Homework Answers
The Given data is,
Condensing temprature = 100F = 310.92 K (TH)
Evaporating temratempr = 0 F = 255.37 K (TL)
Hence COP = TL / ( TH - TL)
= 255.37 / ( 310.92 - 255.37)
= 4.59
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oblem 1: An air conditioner based on the theoretical single-stage cycle is using Refrigerant- 134a as...
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An ideal wet compression air conditioner using Refrigerant-22 uses a cycle as diagrammed in figur If the refrigerant is at 30 °F in the evaporator and 110 °F in the condenser, determine a) wkpump; b) qadd; c) qrej; and d) calculate COR an COP. (24 pts) constant pressure lines saturation line saturation line 3A constant pressure lines COnstant constant enthalpy line enthalpy line (b) wet compression cycle
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value 10.00 points Question An air-conditioner with refrigerant-134a s the working fluid is used to keep...
value 10.00 points Question An air-conditioner with refrigerant-134a s the working fluid is used to keep a room at 21°C-Ass by rejecting the waste heat to the outdoor air at 37°C. The room gains heat through the walls and the windows at a rate of 249 kJ/min while the heat generated by the computer, TV, and T lights amounts to 600 W. The refrigerant enters the compressor at 360 kPa as a saturatedV vapor at a rate of 100 L/min...
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An ideal wet compression air conditioner using Refrigerant-22 uses a cycle as diagrammed in figur If the refrigerant is at 30 °F in the evaporator and 110 °F in the condenser, determine a) wkpump; b) qadd; c) qrej; and d) calculate COR an COP. (24 pts) constant pressure lines saturation line saturation line 3A constant pressure lines COnstant constant enthalpy line enthalpy line (b) wet compression cycle
An ideal wet compression air conditioner using Refrigerant-22 uses a cycle as diagrammed...
1. An air conditioning plant using refrigerant R 134a has evaporating and condensing temperatures of 0°C and 35°C, respectively. a) Calculate the refrigerating effect for the plant. If the duty is 352 kW of refrigeration, determine the mass flow rate of refrigerant. b) c) What is the volumetric flow rate under suction conditions? d) Calculate the work done in the compression and the corresponding compressor power e) Evaluate the heat rejected and the rate of heat rejection. f) Calculate the...
Refrigerant 134a flows through an ideal vapor compression heat pump system with a heating capacity of 60,000 Btu/hr. The condenser operates at 200 psi, and the evaporator temperature is 0°F. The refrigerant is a saturated vapor at the evaporator exit and a saturated liquid at the condenser exit. The temperature at the compressor exit is 180°F. Assuming the compressor is not 100% isentropic, determine: a) Mass flow rate (lbm/min) b) Compressor power (hp) c) Isentropic compressor efficiency d) Coefficient of...
Problem 4.040 SI Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady state to 12 bar, 80°C. The volumetric flow rate of the refrigerant entering is 8.5 m3/min. The work input to the compressor is 127.5 kJ per kg of refrigerant flowing Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in kw kW the tolerance is +/-596 Click if you would like to Show...
A Refrigeration System Using R-134A In a refrigeration system, the refrigerant R-134A begins as saturated vapor at -15°(State 1). It then goes through a reversible adiabatic compressor to reach State 2. After flowing through the condenser (a heat exchanger), the refrigerant exits as saturated liquid at 70°C (State 3). It is then throttled by going through an expansion valve, to reach State 4. It finishes the cycle by going through another heat exchanger (the evaporator), to return to State 1....
value 10.00 points Question An air-conditioner with refrigerant-134a s the working fluid is used to keep a room at 21°C-Ass by rejecting the waste heat to the outdoor air at 37°C. The room gains heat through the walls and the windows at a rate of 249 kJ/min while the heat generated by the computer, TV, and T lights amounts to 600 W. The refrigerant enters the compressor at 360 kPa as a saturatedV vapor at a rate of 100 L/min...
5. Refrigerant-134a at 700kPa, 70°C, and 8 kg/min is cooled by air in a condenser until it exits as a saturated liquid at the same pressure. The cooling air enters the condenser at 1MPa and 10°C and leaves at 17°C at the same pressure. Determine: a) Considering only the Refrigerant as a system, the heat transfer rate of a refrigerant from the condenser in (kl/min). R-134a Tables are attached! b) The mass flow rate of the air required for cooling...
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