks] A reheat Rankine cycle is designed for a steam power plant. Steam enters both the high- and low- pressure turbines at 600oC. The maximum and minimum pressures of the cycle are 20 MPa and 20 kPa, respectively. Steam leaves the condenser as a saturated liquid. The moisture content of the steam at the exit of the low-pressure turbine is 4% if the actual expansion process is adiabatic; 8.5% if the ideal expansion process is isentropic. The...
Steam with the mass flow rate of 0.75 kg/s enters an adiabatic turbine steadily at 19 MPa, 600°C and 150 m/s
Steam with the mass flow rate of 0.75 kg/s enters an adiabatic turbine steadily at 19 MPa, 600°C and 150 m/s, and leaves at 150 kPa and 350 m/s. The isentropic efficiency of the turbine is 85%. Neglect potential energy. (I) Determine the exit temperature of the steam, and its quality (if saturated mixture) (ii) Calculate the actual power output of the turbine, in kW (iii) Illustrate a T-s diagram with respect to saturation lines for the isentropic process by clearly indicating all pressure, temperature,...
Consider a regenerative vapor power cycle with two feedwater heaters, a closed one and an open...
Consider a regenerative vapor power cycle with two feedwater heaters, a closed one and an open one, and reheat. Steam enters the first turbine stage at 12 MPa, 480°C, and expands to 2 MPa. Some steam is extracted at 2 MPa and fed to the closed feedwater heater. The remainder is reheated at 2 MPa to 440°C and then expands through the second-stage turbine to 0.3 MPa, where an additional amount is extracted and fed into the open feedwater heater...
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...
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...
An insulated steam turbine receives 30 kg of steam per second at 3 MPa, 350 °C. At the point in the turbine where the pressure is 0.5 MPa, steam is bled off for processing equipment at the rate of 5 kg/s. The temperature of this steam is 200 °C. The balance of the steam leaves the turbine at 15 kPa, 90% quality. Determine the exergy per kilogram of the steam entering and at both points at which steam leaves the...
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....
Thermodynamics
A steam power plant operates with high pressure oft 4 MPa and hasleel receiving heat from a 700°C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor mixture in the condenser at 60°C. All components are ideal i.e., reversible) except the turbine which has an efficiency 92% of a reversible, isentropic process. Other than the irreversibility of the turbine, the power plant can be considered as a Rankine cycle. Determine the following quantities in the suggested...
In Geothermal-steam power cycle, the source of heat is the hot
water from well. The heat exchanger receive hot water at Tg1= 105
oC and the water leaves at 40 oC as shown in Figure 3. Steam exits
the boiler at 40 bar, 300 oC, and it exits the turbine at 1 bar.
Saturated liquid water exits the condenser at 1 bar. The plant
operate to generate 20 MW electric power with generator efficiency
of 0.95. The isentropic efficiency of...
Consider a regenerative vapor power cycle with two feedwater heaters, a closed one and an open one, and reheat. Steam enters the first turbine stage at 12 MPa, 480°C, and expands to 2 MPa. Some steam is extracted at 2 MPa and fed to the closed feedwater heater. The remainder is reheated at 2 MPa to 440°C and then expands through the second-stage turbine to 0.3 MPa, where an additional amount is extracted and fed into the open feedwater heater...
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...
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...
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