Question
In: Mechanical Engineering
Fundamentals of Engineering Thermodynamics By Michael J.Moran 8th edition 5.83)Two kilograms of air within a piston-cylinder...
Fundamentals of Engineering Thermodynamics By Michael J.Moran 8th edition
5.83)Two kilograms of air within a piston-cylinder assembly execute a Carnot power cycle with maximum and minimum temperatures of 750 K and 300 K, respectively. The heat transfer to the air during the isothermal expansion is 60kJ. At the end of the isothermal expansion the volume is 0.4m^3. Assuming the ideal gas model for the air, determine
(a) the thermal efficiency (b) the pressure and volume at the beginning of the isothermal expansion, in KPa and m^3, respectively. (c) the work and heat transfer for each of the four processes, in kJ. (d) Sketch the cycle on P-V coordinates.
Solutions
samet mamat answered 2 years agoRelated Solutions
Q2. Two kilograms of air within a piston-cylinder configuration execute a Carnot power cycle between temperatures...
Q2. Two kilograms of air within a piston-cylinder configuration
execute a Carnot power cycle between temperatures 750 K and 300 K.
The isothermal expansion is associated with a heat input of 60 kJ
from the surroundings. The volume after expansion has occurred
isothermally is 0.4 m3 . Assuming air behaves as an ideal gas,
calculate: (i) thermal efficiency for the cycle (ii) pressure and
volume at the beginning of the isothermal expansion, in kPa and m3
, respectively. (iii) the...
Q2. Two kilograms of air within a piston-cylinder configuration execute a Carnot power cycle between temperatures...
Q2. Two kilograms of air within a piston-cylinder configuration
execute a Carnot power cycle between temperatures 750 K and 300 K.
The isothermal expansion is associated with a release of 60 kJ of
heat into the surroundings. The volume after expansion has occurred
isothermally is 0.4 m3 . Assuming air behaves as an ideal gas,
calculate: (i) thermal efficiency for the cycle (ii) pressure and
volume at the beginning of the isothermal expansion, in kPa and m3
, respectively. (iii)...
A piston-cylinder heat engine has five kilograms of air as the working fluid. Analyze this engine...
A piston-cylinder heat engine has five kilograms of air as the
working fluid. Analyze this engine as a Carnot engine and determine
the work of expansion and the amount of heat rejected in KJ
assuming constant specific heat at 300k. During the heat rejection,
the temperature is 300?. There is a temperature difference of 600
degrees in the engine. At the beginning of the heat rejection
process, the pressure is .2MPa and during heat addition the volume
doubles. Draw the...
Two kilograms of CO2 gas is contained in a piston-cylinder assembly at a pressure of 6.5...
Two kilograms of CO2 gas is contained in a
piston-cylinder assembly at a pressure of 6.5 bar and a temperature
of 300 K. The piston has a mass of 5000 kg and surface area of
1m2. The friction of the piston on the walls is
significant and cannot be ignored. The atmospheric pressure is
1.01325 bar. The latch holding the piston in position is suddenly
removed and the gas is allowed to expand. The expansion is arrested
when the volume...
Engineering Mechanics (8th Edition) Chapter 3, Problem 212P
Engineering Mechanics (8th Edition) Chapter 3, Problem 212P
A Carnot heat engine within a piston cylinder has 10 kg of air as the working...
A Carnot heat engine within a piston cylinder has 10 kg of air
as the working fluid and operates between 1000 K and 350 K. During
the heat addition process the pressure changes by a factor of 2.5.
The volume at the end of the isentropic compression process is
5m^3. Determine the pressure at each state in kPa and the net heat
of the cue in KJ assuming Constant Heats at 300 K. Draw a P-v and
T-s diagram
Air within a piston-cylinder assembly execute an ideal Carnot power cycle within maximum and minimum temperatures...
Air within a piston-cylinder assembly execute an ideal Carnot
power cycle within maximum and minimum temperatures of 600 K and
300 k, respectively. The heat added at the high temperature is 250
kJ/kg. The lowest pressure in the cycle is 75 kPa. Assuming the
ideal gas model for the air (constant cv, cp, k, with the following
properties: kair = 1.4, cv,air = 0.717 J/g.K, Mair = 28.97 g/mol,
Universal Gas Constant 8.314 /( . ) _ R = J...
Air within a piston cylinder assembly executes a Carnot refrigeration cycle between hot and cold reservoirs...
Air within a piston cylinder assembly executes a Carnot
refrigeration cycle between hot and cold reservoirs at TH=500 K and
TC=300 K, respectively. The magnitude of the heat transfer rejected
to the high temperature reservoir is 250 kJ per kg of air. The
pressure at the start of the isothermal expansion is 325 kPa. The
air can be modeled as an ideal gas with constant specific
heat.
For the air as a system, determine
a. (5) the coefficient of performance....
Air within a piston–cylinder assembly, initially at 15 lbf/ in.2, 510°R, and a volume of 6...
Air within a piston–cylinder assembly, initially at 15 lbf/
in.2, 510°R, and a volume of 6 ft3, is
compressed isentropically to a final volume of 1.75
ft3.
Assuming the ideal gas model with k = 1.4 for the air,
determine the:
(a) mass, in lb.
(b) final pressure, in lbf/in.2
(c) final temperature, in °R.
(d) work, in Btu.
Two moles of nitrogen gas at 25°C, confined within a cylinder by a piston maintaining a...
Two moles of nitrogen gas at 25°C, confined within a cylinder by
a piston maintaining a constant pressure of 1 atm, is heated with
5.30 kJ of energy. Assume all the energy is used to do work of
expansion of the gas at 1 atm. What will be the final temperature
of the gas? Recall ∆H = ∆E + P∆V and watch your units!
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