Question
In: Mechanical Engineering
How many constant volume processes are modeled when analyzing an Air Standard Diesel cycle? Question 10...
How many constant volume processes are modeled when analyzing an Air Standard Diesel cycle?
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Solutions
samet mamat answered 2 years agoRelated Solutions
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
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
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
c) Find the temperature at the end of the compression stroke
d) Find the Pressure at the end...
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)
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...
One kilogram of air is taken through a constant volume cycle. At the commencement of the...
One kilogram of air is taken through a constant volume cycle. At
the commencement of the adiabatic compression, the pressure and
temperature are 103 kN/m2 and 1000C
respectively. The adiabatic compression has a volume ratio of 6:1.
The maximum pressure of the cycle is 3.45 MN/m2.
Determine, for the cycle,
the pressure, volume and temperature at each of the cycle
process change points,
[8]
the heat transferred to the air,
[3]
the heat rejected by the air,...
An Otto Cycle engine operation at cold-air standard has a volume of 0.1908 at the beginning...
An Otto Cycle engine operation at cold-air standard has a volume
of 0.1908 at the beginning of isentropic compression. If the
compression ratio is 12.5, how much heat is released from the fuel
per kg of fuel burned if the fuel consumption is 0.02 kg/min? The
mean effective pressure is 350kPa.
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...
1. Explain how the following systems work: a. Constant-volume dual-duct system b. Variable air volume reheat...
1. Explain how the following systems work:
a.
Constant-volume dual-duct system
b.
Variable air volume reheat system
c.
Fan Terminal Units
d.
Fan Coils
e.
Variable Refrigerant Flow (VRF)
f.
Radiant Heating and Cooling
g.
Chilled Beam
h.
Radian Floor System
i.
Water source heat pump
j.
Dedicated outside air system
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