Question
In: Physics
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370 T (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine,
(a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram)
(b) the network output
(c) the thermal efficiency
(d) the mean effective pressure for the cycle.
The gas constant of air is R = 0.287 kJ/kg.K
(Describe the necessary assumptions you have considered in your solutions.)
Solutions
genius_generous answered 1 year agoRelated Solutions
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...
In an Otto cycle air is compressed from an initial
pressure 120 kPa and temperature 370 T (K). The cycle has
compression ratio of 10. In the constant volume heat addition
process 1000 kJ/kg heat is added into the air. Considering
variation on the specific heat of air with temperature,
determine,
(a) the pressure and temperature at the end of heat
addition process (show the points on P-v diagram)
(b) the network output
(c) the thermal efficiency
(d) the mean...
QUESTION NO 1 In an Otto cycle air is compressed from an initial pressure 120 kPa...
QUESTION NO 1
In an Otto cycle air is compressed from an initial pressure 120
kPa and temperature (T = 380). The cycle has compression ratio of
10. In the constant volume heat, addition process 1000 kJ/kg heat
is added into the air. Considering variation on the specific heat
of air with temperature, determine,
(a) the pressure and temperature at the end of heat addition
process (show the points on P-v diagram)
(b) the network output
(c) the thermal efficiency...
Thermodynamics problem: An engine operates on an air-standard Otto cycle. The pressure and temperature of the...
Thermodynamics problem:
An engine operates on an air-standard Otto cycle. The pressure
and temperature of the isentropic compression 100 kPa and 40 °C,
respectively. The pressure at the end of compression is 2.0 MPa and
the net work is 87,000 J/mol. Assume ideal air-standard cycle.
Determine the following:
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.
A cold air-standard Otto cycle has a compression ratio of 6 and the temperature and pressure...
A cold air-standard Otto cycle has a compression ratio of 6 and
the temperature and pressure at the beginning of the compression
process are 520°R and 14.2 lbf/in.2, respectively. The heat
addition per unit mass of air is 500 Btu/lb. Assume constant
specific heats evaluted at 520°R. Determine:
(a) the maximum temperature, in °R.
(b) the maximum pressure, in lbf/in.2
(c) the percent thermal efficiency.
(d) the mean effective pressure, in lbf/in.2
I need solving question 2 only? Q1. In an Otto cycle air is compressed from an...
I need solving question 2 only?
Q1.
In an Otto cycle air is compressed from an initial
pressure 120 kPa and temperature 350 (K). The cycle has compression
ratio of 10. In the constant volume heat addition process 1000
kJ/kg heat is added into the air. Considering variation on the
specific heat of air with temperature, determine,
(a) the pressure and temperature at the end of heat
addition process (show the points on P-v diagram)
(b) the network output
(c)...
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.
air at a temperature of 500c id compressed at a constant pressure of 1.2mpa from a...
air at a temperature of 500c id compressed at a constant
pressure of 1.2mpa from a volume of 2cu meters to volume of 0.4 cu
meters. If the initial internal energy decrease 4820kj find a. The
work done during the reversible process b. The heat transfered c.
The change of enthalpy.
Air of 0.5 kg mass is compressed in a piston-cylinder device from 300 K, 120 kPa...
Air of 0.5 kg mass is compressed in a piston-cylinder device
from 300 K, 120 kPa to 500K, 940 kPa. (a) Determine the entropy
change in kJ/K using (i) approximate analysis and (ii) exact
analysis. (b) Determine the direction of heat transfer (into the
device or out of the device).
Air is compressed from 100 Kpa and 22 C to an outlet pressure 8 times greater....
Air is compressed from 100 Kpa and 22 C to an outlet pressure 8
times greater. The compressor is not well insulated and loses heat
at a rate of 120 kJ/kg. It is also note that there is a decrease in
the entropy of the air of 0.4 kJ/kg-K between the inlet & the
outlet. Assuming constant specific heats determine a) The outlet
air temperature b) The required work input (kJ/kg) c) The entropy
generation sgen (kJ/kg-K) during the compression...
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