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output of the cycle is 300 kJ/kg. What is the mean effective pressue (MEPS a) 227...
The mass flow rate of R-134a in a vapor-compression refrigeration cycle is 6 kg/min
The mass flow rate of R-134a in a vapor-compression refrigeration cycle is 6 kg/min. At the inlet of the compressor, R-134a is at -10°C, 150 kPa. The pressure at the compressor exit is 600 kPa. The compressor has an isentropic efficiency of 67%. The refrigerant leaves the condenser at 20°C. Neglect any pressure drops in the condenser, the evaporator, and pipes. Assume an adiabatic compressor. (a)draw the cycle and the T-s diagram of the cycle. Also find: (b)the coefficient of the performance...
Consider a 300 kJ/min refrigeration system that operates on an ideal vapor-compression refrigerat...
Consider a 300 kJ/min refrigeration system that operates on an ideal vapor-compression refrigeration cycle with R-134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 140 kPa and is compressed to 800 kPa. Show the cycle on a T-s diagram with respect to saturation lines and determine (a) the quality of the refrigerant at the end of the throttling process, (b) coefficient of performance, (c) the power input to the compressor , (d) Generation of entropy...
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 100 kPa, 300...
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 100 kPa, 300 K, with a volume flow rate of 5 m3/s. The compressor pressure ratio is 8, and the turbine inlet temperature is 1400 K. The turbine and compressor each have isentropic efficiencies of 80% and the regenerator effectiveness is 80%. For the air, k = 1.4 and the ambient temperature is T0 = 300 K. -Determine the thermal efficiency of the cycle. -determine the back...
1. (10 points) A combined gas turbine-vapor power plant has a net power output of 45...
1. (10 points) A combined gas turbine-vapor power plant has a net power output of 45 MW. Air enters the compressor of the gas turbine at 100 kPa, 300 K, and is compressed to 1200 kPa. The isentropic efficiency of the compressor is 84%. The condition at the inlet to the turbine is 1200 kPa, 1400 K. Air expands through the turbine, which has an isentropic efficiency of 88%, to a pressure of 100 kPa. The air then passes through...
WGTC η.cn = 95% Gas turbine cycle (GTc) e,I = 100 kW Compressor Turbine Generator 께,- Combustor ...
wGTC η.cn = 95% Gas turbine cycle (GTc) e,I = 100 kW Compressor Turbine Generator 께,- Combustor Pi 100 kPa Regenerator Evaporator Turbine Generator Vapor turbine cycde (VTC) T, = T, + 20 K Condenser 10 Pump Saturated liquid A combined cycle plant operates with a topping gas turbine and a bottoming vapor turbine cycle. The working fluid in the vapor turbine cycle is water. The gas turbine cycle (GTC) electric generator produces 100kW of electric power For air use...
The refrigerant gas which is air, enters the compressor of a Brayton refrigeration cycle at 101...
The refrigerant gas which is air, enters the compressor of a Brayton refrigeration cycle at 101 kPa, 280 K. If the compressor pressure ratio is 5 and the turbine inlet temperature is 330 K. The compressor has an isentropic efficiency of 70% and the turbine has an isentropic efficiency of 80%. Using air table rather than constant-specific-heat theory, determine (a) the net work input per unit mass of air flow, (b) the refrigeration capacity, in kJ/kg, (c) the coefficient 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...
Please help with HW 37 Qoutl condenser Condenser A standard 4-component vapor-compression cycle using R-134a is...
Please help with HW 37
Qoutl condenser Condenser A standard 4-component vapor-compression cycle using R-134a is shown in the figure to the right. The cycle is used as a refrigeration cycle to cool a refrigerator at 5 °C with a cooling capacity of 200 W, with a heat transfer to a kitchen at 20 °C. Assume that the pressure drops in the evaporator and condenser are negligible, and that the compressor and expansion valve are adiabatic. Take the boundary temperature...
2. Consider a combined gas steam power cycle. The gas cycle is a simple Brayton cycle...
2. Consider a combined gas steam power cycle. The gas cycle is a
simple Brayton cycle that has a pressure ratio of 7. Air enters at
9.8 kg / s at the compressor at 15 ° C and 100 kPa, and at the gas
turbine at 950 ° C. The steam cycle is a Rankine cycle with
overheating between the pressure limits of 6 MPa and 10 kPa. The
water vapor is heated in the heat exchanger at a rate...
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...
Consider a 300 kJ/min refrigeration system that operates on an ideal vapor-compression refrigeration cycle with R-134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 140 kPa and is compressed to 800 kPa. Show the cycle on a T-s diagram with respect to saturation lines and determine (a) the quality of the refrigerant at the end of the throttling process, (b) coefficient of performance, (c) the power input to the compressor , (d) Generation of entropy...
1. (10 points) A combined gas turbine-vapor power plant has a net power output of 45 MW. Air enters the compressor of the gas turbine at 100 kPa, 300 K, and is compressed to 1200 kPa. The isentropic efficiency of the compressor is 84%. The condition at the inlet to the turbine is 1200 kPa, 1400 K. Air expands through the turbine, which has an isentropic efficiency of 88%, to a pressure of 100 kPa. The air then passes through...
wGTC η.cn = 95% Gas turbine cycle (GTc) e,I = 100 kW Compressor Turbine Generator 께,- Combustor Pi 100 kPa Regenerator Evaporator Turbine Generator Vapor turbine cycde (VTC) T, = T, + 20 K Condenser 10 Pump Saturated liquid A combined cycle plant operates with a topping gas turbine and a bottoming vapor turbine cycle. The working fluid in the vapor turbine cycle is water. The gas turbine cycle (GTC) electric generator produces 100kW of electric power For air use...
Please help with HW 37
Qoutl condenser Condenser A standard 4-component vapor-compression cycle using R-134a is shown in the figure to the right. The cycle is used as a refrigeration cycle to cool a refrigerator at 5 °C with a cooling capacity of 200 W, with a heat transfer to a kitchen at 20 °C. Assume that the pressure drops in the evaporator and condenser are negligible, and that the compressor and expansion valve are adiabatic. Take the boundary temperature...
2. Consider a combined gas steam power cycle. The gas cycle is a
simple Brayton cycle that has a pressure ratio of 7. Air enters at
9.8 kg / s at the compressor at 15 ° C and 100 kPa, and at the gas
turbine at 950 ° C. The steam cycle is a Rankine cycle with
overheating between the pressure limits of 6 MPa and 10 kPa. The
water vapor is heated in the heat exchanger at a rate...
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...
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