Question
In: Mechanical Engineering
During a compression process, 35 (kg/min) of R-134a at 0.6 (bar) and 0 (°C) is continuously...
During a compression process, 35 (kg/min) of R-134a at 0.6 (bar) and 0 (°C) is continuously sent through a pipe system with an internal diameter of 3 (in.). The discharge pressure is 0.5 (MPa) and 30 (°C). The inside diameter of the tube is 1 (in.). During the process, heat is transmitted at a rate of 9 (kJ/s). Calculate the power produced by the compressor, consider g = 9.81 (m/s^2 ).
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samet mamat answered 1 year agoRelated Solutions
Consider a vapour compression refrigeration cycle that uses R-134a as refrigerant. The R-134a enter
Consider a vapour
compression refrigeration cycle
that uses R-134a as
refrigerant. The R-134a
enters the compressor
as a saturated
vapour at 200 kPa,
and exits the
condenser as a
saturated liquid at
900 kPa. The rate
of refrigeration of
the cycle is to
be 6.0 tons of
refrigeration (1 ton
of refrigeration =
3.517 kW). The
compressor isentropic
efficiency is 80%.
Determine: a) The temperature
of evaporation and
condensation of the
refrigerant; b) Mass flow
of the refrigerant
R-134a, in ...
Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 35 kW to...
Refrigerant 134a is the working fluid in a vapor-compression
heat pump that provides 35 kW to heat a dwelling on a day when the
outside temperature is below freezing. Saturated vapor enters the
compressor at 2.1 bar, and saturated liquid exits the condenser,
which operates at 8 bar.
Determine for an isentropic compressor efficiency of 75%:
(a) the refrigerant mass flow rate, in kg/s.
(b) the magnitude of the compressor power, in kW.
(c) the coefficient of performance.
A tank with a volume of 0.6 m3 contains 12 kg of refrigerant-134a at -220C. Calculate...
A tank with a volume of 0.6 m3 contains 12 kg of
refrigerant-134a at -220C. Calculate the pressure of the
refrigerant (a), (b) the total internal energy (kJ) and (c) the
volume occupied by the liquid phase (m3).
For an ideal vapor-compression heat pump cycle, refrigerant 134a is used to provide 35 kW of...
For an ideal vapor-compression heat pump cycle, refrigerant 134a
is used to provide 35 kW of heat to a building. Saturated vapor
enters the compressor at 1.6 bar and saturated liquid exits the
condenser which operates at 8 bar. What is (a) the mass flow rate
of the refrigerant, and (b) the COP?
Estimate the following: The volume occupied by 18 kg of ethylene at 55°C and 35 bar....
Estimate the following:
The volume occupied by 18 kg of ethylene at 55°C and 35 bar.
The mass of ethylene contained in a 0.25-m3 cylinder
at 50°C and 115 bar.
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10 degrees C and delivers it at...
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10 degrees C
and delivers it at 1000 kPa, 40oC. The power input is measured to
be 3 kW. The compressor has heat transfer to air at 100 kPa coming
in at 20 degrees C and leaving at 25 degrees C.
I'm trying to find the mass flow rate of air, BUT can you please
just show me the energy balance and Schematic to set this up.
JUST the energy balance...
During isobaric process m=64 kg of wet water stream at temperature t=262.7?C and pressure p=49 bar...
During isobaric process m=64 kg of wet water stream at
temperature t=262.7?C and pressure p=49 bar changed its specific
volume from v1 =0.0018 m3/kg to v2=0.035 m3/kg. Find initial and
final quality of steam, change of internal energy of steam, work
done by steam, amount of heat exchanged with surroundings. Draw the
process at the enthalpy-entropy diagram. From tables for p=49 bar:
v’=0.0013 m3/kg, v”=0.0403 m3/kg, h’= 1148.4 KJ/kg, h”= 2794.7
KJ/kg
At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar...
At the beginning of the compression process of an air-standard
Otto cycle, p1 = 1 bar and T1 = 300 K. The compression ratio is 3.5
and the heat addition per unit mass of air is 1400 kJ/kg.
Determine: (a) the maximum temperature of the cycle, in K. (b) the
net work, in kJ/kg. (c) the percent thermal efficiency of the
cycle. (d) the mean effective pressure, in kPa.
At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar,...
At the beginning of the compression process of an air-standard
Otto cycle, p1 = 1 bar, T1 = 290 K, V1 = 400 cm3. The maximum
temperature in the cycle is 2200 K and the compression ratio is 8.
Determine (a) the heat addition, in kJ. kJ (b) the net work, in kJ.
kJ (c) the thermal efficiency. % (d) the mean effective pressure,
in bar. bar (e) Develop a full accounting of the exergy transferred
to the air during...
At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar...
At the beginning of the compression process of an air-standard
Otto cycle, p1 = 1 bar and
T1 = 300 K. The compression ratio is 8.5 and
the heat addition per unit mass of air is 1200 kJ/kg.
Determine:
(a) the maximum temperature of the cycle, in K.
(b) the net work, in kJ/kg.
(c) the percent thermal efficiency of the cycle.
(d) the mean effective pressure, in kPa.
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