A Carnot engine operates on air between high and low pressures
of 3 MPa and 100...
A Carnot engine operates on air between high and low pressures
of 3 MPa and 100 kPa with a low temperature of 20°C. For a
compression ratio of 15, calculate
A heat engine operates between a high-temperature reservoir at
610 K and a low-temperature reservoir at 320 K. In one cycle, the
engine absorbs 6800 J of heat from the high-temperature reservoir
and does 2200 J of work.
A) What is the net change in entropy as a result of this
cycle?
A Carnot heat engine operates between two thermal
reservoirs ( T1 > T2 ) to generate as much power as required as
to drive a machine ( input power requirement of 30 kW ) plus to
drive an ideal heat pump working between 2 temperature limits ( T3
and T4 ) ( T3 > T4 ) . The pump takes 17 kW of heat from the low
temperature reservoir where T1 = 1200K, T2= T3 =335 K, T4 = 278...
(10 pts) A simple Rankine cycle operates between the pressures
of 10 kPa and 6 MPa. Steam exits the boiler at 550oC,
liquid exits the condenser at 40oC, the “wet steam”
exiting the turbine has a quality of 90%, the pump efficiency is
64% and the net power output from the system is 87.2 MW.
Determine:
(2 pts) The mass flow rate through the system, in kg/s.
(2 pts) The rate of heat rejection from the condenser, in
kW.
(2...
An engine operates in a Carnot cycle. At point A in the cycle,
2.34 mol of a monatomic ideal gas has a pressure of 1,400 kPa, a
volume of 10.0 L, and a temperature of 720 K. The gas expands
isothermally to point B and then expands adiabatically to point C,
where its volume is 24.0 L. An isothermal compression brings it to
point D, where its volume is 15.0 L. An adiabatic process returns
the gas to point A....
A Carnot engine operates between temperatures of 200 K and 350
K. In each cycle, 4000 J of heat is added to the ideal gas. This
engine works on 0.5 mols of a diatomic gas.
A) Calculate the volume ratio for just the adiabatic
expansion.
B) Determine the compression ratio - the highest volume divided
by the lowest.
C) If you reversed the cycle, how much work would be necessary
to pull 100 J of heat from the cold temperature...
A Carnot heat engine operates between temperature levels of 600
K and 300 K with 8 MW heat transferred in the boiler. It drives a
compressor, which compresses steam from 200 kPa, 200°C to 1 MPa,
500°C. If mass flow rate of the steam is 5 kg/s. determine the
following:
(a) The power output of the heat engine (kW).
(b) The power input of the compressor (kW).
(c) The efficiency of the compressor.
A Carnot engine uses air as the working substance, receives heat
at a temperature of 315oC, and rejects it at
65oC. The maximum possible cycle pressure is 6.0MPa and
the minimum volume is 0.95 liters. When heat is added, the volume
increases by 250%. Determine the pressure and volume at each state
in the cycle.
8-12)A heat engine operates in a Carnot cycle between 84.0°C and
355°C. It absorbs 21,600 J of energy per cycle from the hot
reservoir. The duration of each cycle is 3.00 s.
(a) What is the mechanical power output of this engine?
kW
(b) How much energy does it expel in each cycle by heat?
kJ
12)A Carnot engine operates between 105°C and 18°C. How much ice
can the engine melt from its exhaust after it has done 4.0 ✕...
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
Consider an automobile engine which operates on the ideal Otto
cycle. In this engine, air is compressed with a compression ratio
of 10. At the beginning of the compression process, air is at 105
kPa and 17oC, and in the combustion process 640 kJ/kg of heat is
added to air. Taking into account the variation of specific heats
with temperature, determine (a) the pressure and temperature at the
end of the heat-addition (combustion) process, (b) the net work
output, (c)...