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3 2 T-A 1 1 2 3. The diagram above shows a plot of the temperature...
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...
0.25 moles ofa monatomic ideal gas starts from point a (400Pa and Im3) in the diagram as shown. It undergoes a constant...
0.25 moles ofa monatomic ideal gas starts from point a (400Pa and Im3) in the diagram as shown. It undergoes a constant pressure expansion from a to b (2m3); an isothermal process from b to c (3.2m3); a constant volume process c to d (125Pa); and an isothermal compression from d back to a. Problems 2-5 400 b a 300 2a. Find the temperature values Ta, Tb, Te and Td. 200 100 3 4 1 2 volume (m3) 2b. Find...
2. An ideal Diesel cycle has a compression ratio of 18 and a cut-off ratio of...
2. An ideal Diesel cycle has a compression ratio of 18 and a cut-off ratio of 2. At the beginning of the compression process P = 95 kPa and T = 20°C. (a) Find the temper- ature, pressure and specific volume at states 1, 2, 3, and 4. (b) Find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. (c) Calculate the thermal efficiency of a Carnot cycle...
9-2 An air-standard cycle is proposed which begins at an initial state of 47 C, 1.2...
9-2 An air-standard cycle is proposed which begins at an initial state of 47 C, 1.2 bars, and 0.765 m2/kg. Process 1-2 is constant-volume heating to 2.7 bars; process 2-3 is constant- pressure heating to 1.53 m3/kg; process 3-4 is isentropic expansion to 1.2 bars; process 4-1 is constant pressure cooling to the initial state. (a) Sketch pV and Ts diagrams for the cycle. (b) Determine the total amount of heat added, in ki/kg. (c) Find the net work output,...
An ideal Diesel cycle has a compression ratio of 17 and a cut-off ratio of 2....
An ideal Diesel cycle has a compression ratio of 17 and a cut-off ratio of 2. At the beginning of the compression process P = 100 kPa and T = 27◦C. Find the temperature, pressure and specific volume at states 1, 2, 3, and 4. Find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. Calculate the thermal efficiency of a Carnot cycle operating between the same temperature...
3. A newly built engine operates between the room temperature (21 oC) and the melting point...
3. A newly built engine operates between the room temperature (21 oC) and the melting point of silver (961 oC) and claims to have an actual efficiency of 75.0 %. a) How much mechanical energy per cycle does the engine deliver if it absorbs 3.50 x 106 J of heat everycycle (from the hot bath) assuming this claim is true? b) How much thermal energy does the engine reject per cycle to the colder reservoir at 21o C if the...
Example 7.17 Calculate the minimum work required to chill 2 kg of drinking water from a...
Example 7.17 Calculate the minimum work required to chill 2 kg of drinking water from a temperature of 25°C to 2°C. The Cp of water as 4.184 kJ/kg.K. Problem 2: ( 2 Points) Example 7.18 A novel reversible heat engine plot on a T-s diagram is as circle. The maximum and minimum temperatures are 1100 K and 200 K, respectively and the maximum entropy change in the cycle is 2 kJ/K. Calculate the heat added to the cycle, heat rejected,...
A heat engine takes 0.262 mol of a diatomic deal gas around the cycle shown in the pV-diagram bel...
A heat engine takes 0.262 mol of a diatomic deal gas around the cycle shown in the pV-diagram below. Process 1 → 2 is at constant volume, process 2-) 3 is adiabatic, and process 3-1 is at a constant pressure of P = 2.00 atm. The value of r for this gas is 1.4 2,7-600K T,-300 K T, 492 K 0 (a) Find the pressure and volume at points 1, 2, and 3. pressure (Pa) volume (m3) point 1 point...
for more information google it 1 Draw Ph diagram and Ts diagram ( general) with following...
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it
1 Draw Ph diagram and Ts diagram ( general) with following data Temperature should be at accurate position but entropy can vary) [18] Condensation Pc Expansion Compression P Evaporation T1=-30 Degree P1=0.08 MPa T2= 70 Degree P2=2 MPa 1. Find heat rejected at condenser 2. Find heat added at evaporator 3. Find heat difference at compressor 4. Find heat rejected/added at expansion valve 5. Find COP H(Heat pump) 6. Find COP R(Refrigrant) 7. Find enthalpy...
Question 3: In a gas turbine engine, the compressor takes in air at a temperature of...
Question 3: In a gas turbine engine, the compressor takes in air at a temperature of 15°C, pressure of 100 kPa, and a volumetric flow rate of 5 m3/s and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after...
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...
0.25 moles ofa monatomic ideal gas starts from point a (400Pa and Im3) in the diagram as shown. It undergoes a constant pressure expansion from a to b (2m3); an isothermal process from b to c (3.2m3); a constant volume process c to d (125Pa); and an isothermal compression from d back to a. Problems 2-5 400 b a 300 2a. Find the temperature values Ta, Tb, Te and Td. 200 100 3 4 1 2 volume (m3) 2b. Find...
2. An ideal Diesel cycle has a compression ratio of 18 and a cut-off ratio of 2. At the beginning of the compression process P = 95 kPa and T = 20°C. (a) Find the temper- ature, pressure and specific volume at states 1, 2, 3, and 4. (b) Find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. (c) Calculate the thermal efficiency of a Carnot cycle...
9-2 An air-standard cycle is proposed which begins at an initial state of 47 C, 1.2 bars, and 0.765 m2/kg. Process 1-2 is constant-volume heating to 2.7 bars; process 2-3 is constant- pressure heating to 1.53 m3/kg; process 3-4 is isentropic expansion to 1.2 bars; process 4-1 is constant pressure cooling to the initial state. (a) Sketch pV and Ts diagrams for the cycle. (b) Determine the total amount of heat added, in ki/kg. (c) Find the net work output,...
Example 7.17 Calculate the minimum work required to chill 2 kg of drinking water from a temperature of 25°C to 2°C. The Cp of water as 4.184 kJ/kg.K. Problem 2: ( 2 Points) Example 7.18 A novel reversible heat engine plot on a T-s diagram is as circle. The maximum and minimum temperatures are 1100 K and 200 K, respectively and the maximum entropy change in the cycle is 2 kJ/K. Calculate the heat added to the cycle, heat rejected,...
A heat engine takes 0.262 mol of a diatomic deal gas around the cycle shown in the pV-diagram below. Process 1 → 2 is at constant volume, process 2-) 3 is adiabatic, and process 3-1 is at a constant pressure of P = 2.00 atm. The value of r for this gas is 1.4 2,7-600K T,-300 K T, 492 K 0 (a) Find the pressure and volume at points 1, 2, and 3. pressure (Pa) volume (m3) point 1 point...
for more information google
it
1 Draw Ph diagram and Ts diagram ( general) with following data Temperature should be at accurate position but entropy can vary) [18] Condensation Pc Expansion Compression P Evaporation T1=-30 Degree P1=0.08 MPa T2= 70 Degree P2=2 MPa 1. Find heat rejected at condenser 2. Find heat added at evaporator 3. Find heat difference at compressor 4. Find heat rejected/added at expansion valve 5. Find COP H(Heat pump) 6. Find COP R(Refrigrant) 7. Find enthalpy...
Question 3: In a gas turbine engine, the compressor takes in air at a temperature of 15°C, pressure of 100 kPa, and a volumetric flow rate of 5 m3/s and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after...
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