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Selution Work done durit isothermal Process is gireny RT Ve WRTLN V Vo LuMe f Pressure diren Data R=0-287K 300K 400 kPa,-10oxa 100 400 NM0.287X300 Ln UI11336 K/K
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4 In an isothermal process in = 1 for air (Ideal Gas where R = 0.287...
A polytropic process for an ideal gas in one in which pressure and volume are related...
A polytropic process for an ideal gas in one in which pressure and volume are related by = const., where n is a constant. It is a generalization of the special processes considered earlier. Thus n = 0 defines an isobaric process, n = cp/cv an adiabatic process, n = 1 an isothermal process, and n = 8 an isochoric process. Suppose 1 kg of dry air at 280 K and 100 kPa undergoes a polytropic expansion in which the...
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A...
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A paddle wheel within the cylinder is rotated until 15 kJ of work is done on the air while the pressure is held constant. Assuming the kinetic and potential energies are negligible and the gas constant and specific heat of air are ? = 0.287 kJ kg∙K and ?? = 1.005 kJ kg∙K . Tasks: ( a ) Determine the mass of air inside the...
Problem 7: (15 pts) An ideal air-standard Brayton cycle operates steadily with pressure limits of the...
Problem 7: (15 pts) An ideal air-standard Brayton cycle operates steadily with pressure limits of the cycle are 100 kPa and 800 kPa. The temperature at the exit of turbine is 500 K. During the heat rejection process, heat is released from the cycle at a rate of 320 kW and the mass flow rate is 2 kg/s. The air is treated as an ideal gas with constant specific heats, i.e. k = 1.4 and R = 0.287 kJ/(kg ·...
kPa (20) 3. An ideal Stirling cycle uses air as the working fluid. The air is at 400 K and 200 kPa at the beginning...
kPa (20) 3. An ideal Stirling cycle uses air as the working fluid. The air is at 400 K and 200 kPa at the beginning of the isothermal compression process, and heat is supplied to the air from a source at 1800 K in the amount of 900 kJ/kg.Utilizing cold air-standard assumptions, determine the maximum pressure in the cycle. c,- 1.005 kJ/kg-K, k 1.4, R 0.287 kJ/kg-K tamet sam Proeess
kPa (20) 3. An ideal Stirling cycle uses air as...
Air goes through a polytropic process in a piston/cylinder setup. The polytropic index is n. The...
Air goes through a polytropic process in a piston/cylinder setup. The polytropic index is n. The process starts at P1 kPa, T1 oC, and ends with a pressure of P2 kPa. Answer Questions 6-8 about this process, considering the given information in Question 6. Assume air to be an ideal gas. Let, n=1.5 P1=2.3 MPa T1= 8.9 ×102 °C P2=2.1 ×102 kPa Cp = 1.004 kJ/kg-K, Cv = 0.717 kJ/kg-K, R = 0.287 kJ/kg-K Find the final temperature, in oC...
7. An ideal gas goes through a polytropic where n=1.4 with an initial pressure of 250...
7. An ideal gas goes through a polytropic where n=1.4 with an initial pressure of 250 kPa specific volume of 2 m®/kg to a final pressure of 75 kPa. Find the specific work of the process? (10 pts)
7. An industrial turbine process requires a steady 0.5 kg/s of air at 200 kPa. This air is to be the exhaust from a...
7. An industrial turbine process requires a steady 0.5 kg/s of air at 200 kPa. This air is to be the exhaust from a specially designed turbine with inlet state 400 kPa, 400 K. The heat transfer could be obtained from a source at 500 K if necessary. This process may be assumed to be reversible and the changes in kinetic and potential energy are negligible. Air is an ideal gas, with constant specific heats, using Table A.S (a) Which...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It is then compressed in a polytropic process PV3 = C to half the original volume. Assuming the ideal gas model for air and specific heat ratio is constant, k=1.4, determine (a) the final temperature, (b) work and heat transfer, each in kJ. R= 0.287 kJ/kg K. W, 82
Required information An ideal Otto cycle has a compression ratio of 8. At the beginning of...
Required information An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27 and 720 kJ/kg of heat is transferred to air during the constant volume heat addition process. Take into account the variation of specific heats with temperature. The gas constant of air is R=0.287 kJ/kg.K. Determine the network output (You must provide an answer before moving on to the next part.) The net work output...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
Problem 7: (15 pts) An ideal air-standard Brayton cycle operates steadily with pressure limits of the cycle are 100 kPa and 800 kPa. The temperature at the exit of turbine is 500 K. During the heat rejection process, heat is released from the cycle at a rate of 320 kW and the mass flow rate is 2 kg/s. The air is treated as an ideal gas with constant specific heats, i.e. k = 1.4 and R = 0.287 kJ/(kg ·...
kPa (20) 3. An ideal Stirling cycle uses air as the working fluid. The air is at 400 K and 200 kPa at the beginning of the isothermal compression process, and heat is supplied to the air from a source at 1800 K in the amount of 900 kJ/kg.Utilizing cold air-standard assumptions, determine the maximum pressure in the cycle. c,- 1.005 kJ/kg-K, k 1.4, R 0.287 kJ/kg-K tamet sam Proeess
kPa (20) 3. An ideal Stirling cycle uses air as...
7. An ideal gas goes through a polytropic where n=1.4 with an initial pressure of 250 kPa specific volume of 2 m®/kg to a final pressure of 75 kPa. Find the specific work of the process? (10 pts)
7. An industrial turbine process requires a steady 0.5 kg/s of air at 200 kPa. This air is to be the exhaust from a specially designed turbine with inlet state 400 kPa, 400 K. The heat transfer could be obtained from a source at 500 K if necessary. This process may be assumed to be reversible and the changes in kinetic and potential energy are negligible. Air is an ideal gas, with constant specific heats, using Table A.S (a) Which...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It is then compressed in a polytropic process PV3 = C to half the original volume. Assuming the ideal gas model for air and specific heat ratio is constant, k=1.4, determine (a) the final temperature, (b) work and heat transfer, each in kJ. R= 0.287 kJ/kg K. W, 82
Required information An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27 and 720 kJ/kg of heat is transferred to air during the constant volume heat addition process. Take into account the variation of specific heats with temperature. The gas constant of air is R=0.287 kJ/kg.K. Determine the network output (You must provide an answer before moving on to the next part.) The net work output...
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