Question
In: Mechanical Engineering
A Diesel cycle engine is analyzed using the air standard method. Given the conditions at state...
A Diesel cycle engine is analyzed using the air standard method. Given the conditions at state 1, compression ratio (r), and cutoff ratio (rc) determine the efficiency and other values listed below.
Note: The gas constant for air is R=0.287 kJ/kg-K.
Given Values
T1 (K) = 338
P1 (kPa) = 130
r = 14.5
rc = 1.25
a) Determine the specific internal energy (kJ/kg) at state 1.
b) Determine the relative specific volume at state 1.
c) Determine the relative specific volume at state 2.
d) Determine the temperature (K) at state 2.
e) Determine the pressure (kPa) at state 2.
f) Determine the specific enthalpy (kJ/kg) at state 2.
g) Determine the temperature (K) at state 3.
h) Determine the pressure (kPa) at state 3.
i) Determine the specific enthalpy (kJ/kg) at state 3.
j) Determine the relative specific volume at state 3.
k) Determine the relative specific volume at state 4.
l) Determine the temperature (K) at state 4.
m) Determine the pressure (kPa) at state 4.
n) Determine the specific internal energy (kJ/kg) at state 4.
o) Determine the net work per cycle (kJ/kg) of the engine.
p) Determine the heat addition per cycle (kJ/kg) of the engine.
q) Determine the efficiency (%) of the engine.
Solutions
samet mamat answered 3 months agoRelated Solutions
A Dual cycle engine is analyzed using the air standard method. Given the conditions at state...
A Dual cycle engine is analyzed using the air standard
method. Given the conditions at state 1, compression ratio (r),
pressure ratio (rp), and cutoff ratio (rc) determine the efficiency
and other values listed below.
Note: The gas constant for air is R=0.287
kJ/kg-K.
Given Values
T1 (K) = 334
P1 (kPa) = 115
r = 11.5
rp = 1.34
rc = 1.14
a) Determine the specific internal energy (kJ/kg) at state
1.
b) Determine the relative specific volume at...
A Dual cycle engine is analyzed using the cold air standard method. Given the conditions at...
A Dual cycle engine is analyzed using the cold air
standard method. Given the conditions at state 1, compression ratio
(r), and cutoff ratio (rc) determine the efficiency and other
values listed below.
Note: The specific heat ratio and gas constant for air
are given as k=1.4 and R=0.287 kJ/kg-K respectively.
Given Values
T1 (K) = 316
P1 (kPa) = 170
r = 18
rp = 1.44
rc = 1.22
a) Determine the specific internal energy (kJ/kg) at state
1....
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
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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
A CI engine operating on the air standard diesel cycle has cylinder condtioons at the start...
A CI engine operating on the air standard diesel cycle has
cylinder condtioons at the start of compression of 65 degrees C and
130 kPa. light diesel fuel is used at an equivalence ratio of 0.8
with a combustion efficiency of 0.98. compression ratio = 18
Calculate:
temperature and pressure in each state of the cycle (0c)
pressure at each state of the cycle (kpa)
cutoff ratio
indicated thermal efficiency (%)
heat lost in exhaust (KJ/Kg)
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
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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
a)State the ideal cycle most appropriate to the actual operations undergone the modem Diesel engine ....
a)State the ideal cycle most appropriate to the actual
operations undergone the modem Diesel engine .
b)give reasons why the actual cycle is made approximate to the
ideal heat exchange process.
c) state how the combustion process in the actual cycle is
made approximate to the ideal heat exchange process.
An air engine is modeled after the ott cycle. Assume ideal gas and air standard cold...
An air engine is modeled after the ott cycle. Assume ideal gas
and air standard cold valus for properties. Intake air is at 100kPa
and Temperature of 27°C. The compression ration is 8:1. The heat
added during ignition is 1740 kJ/kg
a) Draw and Label the Pv and Ts diagrams for the Otto cycle
b)Find the specific volume at intake state #1
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d) Find the Pressure at the end...
Thermodynamics problem: An engine operates on an air-standard Otto cycle. The pressure and temperature of the...
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pressure, volume, and temperature at end of each step.
compression ratio.
heat input and heat rejected per mol of working fluid.
thermal efficiency of the cycle.
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per kg of fuel burned if the fuel consumption is 0.02 kg/min? The
mean effective pressure is 350kPa.
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