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Determine if any ideal gas or vapour power cycle can have a thermal efficiency higher than...
in Problem II: The Brayton cycle is an idealized gas turbine power cycle that can be...
in Problem II: The Brayton cycle is an idealized gas turbine power cycle that can be modeled through the four reversible steady flow devices shown in the diagram. Use air as the working fluid with variable specific heats. Heat If the thermal source is at 700°C, and the thermal sink is at 35℃ what is the maximum thermal efficiency for a cycle operating between these two thermal reservoirs? (5 pts) A. CompressorTurbine B. In the real cycle, air enters the...
Assuming ideal gas behavior for the air, evaluate the thermal efficiency of the cycle.
Assuming ideal gas behavior for the air, evaluate the thermal
efficiency of the cycle.
Problem 3.094 SI Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. 4.5 Isothermal process (bar) 1.4 0 1.0 3.214285714286 v (m3/kg)
Problem 3.094 SI Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. 4.5 Isothermal process (bar) 1.4 0 1.0 3.214285714286 v (m3/kg)
We have seen that the Carnot cycle can be used to determine the maximum efficiency of...
We have seen that the Carnot cycle can be used to determine the maximum efficiency of a heat engine. The efficiency is defined as the sum of all of the work during the cycle divided by the amount of heat exchanged during the expansion process: efficiency=?1 +?2 +?3 +?3 /?1 Theoretically, the efficiency of the engine can be determined with the hot and cold temperature of the cycle. efficiency = ?h − ?c/ ?h In this problem, we will calculate...
2. For the gas turbine cycle with one reheat, prove that the thermal efficiency can be expressed ...
2. For the gas turbine cycle with one reheat, prove that the thermal efficiency can be expressed as follows when the power output is maximum T. 2 4 max k-1 k-1 min k-1 T. 2 max -r min k-1 where Tmax and Tmin are the maximum and minimum temperatures of the cycle, respectively; rp is the pressure ratio of the compressor and k is the ratio of specific heats. Assume specific heat capacity and ratio of heat capacities to be...
Find the thermal efficiency of the cycle and fill in the table for the values of...
Find the thermal efficiency of the cycle and fill in the table for the values of the properties and the phase of the state. 1. Consider a steam power plant operating on the ideal Rankine cycle. Determine the thermal efficiency of this cycle. Boiler 13 4 MPa 450 °C Pump Turbine 7.5 kPa 04 Condenser Condenser State Phase Known Properties Unknown Properties
Thermodynamics 1 A thermal power plant based on an ideal reheat cycle uses steam as the...
Thermodynamics
1 A thermal power plant based on an ideal reheat cycle uses steam as the operating fluid and is operated between 800 psi and 2 psi. The pressure and temperature at the turbine inlet are 800 psi and 750° F. The steam is expanded in the turbine to 80 psi and then reheated to 700° F. The steam is then expanded to 2 psi. (a) Show the schematic identifying the major components in the power plant, i.e. boiler, turbine,...
Consider the combined gas-steam power cycle,The topping cycle is a gas-turbine cycle that has a pressure ratio of 8.Air enters the compressor at 300K and the turbine at 1300K.The isentropic efficiency...
Consider the combined gas-steam power cycle,The topping cycle is a gas-turbine cycle that has a pressure ratio of 8.Air enters the compressor at 300K and the turbine at 1300K.The isentropic efficiency of the compressor is 80 percent, and that of the gas is 85 percent.The bottoming cycle is a simple ideal Rankine cycle operating between the pressures limits of 7 MPa and 5 KPa.Steam is heated in a heat exchanger by the exahust gases to a temperature of 5000C.The exhaust...
A steam power plant operates on an ideal reheat Rankine cycle between the pressure limits of...
A steam power plant operates on an ideal reheat Rankine cycle between the pressure limits of 5 MPa and 100 kPa. The temperature of the steam att the turbine is 500 C degree and the mass flow rate of steam through the cycle is 35 kg/s. a) Determine the thermal efficiency of the cycle. b) determine the net power output of the power plant ( Assume both the turbine and the pump have isentropic efficiency of 100%). c) Draw the...
2. Show that the thermal efficiency for the gas power plant shown below can be expressed as follo...
2. Show that the thermal efficiency for the gas power plant shown below can be expressed as follows k-1 +1 where nc and nt are the isentropic efficiencies of the compressor and turbine, respectively. Ts and Tı are the maximum and minimum temperatures of the cycle, respectively; rp is the pressure ratio of the cycle and k is the ratio of specific heats. Assume specific heat capacity to be constant for this derivation. (6 Points) Heater 3 Work 2 Heat...
Question 2 A vapour compression cycle acts as both a heat source (radiators and a hot...
Question 2 A vapour compression cycle acts as both a heat source (radiators and a hot water load) and a cooling load (food preservation). The system requires an operating temperature of 50°C to support the bulk of the heating load and -10°C for the cooling load. a) Determine the operating pressures of the cycle in bar. Also, assuming we require a maximum temperature of 90°C to operate certain higher temperature heat processes (for hygiene related reasons), determine the enthalpy at...
in Problem II: The Brayton cycle is an idealized gas turbine power cycle that can be modeled through the four reversible steady flow devices shown in the diagram. Use air as the working fluid with variable specific heats. Heat If the thermal source is at 700°C, and the thermal sink is at 35℃ what is the maximum thermal efficiency for a cycle operating between these two thermal reservoirs? (5 pts) A. CompressorTurbine B. In the real cycle, air enters the...
Assuming ideal gas behavior for the air, evaluate the thermal
efficiency of the cycle.
Problem 3.094 SI Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. 4.5 Isothermal process (bar) 1.4 0 1.0 3.214285714286 v (m3/kg)
Problem 3.094 SI Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. 4.5 Isothermal process (bar) 1.4 0 1.0 3.214285714286 v (m3/kg)
2. For the gas turbine cycle with one reheat, prove that the thermal efficiency can be expressed as follows when the power output is maximum T. 2 4 max k-1 k-1 min k-1 T. 2 max -r min k-1 where Tmax and Tmin are the maximum and minimum temperatures of the cycle, respectively; rp is the pressure ratio of the compressor and k is the ratio of specific heats. Assume specific heat capacity and ratio of heat capacities to be...
Find the thermal efficiency of the cycle and fill in the table for the values of the properties and the phase of the state. 1. Consider a steam power plant operating on the ideal Rankine cycle. Determine the thermal efficiency of this cycle. Boiler 13 4 MPa 450 °C Pump Turbine 7.5 kPa 04 Condenser Condenser State Phase Known Properties Unknown Properties
Thermodynamics
1 A thermal power plant based on an ideal reheat cycle uses steam as the operating fluid and is operated between 800 psi and 2 psi. The pressure and temperature at the turbine inlet are 800 psi and 750° F. The steam is expanded in the turbine to 80 psi and then reheated to 700° F. The steam is then expanded to 2 psi. (a) Show the schematic identifying the major components in the power plant, i.e. boiler, turbine,...
2. Show that the thermal efficiency for the gas power plant shown below can be expressed as follows k-1 +1 where nc and nt are the isentropic efficiencies of the compressor and turbine, respectively. Ts and Tı are the maximum and minimum temperatures of the cycle, respectively; rp is the pressure ratio of the cycle and k is the ratio of specific heats. Assume specific heat capacity to be constant for this derivation. (6 Points) Heater 3 Work 2 Heat...
Question 2 A vapour compression cycle acts as both a heat source (radiators and a hot water load) and a cooling load (food preservation). The system requires an operating temperature of 50°C to support the bulk of the heating load and -10°C for the cooling load. a) Determine the operating pressures of the cycle in bar. Also, assuming we require a maximum temperature of 90°C to operate certain higher temperature heat processes (for hygiene related reasons), determine the enthalpy at...
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