Thermodynamics: Vapor Power Plant
Figure P6.165 shows a simple vapor power plant operating at steady state with water as the working fluid.
Data at key locations are given on the figure. The mass flow rate of the water circulating through the components is 109 kg/s. Stray heat transfer and kinetic and potential energy effects can be ignored. Determine
(a) the net power developed, in MW.
(b) the thermal efficiency.
(c) the isentropic turbine efficiency.
(d) the isentropic pump efficiency.
(e) the mass flow rate of the cooling water, in kg/s.
(f) the rates of entropy production, each in kW/K, for the turbine, condenser, and pump.
Homework Answers
A power plant operates on a superheat vapor power cycle with water is the working fluid....
A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%), (b) determine the heat input to the...
C. (35%) A power plant operates on a superheat vapor power cycle with water is the...
C. (35%) A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%), (b) determine the heat input...
Use engineering methodology and show units calculations. A power plant operates on a superheat vapor power...
Use engineering methodology and show units calculations.
A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%),...
Superheated steam at 20 MPa, 560oC enters the turbine of a vapor power plant. The pressure...
Superheated steam at 20 MPa, 560oC enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.7 bar, and liquid leaves the condenser at 0.4 bar at 75oC. The pressure is increased to 20.1 MPa across the pump and the specific enthalpy is 338.14 kJ/kg. The turbine isentropic efficiency is 81%. Cooling water enters the condenser at 20oC with a mass flow rate of 70.7 kg/s and exits the condenser at 38oC. For...
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10...
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10 Mpa, 560 C with a mass flow rate of 7.8kg/s and exits at 8 kPa. Saturated liquid enters the pump at 8 kPa. The isentropic turbine efficiency is 85%, and the isentropic pump efficiency is 85%. Cooling water enters the adiabatic condenser at 18 C and exits at 36 C with no significant change in pressure and assuming the specific heat of the cooling...
6.133 Figure P6.133 shows a simple vapor power cycle operating at steady state with water as...
6.133 Figure P6.133 shows a simple vapor power cycle operating at steady state with water as the working fluid Data at key locations are given on the figure. Flow through the turbine and pump occurs isentropically. Flow through the steam generator and condenser occurs at constant pressure. Stray heat transfer and kinetic and potential energy effects are negligible. Sketch the four processes of this cycle in series on a T-s diagram. Determine the thermal efficiency P 20 MPa T 700°C...
Problem 4 In the vapor power cycle shown below, steam (H20) is the working fluid. Saturated...
Problem 4 In the vapor power cycle shown below, steam (H20) is the working fluid. Saturated vapor enters the turbine at 100 bar and saturated liquid exits the condenser at a pressure of 0.1 bar. The net power output of the cycle, Weycle, is 150 MW. Isentropic efficiency of the turbine and the pump (n (hi-h2)/(h1-h2s), np=(h25-h1)/(h2-h1)) are both 80%. Determine the followings. [30 pts] (a) Thermal efficiency, n (b) Mass flow rate of the steam, m, in kg/s (c)...
Thermodynamics 1. Saturated liquid H20 at 16 MPa is fed into the boiler of a variant of a Carnot cycle (but simplified Rankin cycle) where the working fluid is not an ideal gas. Saturated H20 va...
Thermodynamics
1. Saturated liquid H20 at 16 MPa is fed into the boiler of a variant of a Carnot cycle (but simplified Rankin cycle) where the working fluid is not an ideal gas. Saturated H20 vapor is fed into the turbine of the same turbine. The condenser of this turbine is operated at 8 kPa. The mass flowrate of the H20 in this cycle is 7.2x103 kg/min. Draw the path of this process on T-s diagram. Estimate the thermal efficiency...
Steady-state operating data for a simple steam power plant are provided in figure. Kinetic and potential...
Steady-state operating data for a simple steam power plant are provided in figure. Kinetic and potential energy effects can be ignored. Determine the a) the mass flow rate of the steam, (10 pts.) b) Qin . (5 pts.) c) the mass flow rate of the cooling water, (5 pts.) d) thermal efficiency, (5 pts.) e) What happens to the thermal efficiency if we increase the turbine inlet pressure while keeping the inlet temperature (TI) constant? Explain it clearly. (10 pts.)...
A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%), (b) determine the heat input to the...
C. (35%) A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%), (b) determine the heat input...
Use engineering methodology and show units calculations.
A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%),...
6.133 Figure P6.133 shows a simple vapor power cycle operating at steady state with water as the working fluid Data at key locations are given on the figure. Flow through the turbine and pump occurs isentropically. Flow through the steam generator and condenser occurs at constant pressure. Stray heat transfer and kinetic and potential energy effects are negligible. Sketch the four processes of this cycle in series on a T-s diagram. Determine the thermal efficiency P 20 MPa T 700°C...
Problem 4 In the vapor power cycle shown below, steam (H20) is the working fluid. Saturated vapor enters the turbine at 100 bar and saturated liquid exits the condenser at a pressure of 0.1 bar. The net power output of the cycle, Weycle, is 150 MW. Isentropic efficiency of the turbine and the pump (n (hi-h2)/(h1-h2s), np=(h25-h1)/(h2-h1)) are both 80%. Determine the followings. [30 pts] (a) Thermal efficiency, n (b) Mass flow rate of the steam, m, in kg/s (c)...
Thermodynamics
1. Saturated liquid H20 at 16 MPa is fed into the boiler of a variant of a Carnot cycle (but simplified Rankin cycle) where the working fluid is not an ideal gas. Saturated H20 vapor is fed into the turbine of the same turbine. The condenser of this turbine is operated at 8 kPa. The mass flowrate of the H20 in this cycle is 7.2x103 kg/min. Draw the path of this process on T-s diagram. Estimate the thermal efficiency...
Steady-state operating data for a simple steam power plant are provided in figure. Kinetic and potential energy effects can be ignored. Determine the a) the mass flow rate of the steam, (10 pts.) b) Qin . (5 pts.) c) the mass flow rate of the cooling water, (5 pts.) d) thermal efficiency, (5 pts.) e) What happens to the thermal efficiency if we increase the turbine inlet pressure while keeping the inlet temperature (TI) constant? Explain it clearly. (10 pts.)...
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