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In: Mechanical Engineering
3 Question 3: In an air standard Diesel cycle with compression ratio 14, the conditions of...
3 Question 3: In an air standard Diesel cycle with compression ratio 14, the conditions of the air at the start of compression stroke are 1 bar and 300 K. After addition of heat at constant pressure, the temperature rises to 2774 K. Determine: a) the thermal efficiency of the cycle b) the net work done per kg of air and the c) mean effective pressure
Solutions
samet mamat answered 3 years agoRelated Solutions
3. The compression ratio of the ideal air-powered diesel cycle is 14, while the cutting rate...
3. The compression ratio of the ideal air-powered diesel cycle
is 14, while the cutting rate is 1.8.Since the air was initially at
100 kPa and 25 ° C;
a. Pressure and temperature at the end of the heat transfer
process
b. Thermal efficiency
c. Find the mean effective pressure (M.E.P).
Question 1) In an air standard diesel cycle, the conditions of the air at the start...
Question 1) In an air standard diesel cycle,
the conditions of the air at the start of the compression stroke
are 2 bar and 30℃. The pressure rises to 30bar after compression,
and through combustion, 1200 kJ of energy is added per kg air.
Calculate
Compression ratio
Cutoff ratio
Mean effective pressure
Temperature and pressure at the end of each process
work done per kg air
Thermal efficiency of the cycle
An air-standard dual cycle has a compression ratio of 14. At the beginning of compression, p1...
An air-standard dual cycle has a compression ratio of 14. At the
beginning of compression, p1 = 14.5
lbf/in.2, V1 = 0.5 ft3,
and T1 = 50°F. The pressure doubles during the
constant-volume heat addition process.
For a maximum cycle temperature of 3500°R, determine:
(a) the heat addition to the cycle, in Btu.
(b) the net work of the cycle, in Btu.
(c) the percent thermal efficiency.
(d) the mean effective pressure, in lbf/in.2
In an air standard diesel cycle, the conditions of the air at the start of the...
In an air standard diesel cycle, the conditions of the air at
the start of the compression stroke are 2 bar and 30℃. The pressure
rises to 30bar after compression, and through combustion, 1200 kJ
of energy is added per kg air. Calculate
Compression ratio
Cutoff ratio
Mean effective pressure
Temperature and pressure at the end of each process
work done per kg air
Thermal efficiency of the cycle
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...
The state at the beginning of compression of an air-standard Diesel cycle is fixed by p1...
The state at the beginning of compression of an air-standard
Diesel cycle is fixed by p1 = 100 kPa and
T1 = 310 K. The compression ratio is 18 and the
cutoff ratio is 1.5.
Determine:
(a) the maximum temperature, in K.
(b) the pressure at the end of the expansion, in kPa.
(c) the net work per unit mass of air, in kJ/kg.
(d) the percent thermal efficiency.
The state at the beginning of compression of an air-standard Diesel cycle is fixed by p1...
The state at the beginning of compression of an air-standard
Diesel cycle is fixed by p1 = 100 kPa and T1 = 310 K. The
compression ratio is 18 and the cutoff ratio is 1.5. Determine: (a)
the maximum temperature, in K. (b) the pressure at the end of the
expansion, in kPa. (c) the net work per unit mass of air, in kJ/kg.
(d) the percent thermal efficiency
At the beginning of the compression process of an air-standard dual cycle with a compression ratio...
At the beginning of the compression process of an air-standard
dual cycle with a compression ratio of 18, the temperature is 300K
and the pressure is 0.1 MPa. The pressure ratio for the constant
volume part of the heating process is 1:5:1. The volume ratio for
the constant pressure part of the heating process is 1:2:1.
Determine:
(a.) The temperature and pressure at the end of each process of
the cycle.
(b.) The thermal efficiency.
(c.) The mean effective pressure.
The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process,...
The compression ratio of an air-standard Otto cycle is 9.5.
Prior to the isentropic compression process, the air is at 100 kPa,
35°C and 600 cm3 . The temperature at the end of the isentropic
expansion process is 800 K. Using specific heat values at room
temperature (25°C), determine
(a) the highest temperature and pressure in the cycle
(b) the amount of heat transferred in during the cycle (kJ)
(c) the thermal efficiency
(d) the mean effective pressure
Part (a)...
An air-standard Otto cycle operates with a compression ratio of 8. At the start of the...
An air-standard Otto cycle operates with a compression ratio of
8. At the start of the compression stroke, the pressure is 15 psia
and the temperature is 80 degrees F. The maximum pressure in the
cycle is 550 psia. Find a) the thermal efficiency of the cycle, b)
the specific volume at the start of the compression stroke, c) the
specific volume at the end of the compression stroke, and d)
maximum temperature in the cycle.
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