Homework Answers
a. Q = CpdT
= 1.0 KJ/kgk * (25-5) K
= 20 KJ/Kg air
The heat transfer per Kg air is 20 KJ/kg.
Add Answer to:
4. Air enters the intake manifold at 25°C and 100 kPa on an SI engine utilizing...
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)...
Study smarter, not harder.
How does combustion tenper e te extent ol Teattiny Problem #2 A 4.0 Liter six-cylinder four-stroke SI square engine (bore and stroke 9.47 cm) with a direct injection system with one injector per cylinder is designed to have a maximum speed of 7000 RPM at wide open throttle with a stoichiometric air-fuel ratio of 14.6. The injector nozzle diameter is 0.2 mm. There is one intake valve per cylinder and the valve lift equals one fourth the valve diameter. The...
A mechanically coupled supercharger is run by a four-stroke four –cylinder square diesel engine with a...
A mechanically coupled supercharger is run by a four-stroke four –cylinder square diesel engine with a bore of 100 mm. Air enters the compressor at 27 °C and the compressor pressure ratio is 1.6. From the compressor the air is passed on to a cooler where 1200 kJ/min of heat is rejected. The air leaves the cooler at 67 oC. Some air from the compressor is bled after the cooler to supercharge the engine. The volumetric efficiency is 85 %...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a certain operating point onboard a vessel: (Geometric) compression ratio: Volumetric ratio: Combustion efficiency Heat input efficiency: Mechanical efficiency Entrapped air efficiency: Intake manifold pressure: Intake manifold temperature: v2 / v, = 20 comb = 98% = 75% m = 90% trap = 100% 3.5 bar (abs) 50°C In the above (see also the figure given at the bottom of the back page). VI: Volume...
An air-breathing gas-turbine jet engine operates at SSSF with complete combustion of 1 kmol / s of liquid ethanol fuel (C₂H₅OH)
An air-breathing gas-turbine jet engine operates at SSSF with complete combustion of 1 kmol / s of liquid ethanol fuel (C₂H₅OH). The given air-fuel ratio is 33 kg-air/kg-fuel. The constant pressure combustion process (2 → 3) results in a small amount of heat transfer out to the surroundings. Assume the inlet air is composed of 21 % O₂ and 79 % N₂(1 O₂+3.76 N₂)FIND the theoretical air-fuel ratio, AFTHEORETICAL= _______ kg-air/kg-fuelFIND the concentration of CO₂ in the exhaust gas on...
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...
Problem #4: Air is compressed in a piston cylinder from 1 bar, 17 °C such that...
Problem #4: Air is compressed in a piston cylinder from 1 bar, 17 °C such that the "2-30% v1 Assume polytropic compression with n - 1.3, negligible kinetic and potential energy changes, and ideal gas behavior. Determine the following. (a) the temperature of the exiting air, in °C; (b) the work and heat transfer, in kJ/kg (c) the entropy generated, in kJ/kgK, if heat transfer takes place at 520 K; (d) Also sketch the process on p-v and T-s diagrams...
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)...
Problem 4.040 SI Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is...
Problem 4.040 SI Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady state to 12 bar, 80°C. The volumetric flow rate of the refrigerant entering is 8.5 m3/min. The work input to the compressor is 127.5 kJ per kg of refrigerant flowing Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in kw kW the tolerance is +/-596 Click if you would like to Show...
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...
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)...
How does combustion tenper e te extent ol Teattiny Problem #2 A 4.0 Liter six-cylinder four-stroke SI square engine (bore and stroke 9.47 cm) with a direct injection system with one injector per cylinder is designed to have a maximum speed of 7000 RPM at wide open throttle with a stoichiometric air-fuel ratio of 14.6. The injector nozzle diameter is 0.2 mm. There is one intake valve per cylinder and the valve lift equals one fourth the valve diameter. The...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a certain operating point onboard a vessel: (Geometric) compression ratio: Volumetric ratio: Combustion efficiency Heat input efficiency: Mechanical efficiency Entrapped air efficiency: Intake manifold pressure: Intake manifold temperature: v2 / v, = 20 comb = 98% = 75% m = 90% trap = 100% 3.5 bar (abs) 50°C In the above (see also the figure given at the bottom of the back page). VI: Volume...
Problem #4: Air is compressed in a piston cylinder from 1 bar, 17 °C such that the "2-30% v1 Assume polytropic compression with n - 1.3, negligible kinetic and potential energy changes, and ideal gas behavior. Determine the following. (a) the temperature of the exiting air, in °C; (b) the work and heat transfer, in kJ/kg (c) the entropy generated, in kJ/kgK, if heat transfer takes place at 520 K; (d) Also sketch the process on p-v and T-s diagrams...
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)...
Problem 4.040 SI Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady state to 12 bar, 80°C. The volumetric flow rate of the refrigerant entering is 8.5 m3/min. The work input to the compressor is 127.5 kJ per kg of refrigerant flowing Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in kw kW the tolerance is +/-596 Click if you would like to Show...
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...
Most questions answered within 3 hours.
-
Ang Electronics, Inc., has developed a new HD DVD. If the HD DVD
is successful, the...
asked 16 minutes ago -
which of these substances cannot behave as a lewis base in an aq
solution
a- Co...
asked 22 minutes ago -
Below are some of Toyota’s (an automotive manufacturer) costs to
manufacture a car: I. Depreciation of...
asked 22 minutes ago -
A random sample of 40 cups of coffee from a vending machine had
a sample mean...
asked 42 minutes ago -
The mercury in a fish sample is determined to be 1.80, 1.58 and
1.64 ppm. Calculate...
asked 34 minutes ago -
Suppose a photon is equally likely to be found anywhere in an
interval of 28.5 cm...
asked 44 minutes ago -
Suppose the following is a divide-and-conquer algorithm for some
problem.
"Make the input of size n...
asked 1 hour ago -
Calculate the pH of the resulting solution if 15.0 mL of 0.150 M
HCl(aq) is added...
asked 1 hour ago -
How many moles of sulphur hexaflouride are present in 3.64 x 10^21
molecules of this compound?
asked 1 hour ago -
155 grams of ice at -10.0 degrees celsius is added to 1.17 kg of
water at...
asked 1 hour ago -
How did the Fed encourage business confidence after the
September 11 terrorist attacks? by lowering corporate...
asked 1 hour ago -
Question 201 pts
Which of the following best describes the consumption of a
non-rival good?
Group...
asked 1 hour ago