Question
In: Mechanical Engineering
The flow rate of warm air into the air conditioning is 5,000 cfm. An air conditioning...
The flow rate of warm air into the air conditioning is 5,000 cfm. An air conditioning system takes outdoor air at 95 degrees F dry-bulb and 70% relative humidity, and discharges it at 60 degrees F dry-bulb and 95% relative humidity. The air conditioning system operates on a vapor compression cycle using R134a between 20 and 200 psia. Refrigerant enters the compressor at 20 degrees F and leaves the compressor at 180 degrees F. Refrigerant enters the evaporator coil at a quality of x = 0.3. Determine a) The quantity of water removed from the air, in lb/min. b) The quantity of heat removed from the air, in tons. c) The mass flow rate of refrigerant, in lb/s. d) The compressor's power requirement, in hp.
Solutions
samet mamat answered 2 years agoRelated Solutions
Air (cp = 1.0 kJ/kgK) enters an air conditioning system at 40C with a mass flow...
Air (cp = 1.0 kJ/kgK) enters an air conditioning system at 40C
with a mass flow rate of 1.5 kg/s. The air is cooled by exchanging
heat with a stream of R-134a refrigerant that enters the heat
exchanger at -8C and 20% quality, and exits with 100% quality. If
25 kW of heat is transferred out of the air, determine: (40 pts) i)
Mass flowrate of R-134a (kg/hr) ii) Exit temperature of air (C)
iii) Exit pressure of R-134a (kPa)
There are 5000 CFM of outdoor air with a temp of 40F 35Fwb heated and humidified...
There are 5000 CFM of outdoor air with a temp of 40F
35Fwb heated and humidified under steady-flow conditions to a final
temp of 70F and 40%RH a)find the mass of water vapor added to each
pound mass of dry air b) if the water is supplied at 50F how much
heat in Btu/min.
Please answer fast
There are 5000 CFM of outdoor air with a temp of 40F 35Fwb heated and humidified...
There are 5000 CFM of outdoor air with a temp of 40F 35Fwb
heated and humidified under steady-flow conditions to a final temp
of 70F and 40%RH a)find the mass of water vapor added to each pound
mass of dry air b) if the water is supplied at 50F how much heat in
Btu/min.
Air is heated from 25c to 150c . The flow rate of air at the exit...
Air is heated from 25c to 150c . The flow rate of air at the
exit of the heater is 1.25m^3/min and the air pressure is 122 Kpa
absolut .
calculate the heat requirement in KW , assuming ideal gas
behavior and that the kinetic & potential energy are
negligible.
5. You are an air-conditioning systems designer, and you have been tasked with developing an air-conditioning...
5. You are an air-conditioning systems designer, and
you have been tasked with developing an air-conditioning system
(cooling only) for lecture theatre building 32 on ECU’s Joondalup
Campus. As a first step you will need to develop a model of the
system, explain how you would go about this by providing answers to
the following:
a. The steps that you would take when developing a mathematical
model of the system and what information you would need
b. List all of...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of...
Air enters the compressor of a regenerative air-standard Brayton
cycle with a volumetric flow rate of 100 m3/s at 0.8 bar, 280 K.
The compressor pressure ratio is 20, and the maximum cycle
temperature is 1800 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%. For a regenerator effectiveness of 86%, determine: (a) the net
power developed, in MW. (b) the rate of heat addition in the
combustor, in MW. (c)...
Air enters the compressor of an air-standard Brayton cycle with a volumetric flow rate of 60...
Air enters the compressor of an air-standard Brayton cycle with
a volumetric flow rate of 60 m3/s at 0.8 bar, 280 K. The
compressor pressure ratio is 17.5, and the maximum cycle
temperature is 1950 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%.
Determine:
(a) the net power developed, in kW.
(b) the rate of heat addition in the combustor, in kW.
(c) the percent thermal efficiency of the cycle....
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of...
Air enters the compressor of a regenerative air-standard Brayton
cycle with a volumetric flow rate of 60 m3/s at 0.8 bar,
280 K. The compressor pressure ratio is 20, and the maximum cycle
temperature is 1950 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%.
For a regenerator effectiveness of 86%, determine:
(a) the net power developed, in MW.
(b) the rate of heat addition in the combustor, in MW.
(c)...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of...
Air enters the compressor of a regenerative air-standard Brayton
cycle with a volumetric flow rate of 20 m3/s at 0.8 bar,
280 K. The compressor pressure ratio is 20, and the maximum cycle
temperature is 1950 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%.
For a regenerator effectiveness of 86%, determine:
(a) the net power developed, in MW.
(b) the rate of heat addition in the combustor, in MW.
(c)...
Ethane (C2H6) is burned with air in a steady-flow combustor. The mass flow rate of fuel...
Ethane (C2H6) is burned with air in a
steady-flow combustor. The mass flow rate of fuel entering the
combustor is 0.57 kg/s and the equivalence ratio is 0.64. The fuel
enters at 25oC and the air enters at 500 K.
Determine:
The heat release rate, in kW.
The mass flow rate of air, in kg/s.
The mole fraction of O2 in the products.
The mass fraction of CO2 in the products.
The total mass of CO2 produced per year (365...
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