Question
In: Mechanical Engineering
At the beginning of the compression process of an air standard Otto cycle, p1 = 1...
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.7 L. Determine per cylinder: a) the volume at state 1. b) the air mass per cycle. c) the heat addition per cycle, in kJ. d) the heat rejection per cycle, in kJ. e) the net work per cycle, in kJ. f) the thermal efficiency. g) the mean effective pressure, in bar. h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar. i) Devise and evaluate the exergetic efficiency for the cycle.
Solutions
samet mamat answered 1 year agoRelated Solutions
At the beginning of the compression process of an air standard Otto cycle, p1 = 1...
At the beginning of the compression process of an air standard
Otto cycle, p1 = 1 bar, T1
= 300 K. The maximum temperature in the cycle is 2250 K and
the compression ratio is 9.8. The engine has 4 cylinders and an
engine displacement of Vd = 2.0 L. Determine
per cylinder:
a) the volume at state 1.
b) the air mass per cycle.
c) the heat addition per cycle, in kJ.
d) the heat rejection per cycle, in
kJ.
e) the net work...
At the beginning of the compression process of an air standard Otto cycle, p1 = 1...
At the beginning of the compression process of an air standard
Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the
cycle is 2250 K and the compression ratio is 9.8. The engine has 4
cylinders and an engine displacement of Vd = 2.6 L. Determine per
cylinder:
a) the volume at state 1. (IN LITERS) I have tried 2.8L 0.945 L
and 0.789 L but i keep getting it wrong.
b) the air mass...
At the beginning of the compression process of an air standard Otto cycle, p1 = 1...
At the beginning of the compression process of an air standard
Otto cycle, p1 = 1 bar, T1
= 300 K. The maximum temperature in the cycle is 2250 K and
the compression ratio is 9.8. The engine has 4 cylinders and an
engine displacement of Vd = 2.7 L. Determine
per cylinder:
c) the heat addition per cycle, in
kJ.
d) the heat rejection per cycle, in
kJ.
e) the net work per cycle, in kJ.
f) the thermal efficiency.
g) the mean effective...
At the beginning of the compression process of an air standard Otto cycle, p1 = 1...
At the beginning of the compression process of an air standard
Otto cycle, p1 = 1 bar, T1
= 300 K. The maximum temperature in the cycle is 2250 K and
the compression ratio is 9.8. The engine has 4 cylinders and an
engine displacement of Vd = 2.2 L. Determine
per cylinder:
c) the heat addition per cycle, in
kJ.
d) the heat rejection per cycle, in
kJ.
e) the net work per cycle, in kJ.
f) the thermal efficiency.
g) the mean effective...
At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar...
At the beginning of the compression process of an air-standard
Otto cycle, p1 = 1 bar and T1 = 300 K. The compression ratio is 3.5
and the heat addition per unit mass of air is 1400 kJ/kg.
Determine: (a) the maximum temperature of the cycle, in K. (b) the
net work, in kJ/kg. (c) the percent thermal efficiency of the
cycle. (d) the mean effective pressure, in kPa.
At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar,...
At the beginning of the compression process of an air-standard
Otto cycle, p1 = 1 bar, T1 = 290 K, V1 = 400 cm3. The maximum
temperature in the cycle is 2200 K and the compression ratio is 8.
Determine (a) the heat addition, in kJ. kJ (b) the net work, in kJ.
kJ (c) the thermal efficiency. % (d) the mean effective pressure,
in bar. bar (e) Develop a full accounting of the exergy transferred
to the air during...
At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar...
At the beginning of the compression process of an air-standard
Otto cycle, p1 = 1 bar and
T1 = 300 K. The compression ratio is 8.5 and
the heat addition per unit mass of air is 1200 kJ/kg.
Determine:
(a) the maximum temperature of the cycle, in K.
(b) the net work, in kJ/kg.
(c) the percent thermal efficiency of the cycle.
(d) the mean effective pressure, in kPa.
The compression ratio is 10 in the air standard Otto cycle. Pressure at the beginning of...
The compression ratio is 10 in the air standard Otto cycle.
Pressure at the beginning of the compression stroke is 1XY kPa and
the temperature is 15 ºC. The heat transfer to the air for each
cycle is 18XY kJ / kg air. Draw the T-s and P-v diagrams. (x=9
y=8).
Note: Accept that specific temperatures do not change with temperature. Take k = 1.4 and Cp = 1.0031 kJ / kg-K.
a)
For question 1, we draw the temperature...
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 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
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