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Show that for any given temperature ratio, t, the optimum pressure ratio, rp,op for which specific...
An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio rp of...
An aircraft engine operates on a simple ideal Brayton cycle with
a pressure ratio rp of 9. Heat is added to the cycle at a rate of
490 kW; air passes through the engine at a rate of 1.1 kg/s; and
the air at the beginning of the compression is at P1 = 71 kPa and
T1 = 0 oC. Use constant specific heats at room temperature. The
properties of air at room temperature are cp =1.005 kJ/kg.K and k...
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...
15. Which of the following molecules would have the highest vapor pressure at any given temperature?...
15. Which of the following molecules would have the highest vapor pressure at any given temperature? A. Ethylene diamine, NH2CH2CH2NH2 O B. Ethylene glycol, HOCH2CH2OH O C. Chlorine, Cl2 o D. 1-chloropropane, CH3CH2CH2CI
Problem 4 (hand-calculation): Consider the constant-pressure specific heat of air at high temperature presented in ta- ble 4, where T is the temperature and Cp is the specific heat. Determine a l...
Problem 4 (hand-calculation): Consider the constant-pressure specific heat of air at high temperature presented in ta- ble 4, where T is the temperature and Cp is the specific heat. Determine a least squares quadratic polynomial approximation for this set of data. The quadratic polynomial has the following form: Cp = a + bT+cT. where the coefficients a, b and c are to be determined using the least squares method. Hint Follow the derivation of linear regression discussed in class. You...
Fuel: 0.84C12H26+0.11C7H8+0.05C2H5OH Pressure ratio: rp = 16.7 Equivalence ratio: φ = 0.38 The fuel is a three-fuel blend of: Name Chemical Formula h¯◦f n-dodecane C12H26. −35...
Fuel: 0.84C12H26+0.11C7H8+0.05C2H5OH Pressure ratio: rp = 16.7 Equivalence ratio: φ = 0.38 The fuel is a three-fuel blend of: Name Chemical Formula h¯◦f n-dodecane C12H26. −352,100 kJ/kmol toluene C7H8 12,178 kJ/kmol ethanol C2H5OH −277,507 kJ/kmol For the inlet air conditions, use a temperature of 280 K and a pressure of 100 kPa. a) Calculate the net engine power for an air mass flow rate of 50 kg/s. • Except during combustion, assume that the working fluid is air, but account...
DATA Temperature (°C) Temperature (K) /T (K) Vapor Pressure (mm Hg) In (Vapor Pressure) 299.0K 302.2...
DATA Temperature (°C) Temperature (K) /T (K) Vapor Pressure (mm Hg) In (Vapor Pressure) 299.0K 302.2 K 30% 30q.2K 0.003344 D.003210 o -1 -l -I 149.U |い·3· 1912 0T.2 1. Plot In(Vapor Pressure) vs. 1/T using a spreadsheet program like Excel. Include the correlation coefficient and the lincar regression equation for the best-fit straight line through the points.dsa Attach the graph to this report. I Iniar regresstoneqvation035 Calculate the heat of vaporization for ethanol based on the slope obtained from...
thermodynamic question.please just solve 9-84 9-82 A simple Brayton cycle using air as the working fluid has a pressure ratio of 10. The minimum c and maximum temperatures in the cycle are 295 an...
thermodynamic question.please just solve 9-84
9-82 A simple Brayton cycle using air as the working fluid has a pressure ratio of 10. The minimum c and maximum temperatures in the cycle are 295 and 1240 K. Assuming an isentropic efficiency of 83 percent for the com pressor and 87 percent for the turbine, determine (a) the air temperature at the turbine exit, (b) the net work output, and (c) the thermal efficiency. 9-84 Repeat Prob. 9-82 using constant specific heats...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370 T (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency (d) the mean...
Pressure ratio of a Brayton cycle with air operated regenerator 8. The lowest and highest temperatures...
Pressure ratio of a Brayton cycle with air operated regenerator 8. The lowest and highest temperatures of the cycle are 310 K and 1150 K. Adiabatic efficiency of compressor and turbine 75% and 82%, respectively. the efficiency of the regenerator is 65%. The cycle in the T-s diagram Show. Consider the variation of specific temperatures with temperature. a) the temperature of the air at the turbine outlet, b) Net work of the cycle, c) Calculate the thermal efficiency of the...
Problem 1 A diesel engine has a compression ratio r = 20 and uses air as...
Problem 1 A diesel engine has a compression ratio r = 20 and uses air as the working fluid. The state of air at the beginning of the compression process is P1 = 95 kPa and T = 20°C. However, the isentropic expansion normally occuring between state 3 and state 4 is replaced by a polytropic process along which: Pul.35 = constant. The maximum temperature in the cycle is not to exceed 2200 K. In this analysis, the variation of...
An aircraft engine operates on a simple ideal Brayton cycle with
a pressure ratio rp of 9. Heat is added to the cycle at a rate of
490 kW; air passes through the engine at a rate of 1.1 kg/s; and
the air at the beginning of the compression is at P1 = 71 kPa and
T1 = 0 oC. Use constant specific heats at room temperature. The
properties of air at room temperature are cp =1.005 kJ/kg.K and k...
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...
15. Which of the following molecules would have the highest vapor pressure at any given temperature? A. Ethylene diamine, NH2CH2CH2NH2 O B. Ethylene glycol, HOCH2CH2OH O C. Chlorine, Cl2 o D. 1-chloropropane, CH3CH2CH2CI
Problem 4 (hand-calculation): Consider the constant-pressure specific heat of air at high temperature presented in ta- ble 4, where T is the temperature and Cp is the specific heat. Determine a least squares quadratic polynomial approximation for this set of data. The quadratic polynomial has the following form: Cp = a + bT+cT. where the coefficients a, b and c are to be determined using the least squares method. Hint Follow the derivation of linear regression discussed in class. You...
DATA Temperature (°C) Temperature (K) /T (K) Vapor Pressure (mm Hg) In (Vapor Pressure) 299.0K 302.2 K 30% 30q.2K 0.003344 D.003210 o -1 -l -I 149.U |い·3· 1912 0T.2 1. Plot In(Vapor Pressure) vs. 1/T using a spreadsheet program like Excel. Include the correlation coefficient and the lincar regression equation for the best-fit straight line through the points.dsa Attach the graph to this report. I Iniar regresstoneqvation035 Calculate the heat of vaporization for ethanol based on the slope obtained from...
thermodynamic question.please just solve 9-84
9-82 A simple Brayton cycle using air as the working fluid has a pressure ratio of 10. The minimum c and maximum temperatures in the cycle are 295 and 1240 K. Assuming an isentropic efficiency of 83 percent for the com pressor and 87 percent for the turbine, determine (a) the air temperature at the turbine exit, (b) the net work output, and (c) the thermal efficiency. 9-84 Repeat Prob. 9-82 using constant specific heats...
Problem 1 A diesel engine has a compression ratio r = 20 and uses air as the working fluid. The state of air at the beginning of the compression process is P1 = 95 kPa and T = 20°C. However, the isentropic expansion normally occuring between state 3 and state 4 is replaced by a polytropic process along which: Pul.35 = constant. The maximum temperature in the cycle is not to exceed 2200 K. In this analysis, the variation of...
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