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Need help with this thermodynamics problem
. You have an engine modeled after the Diesel cycle...
2. Analyze an Audi 3.0-liter TDI V6 Biturbo diesel engine using an air-standard Diesel cycle that...
2. Analyze an Audi 3.0-liter TDI V6 Biturbo diesel engine using an air-standard Diesel cycle that addresses the "real" effects of non-isentropic compression/expansion, air-fuel ratio, fuel heating value, incomplete combustion, exhaust residual, and heat loss. The engine is four-stroke, has six cylinders with a compression ratio of 16.0, and develops maximum power at 4250 rpm. Assume the following: the diesel fuel heating value is Quv 42,600 kJ/kg, the air-to-fuel ratio (AF) at maximum power is 25, and the combustion efficiency...
An idealized diesel engine operates in a cycle known as the air-standard diesel cycle shown in...
An idealized diesel engine operates in a cycle known as the air-standard diesel cycle shown in the figure below. Fuel is sprayed into the cylinder at the point of maximum compression, B. Combustion occurs during the expansion B-C, which is modeled as an isobaric process. Show that the efficiency of an engine operating in this idealized diesel cycle is given by the following expression. (Submit a file with a maximum size of 1 MB.) 1/10-TA VTC e-1- Adiabatic processes V...
A diesel engine with a compression ratio of 14.5 starts the compression stroke with air at...
A diesel engine with a compression ratio of 14.5 starts the compression stroke with air at 101 kPa and 42ºC. Fuel with a heating value of 43,260 kJ/kg is used with a fuel/air ratio of 0.03 kg fuel/kg air. At full throttle the airflow to engine is measured to be 0.1 m3/s and 5% of the fuel does not burn due to poor fuel-air mixing. Model the engine as airstandard with variable specific heats, draw the cycle on a P-V...
An automobile has a 3.2 liter, five cylinders, four stroke cycle diesel engine operating at 2400...
An automobile has a 3.2 liter, five cylinders, four stroke cycle diesel engine operating at 2400 rpm. Fuel injection occurs from 200 BTDC to 50 ATDC. The engine has a volumetric efficiency of 0.95 and operates with fuel equivalence ratio of 0.80. Light diesel fuel is used for the operation. The engine has a compression ratio of 18:1 and operates on an air-standard dual cycle. At the same speed, combustion starts at 7° BTDC and lasts for 42° of engine...
Consider the expansion stroke only of a typical air-standard Diesel cycle engine which has a comp...
Consider the expansion stroke only of a typical air-standard Diesel cycle engine which has a compression ratio of 20 and a cutoff ratio of 2. At the beginning of the process (fuel injection) the air temperature is 627°C, and the air expands at a constant pressure of 6.2 MPa until cutoff (volume ratio 2:1). Subsequently the air expands adiabatically until it reaches the maximum volume. Using ideal gas properties of air at 1000K, determine the: (a) temperatures reached at the...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of free air inducted per minute. The volumetric efficiency is 82 % at 3600 rpm referred to atmospheric condition of 1 bar and 27 oC. A rotary compressor which is mechanically coupled to the engine is used to supercharge the engine. The pressure ratio and the isentropic efficiency of the compressor are 1.6 and 75 % respectively. Calculate the percentage increase in brake power due...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
I'm so glad if you solve this problem. Thank you (1 a Brayton cycle with an...
I'm so glad if you solve this problem.
Thank you
(1 a Brayton cycle with an ideal regenerator has inlet (ompressor) at 2900K, 50 kPa with the highest PT as nato kla, 17000K. Find the specific heat transfer (au), and the cycle efficiency (using two approaches) using cold air properties. (50 points) (2) At the beginning of compression in a Diesel cycle T = 30ook, P=200kPa, and after combustion Cheat addition) is complete T=1500 K, and P=7.0 MPa. Find the...
please help thermodynamics a) Explain the methods that can be adopted to increase the thermal efficiency...
please help thermodynamics
a) Explain the methods that can be adopted to increase the thermal efficiency of a vapor power cycle. You may use a T-s diagram to explain your reasons. b) A steam regenerative cycle, shown below, is delivering 100 MW of power. Steam from the boller is supplied to the turbine at 8 MPa. 400°C. After expanding isentropically in the 1st stage turbine to a pressure of 1 MPa, steam is taken to the reheater where Its temperature...
Problem 3 In modern high-speed compression ignition engines, fuel is injected into the combustion chamber much...
Problem 3 In modern high-speed compression ignition engines, fuel is injected into the combustion chamber much sooner than in early diesel engines. That means, heat is added partly at constant volume and partly at constant pressure. The advantage of this modification is that more time is available for the fuel to completely combust. The ideal dual cycle consists of the following operations: • Process -: Isentropic compression • Process -3: Addition of heat at constant volume. • Process - Addition...
2. Analyze an Audi 3.0-liter TDI V6 Biturbo diesel engine using an air-standard Diesel cycle that addresses the "real" effects of non-isentropic compression/expansion, air-fuel ratio, fuel heating value, incomplete combustion, exhaust residual, and heat loss. The engine is four-stroke, has six cylinders with a compression ratio of 16.0, and develops maximum power at 4250 rpm. Assume the following: the diesel fuel heating value is Quv 42,600 kJ/kg, the air-to-fuel ratio (AF) at maximum power is 25, and the combustion efficiency...
An idealized diesel engine operates in a cycle known as the air-standard diesel cycle shown in the figure below. Fuel is sprayed into the cylinder at the point of maximum compression, B. Combustion occurs during the expansion B-C, which is modeled as an isobaric process. Show that the efficiency of an engine operating in this idealized diesel cycle is given by the following expression. (Submit a file with a maximum size of 1 MB.) 1/10-TA VTC e-1- Adiabatic processes V...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
I'm so glad if you solve this problem.
Thank you
(1 a Brayton cycle with an ideal regenerator has inlet (ompressor) at 2900K, 50 kPa with the highest PT as nato kla, 17000K. Find the specific heat transfer (au), and the cycle efficiency (using two approaches) using cold air properties. (50 points) (2) At the beginning of compression in a Diesel cycle T = 30ook, P=200kPa, and after combustion Cheat addition) is complete T=1500 K, and P=7.0 MPa. Find the...
please help thermodynamics
a) Explain the methods that can be adopted to increase the thermal efficiency of a vapor power cycle. You may use a T-s diagram to explain your reasons. b) A steam regenerative cycle, shown below, is delivering 100 MW of power. Steam from the boller is supplied to the turbine at 8 MPa. 400°C. After expanding isentropically in the 1st stage turbine to a pressure of 1 MPa, steam is taken to the reheater where Its temperature...
Problem 3 In modern high-speed compression ignition engines, fuel is injected into the combustion chamber much sooner than in early diesel engines. That means, heat is added partly at constant volume and partly at constant pressure. The advantage of this modification is that more time is available for the fuel to completely combust. The ideal dual cycle consists of the following operations: • Process -: Isentropic compression • Process -3: Addition of heat at constant volume. • Process - Addition...
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