Question
In: Mechanical Engineering
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26oC with...
Refrigerant 134a enters an insulated compressor operating at
steady state as saturated vapor at -26oC with a
volumetric flow rate of 0.18 m3/s. Refrigerant exits at
8 bar, 70oC. Changes in kinetic and potential energy
from inlet to exit can be ignored.
Determine the volumetric flow rate at the exit, in m3/s,
and the compressor power, in kW.
Solutions
Expert Solution
In this problem, the specific enthalpy and specific volume of Refrigerant is taken from R-134a table at both state of the compressor and then Calculate mass flow rate of Refrigerant, volumetric flow rate at exit and compressor power as below:-
samet mamat answered 2 years agoRelated Solutions
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -20oC with...
Refrigerant 134a enters an insulated compressor operating at
steady state as saturated vapor at -20oC with a
volumetric flow rate of 0.18 m3/s. Refrigerant exits at
9 bar, 70oC. Changes in kinetic and potential energy
from inlet to exit can be ignored.
Determine the volumetric flow rate at the exit, in m3/s,
and the compressor power, in kW.
Refrigerant-134a enters an adiabatic compressor as saturated vapor at 160 kPa at a rate of 2.8...
Refrigerant-134a enters an adiabatic compressor as saturated
vapor at 160 kPa at a rate of 2.8 m3/min and is
compressed to a pressure of 900 kPa. Determine the minimum power
that must be supplied to the compressor. Use the tables for
R-134a.
The minimum power that must be supplied to the compressor
Saturated water vapor at 300F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300F enters a compressor operating at
steady state with a mass flow rate of 5 lb/s and is compressed
adiabatically to 750 psi.
Determine:
a) The percent isentropic compressor efficiency.
b) The rate of entropy production, in hp/R.
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300°F enters a compressor operating at
steady state with a mass flow rate of 5 lb/s and is compressed
adiabatically to 750 lbf/in.2
If the power input is 2150 hp, determine for the compressor:
(a) the percent isentropic compressor efficiency and
(b) the rate of entropy production, in hp/°R.
Ignore kinetic and potential energy effects.
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300°F enters a compressor operating at
steady state with a mass flow rate of 5 lb/s and is compressed
adiabatically to 650 lbf/in.2
If the power input is 2150 hp, determine for the compressor:
(a) the percent isentropic compressor efficiency and
(b) the rate of entropy production, in hp/°R.
Ignore kinetic and potential energy effects.
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300°F enters a compressor operating at
steady state with a mass flow rate of 5 lb/s and is compressed
adiabatically to 650 lbf/in.2
If the power input is 2150 hp, determine for the compressor:
(a) the percent isentropic compressor efficiency and
(b) the rate of entropy production, in hp/°R.
Ignore kinetic and potential energy effects.
Refrigerant 134a at p1 = 30 lbf/in2, T1 = 40oF enters a compressor operating at steady...
Refrigerant 134a at p1 = 30
lbf/in2, T1 =
40oF enters a compressor operating at steady state with
a mass flow rate of 400 lb/h and exits as saturated vapor at
p2 = 160 lbf/in2. Heat
transfer occurs from the compressor to its surroundings, which are
at T0 = 40oF. Changes in kinetic and
potential energy can be ignored. The power input to the compressor
is 4 hp.
Determine the heat transfer rate for the compressor, in Btu/hr, and
the...
Refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -4oC and...
Refrigerant 134a enters the evaporator of a refrigeration system
operating at steady state at -4oC and a quality of 20% at a
velocity of 6 m/s. At the exit, the refrigerant is a saturated
vapor at -4oC. The evaporator flow channel has constant diameter of
1.7 cm. Determine the mass flow rate of the refrigerant, in kg/s,
and the velocity at the exit, in m/s.
A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated...
A vapor-compression refrigeration cycle operates at steady state
with Refrigerant 134a as the working fluid. Saturated vapor enters
the compressor at 2 bar, and saturated liquid exits the condenser
at 10 bar. The isentropic compressor efficiency is 80%. The mass
flow rate of refrigerant is 7 kg/min.
Determine:
(a) the compressor power, in kW.
(b) the refrigeration capacity, in tons.
(c) the coefficient of performance.
refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -12°C and...
refrigerant 134a enters the evaporator of a
refrigeration system operating at steady state at -12°C and a
quality of 20% at a velocity of 7 m/s. At the exit, the refrigerant
is a saturated vapor at -12°C. The evaporator flow channel has
constant diameter of 1.7cm.
Determine the mass flow rate of the refrigerant in
kg/s
Determine the velocity at the exit in m/s
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