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16 5 points Which of the following processes complete the Otto thermodynamic cycle used in vehicles...
A thermodynamic cycle consists of the following reversible processes: 1-2 isothermal expansion 2-3 isentropic compression 3-1 heat rejection at constant pressure The cycle works with 1.5 kg of water v...
A thermodynamic cycle consists of the following reversible processes: 1-2 isothermal expansion 2-3 isentropic compression 3-1 heat rejection at constant pressure The cycle works with 1.5 kg of water vapor. State 1 is dry saturated steam at 200 ° C; state 2 has a pressure of 100 kPa. Determine: a) The addition of heat, b) the net work, and c) the entropy change from 1 to 2.
During the expansion process of the ideal Otto cycle, the gas is a mixture whose volumetric...
During the expansion process of the ideal Otto cycle, the gas is a mixture whose volumetric composition is 28 percent nitrogen, 10 percent oxygen, 25 percent water, and 37 percent carbon dioxide. Calculate the thermal efficiency of this cycle when the air at the beginning of the compression is at 12 psia and 55°F, the compression ratio is 7, and the maximum cycle temperature is 1500°F. Model the heat-addition and heat-rejection processes using constant gas properties that are the average...
Consider a modification of the air-standard Otto cycle in which the isentropic compression and expansion processes...
Consider a modification of the air-standard Otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n = 1.35. The compression ratio is 10 for the modified cycle. At the beginning of compression, p1 = 1 bar and T1 = 310 K. The maximum temperature during the cycle is 2200 K. Determine: (a) the heat transfer and work in kJ per kg of air for each process in the modified cycle. (b) the...
Consider a modification of the air-standard Otto cycle in which the isentropic compression and expansion processes...
Consider a modification of the air-standard Otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n = 1.25. The compression ratio is 8 for the modified cycle. At the beginning of compression, p1 = 1 bar and T1 = 310 K. The maximum temperature during the cycle is 2200 K. Determine: (a) the heat transfer and work in kJ per kg of air for each process in the modified cycle. (b) the...
A gasoline engine operates on the air standard Otto cycle. The air intake to the engine...
A gasoline engine operates on the air standard Otto cycle. The air intake to the engine is at 300K and 95kPa (State 1). The air is compressed in the engine to an unknown pressure. Heat is then added during combustion at an amount of 1100 kJ/kg. At the end of the heat addition process, the temperature reaches 2200K. Compute the following: (a) the temperature at the end of the compression process, (b) the volumetric compression ratio of this engine, (c)...
Consider the following figure Otto cycle Heating at constant volume (fuel combustion) Он 3) Adiab...
Consider the following figure Otto cycle Heating at constant volume (fuel combustion) Он 3) Adiabatic expansion power stroke ed 0 rV Adiabatic compression (compression stroke) Cooling at constant volume (cooling of exhaust gases) (a) For the Otto cycle shown in the figure above, calculate the changes in entropy of the gas in each of the constant-volume processes b 无, and Td and the number of moles n and the heat capacity Cv of the gas. (Use any variable or symbol...
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...
Please explain which tables you used: The compression ratio of an air-standard Otto cycle is 9.5....
Please explain which tables you used: The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process, the air is at 100 kPa, 35°C, and 600 cm3. The temperature at the end of the isentropic expansion process is 800 K. Using specific heat values at room temperature, determine: (a) the highest temperature and pressure in the cycle; (b) the amount of heat transferred in, in kJ; (c) the thermal efficiency; and (d) the mean effective...
A shell-and-tube-type recuperator the feedwater temperature increases as the extracted steam condenses on the outside of...
A shell-and-tube-type recuperator the feedwater temperature increases as the extracted steam condenses on the outside of the tubes carrying the feedwater is an opened type feedwater heater 1. a. TRUE/FALSE 2. A vapor power plant that operates with a steam generator at a pressure of 19 MPa is a supercritical vapor power plant a. TRUE/FALSE Lowering the condenser pressures raises the maximum temperature of heat rejection from the Rankine cycle. 3. a. TRUE/FALSE For an ideal Rankine cycle the compression...
Q1 Otto Cycle Bookwork Question An air standard Otto cycle:- 1. Draws air from the environment...
Q1 Otto Cycle Bookwork Question An air standard Otto cycle:- 1. Draws air from the environment at 100 kPa and 5°C. 2. The cycle has a compression ratio of 9.2: 1. 3. Heat (880 kJ/kg) is added to the compressed gases at constant volume. 4. The working fluid is air, a perfect gas with ratio of specific heats y = 1.4 and gas constant R = 287 J/kgk. Follow the instructions below: a) Describe each of the four processes from...
A gasoline engine operates on the air standard Otto cycle. The air intake to the engine is at 300K and 95kPa (State 1). The air is compressed in the engine to an unknown pressure. Heat is then added during combustion at an amount of 1100 kJ/kg. At the end of the heat addition process, the temperature reaches 2200K. Compute the following: (a) the temperature at the end of the compression process, (b) the volumetric compression ratio of this engine, (c)...
Consider the following figure Otto cycle Heating at constant volume (fuel combustion) Он 3) Adiabatic expansion power stroke ed 0 rV Adiabatic compression (compression stroke) Cooling at constant volume (cooling of exhaust gases) (a) For the Otto cycle shown in the figure above, calculate the changes in entropy of the gas in each of the constant-volume processes b 无, and Td and the number of moles n and the heat capacity Cv of the gas. (Use any variable or symbol...
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...
A shell-and-tube-type recuperator the feedwater temperature increases as the extracted steam condenses on the outside of the tubes carrying the feedwater is an opened type feedwater heater 1. a. TRUE/FALSE 2. A vapor power plant that operates with a steam generator at a pressure of 19 MPa is a supercritical vapor power plant a. TRUE/FALSE Lowering the condenser pressures raises the maximum temperature of heat rejection from the Rankine cycle. 3. a. TRUE/FALSE For an ideal Rankine cycle the compression...
Q1 Otto Cycle Bookwork Question An air standard Otto cycle:- 1. Draws air from the environment at 100 kPa and 5°C. 2. The cycle has a compression ratio of 9.2: 1. 3. Heat (880 kJ/kg) is added to the compressed gases at constant volume. 4. The working fluid is air, a perfect gas with ratio of specific heats y = 1.4 and gas constant R = 287 J/kgk. Follow the instructions below: a) Describe each of the four processes from...
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