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![maaarg. 08 1575 he osbe negligible mon dalie &- W = [(h2h) be-wam [9 (53410] W = (2-7) 14-37(215) Cp = for hydrogen Gp = 14.3](http://img.homeworklib.com/questions/10397500-5c13-11eb-ac69-15738d2faab0.png?x-oss-process=image/resize,w_560)
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3. Hydrogen is to be compressed from 100kPa and 300K to 500kPa and 515K at a...
Air is compressed from 100kPa and 40°C to 1500 kPa and 130°C. During the compression process, each kilogram of air loses 90kJ as heat to the environment. Air is discharged at a rate of 10m^3/min. What is the power needed to drive the compressor?
Air is compressed from 100kPa and 40°C to 1500kPa and 130°C. During the compression process, each kilogram of air loses 90kJ as heat to the environment. Air is discharged at rate of 10m^3/min. What is the power needed to drive the compressor?
Consider a closed Brayton cycle heat-engine. Air is compressed from 300K, 100 kPa to 580K, 700...
Consider a closed Brayton cycle heat-engine. Air is compressed from 300K, 100 kPa to 580K, 700 kPa. The air is heated at the rate of 950 kJ/kg before it enters the turbine. The isentropic efficiency of the turbine is 86%. Determine: a) the fraction of the turbine shaft power used to drive the compressor, and b) the thermal efficiency of the engine. Sketch the prooess on a T-s diagram. Do the calculation first with variable specific heats and then repeat...
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an...
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100 kPa and 300K to a final state of at 200 kPa and 600K. Determine the change in specific entropy of air during this compression process. 2. (3 Points) A heat engine operates between two temperature limits of 1300 K and 400 K. It receives 1.2 MJ of heat while producing 500 kJ of useful work. Determine: a. The exergy of...
4.50 Air is compressed at steady state from 1 bara, 300 K, to 6 bara with...
4.50 Air is compressed at steady state from 1 bara, 300 K, to 6 bara with a mass flow rate of 4 kg/s. Each unit of mass passing from inlet to exit undergoes a process described by pvⁿ = constant, where n = 1.2677. Heat transfer occurs at a rate of 47.009 kJ per kg of air flowing to cooling water circulating in a water jacket enclosing the compressor. Kinetic and potential energy changes of the air from inlet to...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. if the volume flow rate = 1 m/sec Determine: the compressor power (kW) for isentropic compression with k = 1.4 Choose... the compressor power (kW) for polytropic compression with n = 1.3 Choose.. the compressor power (kW) for ideal two stage compression with intercooling with a polytropic exponent of 1.3 Choose... the compressor power (kW)...
Air, modeled as an ideal gas, is compressed at steady state from 1 bar, 300 K,...
Air, modeled as an ideal gas, is compressed at steady state from 1 bar, 300 K, to 5 bar, 500 K, with 190 kW of power input. Heat transfer occurs at a rate of 25.33 kW from the air to cooling water circulating in a water jacket enclosing the compressor. Neglecting kinetic and potential energy effects, determine the mass flow rate of the air, in kg/s.
Question 4 (16 Marks) A frictionless, adiabatic compressor compresses hydrogen at a pressure of 3 bar and a temperat...
Question 4 (16 Marks) A frictionless, adiabatic compressor compresses hydrogen at a pressure of 3 bar and a temperature of 10 °C, to a pressure of 16 bar. The hydrogen enters the compressor at a velocity of 80 m/s and exits at negligible velocity. From the compressor, the hydrogen is passed at constant pressure through a duct and cooled to a temperature of 55 °C, in the process. The hydrogen mass flow rate is 0.5 kg/s, and all changes in...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid....
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
35% Air (udara) is compressed in an axial flow compressor operating at steady state from 27°C,...
35% Air (udara) is compressed in an axial flow compressor operating at steady state from 27°C, 1 bar to a pressure of 4,41 bar. The work input required is 96,23 kJ/kg of air flowing through the compressor. Heat transfer from the compressor occurs at the rate of 15,65 kJ/kg at the surface of the compressor where the temperature is 40'C. Kinetic and potential energy changes can be ignored. Assuming air as an ideal gas with constant specific heat, cp =...
A combined gas turbine-vapor power plant has a net power output of 100 MW. Air enters...
A combined gas turbine-vapor power plant has a net power output of 100 MW. Air enters the compressor of the gas turbine at 100kPa, 300K, and is compressed to 1200kPa. The isentropic efficiency of the compressor is 84%. The conditions at the inlet to the turbine are 1200kPa and 1400 K. Air expands through the turbine, which has an isentropic efficiency of 88%, to a pressure of 100kPa. The air then passes through the interconnecting heat exchanger, and is finally...
Consider a closed Brayton cycle heat-engine. Air is compressed from 300K, 100 kPa to 580K, 700 kPa. The air is heated at the rate of 950 kJ/kg before it enters the turbine. The isentropic efficiency of the turbine is 86%. Determine: a) the fraction of the turbine shaft power used to drive the compressor, and b) the thermal efficiency of the engine. Sketch the prooess on a T-s diagram. Do the calculation first with variable specific heats and then repeat...
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100 kPa and 300K to a final state of at 200 kPa and 600K. Determine the change in specific entropy of air during this compression process. 2. (3 Points) A heat engine operates between two temperature limits of 1300 K and 400 K. It receives 1.2 MJ of heat while producing 500 kJ of useful work. Determine: a. The exergy of...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. if the volume flow rate = 1 m/sec Determine: the compressor power (kW) for isentropic compression with k = 1.4 Choose... the compressor power (kW) for polytropic compression with n = 1.3 Choose.. the compressor power (kW) for ideal two stage compression with intercooling with a polytropic exponent of 1.3 Choose... the compressor power (kW)...
Question 4 (16 Marks) A frictionless, adiabatic compressor compresses hydrogen at a pressure of 3 bar and a temperature of 10 °C, to a pressure of 16 bar. The hydrogen enters the compressor at a velocity of 80 m/s and exits at negligible velocity. From the compressor, the hydrogen is passed at constant pressure through a duct and cooled to a temperature of 55 °C, in the process. The hydrogen mass flow rate is 0.5 kg/s, and all changes in...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
35% Air (udara) is compressed in an axial flow compressor operating at steady state from 27°C, 1 bar to a pressure of 4,41 bar. The work input required is 96,23 kJ/kg of air flowing through the compressor. Heat transfer from the compressor occurs at the rate of 15,65 kJ/kg at the surface of the compressor where the temperature is 40'C. Kinetic and potential energy changes can be ignored. Assuming air as an ideal gas with constant specific heat, cp =...
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