Note: RE means Refrigerant Effect.
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An ideal vapor-compression refrigeration cycle with R-134a as the working fluid has an evaporator temperature of-15...
An ideal vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at 1.25 bar, and saturated liquid exits the condenser at 5 bar. The mass flow rate of refrigerant is 8.5 kg/min. A. Determine the magnitude of the compressor power input required, in kW (report as a positive number). B. Determine the refrigerating capacity, in tons. C. Determine the coefficient of performance. Please answer all parts of the question. Thanks!
Problem #1 [30 Points] Vapor Compression Refrigeration Cycle An ideal vapor compression refrigeration system cycle, with ammonia as the working fluid, has an evaporator temperature of -20°C and a condenser pressure of 12 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The mass flow rate of refrigerant is 3 kg/minute. Determine the coefficient of performance and the refrigerating capacity in tons. Given: Find: T-s Process Diagram: Schematic Assume:
Thermodynamics. No interpolation needed. Problem #3. Refrigerant 134a is the working fluid for vapor-compression refrigeration cycle. The evaporator temperature is 8°C and the condenser pressure is 12 bar. Saturated vapor enters the compressor and superheated vapor enters the condenser at 60°C and exits the condenser as saturated liquid. For a refrigeration capacity of 8 tons or 2.816 x104 J/s determine the following: (1) The refrigerant mass flow rate in kg/s; (2) The compressor isentropic efficiency [Hint: Interpolation is required); (3)...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22 °C. There are irreversibilities in the compressor. The refrigerant enters the condenser at 16 bar and 160 °C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. Calculate the coefficient of performance, b, and the isentropic compressor efficiency, defined as: 2s Condenser Expansion...
A vapor compression refrigeration system operates at steady state with refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 10 lbf/in2 , 0 oF. The liquid leaving the condenser is at 180 lbf/in2 , 100 oF. There is no significant pressure drop in the evaporator or condenser. For compressor efficiency of 83% and refrigeration capacity of 6 tons, determine (a) the compressor power input in horsepower, and (b) the coefficient of performance. A vapor compression refrigeration system...
Refrigerant 134a is the working fluid in an ideal vapor-compression refrigeration cycle. Saturated vapor enters the compressor at h = 400 J/kg and saturated liquid leaves the condenser at h= 242 J/kg. If the mass flow rate of the refrigerant is 0.08 kg/s, and superheated vapor exits the compressor at h = 420 J/kg, pression work will be equal to 1.6 kW inch-h) 6.08(420 - 6oo) = 1.6
In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22°C. The refrigerant enters the condenser at 16 bar and 160°C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. If the refrigerating capacity is 150 kW, determine: (a) the mass flow rate of the refrigerant, in kg/s. (b) the power input to the...
In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22°C. The refrigerant enters the condenser at 16 bar and 190°C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. If the refrigerating capacity is 50 kW, determine: (a) the mass flow rate of the refrigerant, in kg/s. (b) the power input to the...