Question
In: Mechanical Engineering
A diesel engine has an inlet at 100 kPa, 310 K and a compression ratio of...
A diesel engine has an inlet at 100 kPa, 310 K and a compression ratio of 21:1. The combustion releases 1400 kJ/kg. Find the cycle efficiency and mean effective pressure.
Solutions
samet mamat answered 1 year agoRelated Solutions
A Diesel engine with a compression ratio of 16 has a cutoff ratio of 1.5. The...
A Diesel engine with a compression ratio of 16 has a cutoff
ratio of 1.5. The state before polytropic compression (exponent
1.3) is 1700 cm3 , 96 kPa and 22°C and there is isentropic
expansion.
(a) Sketch the P-v diagram for this cycle.
(b) Calculate the heat transfer in and heat transfer out.
answer must be Qin = 657 J or 724 J or 866 J, Qout = 291 J or
296 J or
(c) Determine the thermal efficiency.
answer...
A Diesel engine with a compression ratio of 16 has a cutoff ratio of 1.5. The...
A Diesel engine with a compression ratio of 16 has a cutoff
ratio of 1.5. The state before polytropic compression (exponent
1.3) is 1700 cm3, 96 kPa and 22°C and there is isentropic
expansion.
(a) Sketch the P-v diagram for this cycle.
(b) Calculate the heat transfer in and heat transfer out.
(c) Determine the thermal efficiency.
(d) Calculate the mean effective pressure.
A diesel engine has a compression ratio of 19. The lowest pressure of the bike is...
A diesel engine has a compression ratio of 19. The lowest pressure of the bike is 250 kPa, the lowest
the temperature is 180 ºC and the heat supply is 1200 kJ / kg.
(a) Draw a principle image of the engine. (1p)
(b) Draw a T-s and a P-v diagram with numbered points for the cycle (1p)
(c) Set up at least one table of given input for relevant points (1p)
The table can also be filled in with...
An ideal diesel engine has a compression ratio of 20 and uses air as the working...
An ideal diesel engine has a compression ratio of 20
and uses air as the working fluid. The state of air at
the beginning of the compression process is 95 kPa and 200C. If the
maximum temperature in the cycle
is not to exceed 2200 K,
Determine:
a) The thermal efficiency, and
b) The mean effective pressure, and
Assume constant specific heats for air at room temperature.
An ideal diesel engine has a compression ratio of 20 and uses air as the working...
An ideal diesel engine has a compression ratio of 20 and uses
air as the working fluid. The state of air at the beginning of the
compressor process is 100 kpa and 27 C. The maximum temperature in
the cycle is 2200 K and the cutoff ratio is 1.2
Determine the following:
The internal energies at the beginning and the end of the
compression
The enthalpy before and end of the combustion
The internal energy before and end of the...
Air is compressed from an inlet condition of 100 kPa, 300 K to an exit pressure...
Air is compressed from an inlet condition of 100 kPa, 300 K to
an exit pressure of 1000 kPa by an internally reversible
compressor. Determine the compressor power per unit mass flow rate
if the device is
(a) isentropic,
(b) polytropic with n =1.3,
(c) isothermal.
Air is compressed from an inlet condition of 100 kPa, 300 K to an exit pressure...
Air is compressed from an inlet condition of 100 kPa, 300 K to
an exit pressure of 1000 kPa by an internally reversible
compressor. Determine the compressor power per unit mass flow rate
if the device is
(a) isentropic,
(b) polytropic with n =1.3,
(c) isothermal.
9.43 An ideal air-standard state with compressor inlet conditions of 300 K and 100 kPa and...
9.43 An ideal air-standard
state with compressor inlet conditions of 300 K and 100 kPa and a
fixed turbine inlet temperature of 1700 K. For the cycle,
Plot the net work developed per unit mass flowing, in kJ/kg, and
the thermal efficiency, each versus compressor pressure ratio
ranging from 2 to 50.
I need the IT Thermodynamics software code, or at least
I need to know how to set the code up. Also, please note that this
is an air-standard...
An ideal Otto engine has a compression ratio of 10 and uses air as the working...
An ideal Otto engine has a compression ratio of 10 and uses air
as the working fluid. The state of air at the beginning of the
compression process is 100 kPa and 27 0C. The maximum
temperature in the cycle is 2100K. (R=0.287 for air) (using
variable specific heat)
Draw the P-v diagram of the Otto cycle
Determine the specific internal energies at the beginning and
the end of the compression,
Determine the specific internal energies before and after the...
The compression ratio of an ideal air-powered Diesel cycle is 20. At the beginning of the...
The compression ratio of an ideal air-powered Diesel cycle is
20. At the beginning of the compression process, the pressure of
the air is 100 kPa, the temperature is 20 ° C, and the highest
temperature of the cycle is required not to exceed 2250 K. Show the
cycle in the P-v diagram. Accept specific temperatures constant at
room temperature.
k=1.4 CP=1.005 kJ/kgK CV=0.718 kJ/kgK R=0.287 kJ/kgK
a) Calculate the temperatures entering and leaving the cycle,
the thermal efficiency of...
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