Question

A refrigerator runs on the vapor-compression cycle. The boiler operates at T=265 K and the condenser...

A refrigerator runs on the vapor-compression cycle. The boiler operates at T=265 K and the condenser operates at 305 K. The compressor has an efficiency of 85%.

a. What is the maximum attainable coefficient of performance for Freon 22?

b. What is the maximum attainable coefficient of performance for refrigerant R-422A?

Homework Answers

Answer #1

The detailed steps are given below

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Regarding a Vapor-Compression cycle: A refrigerant (HCFC-22) enters the compressor of a refrigerator as a superheated...
Regarding a Vapor-Compression cycle: A refrigerant (HCFC-22) enters the compressor of a refrigerator as a superheated vapor at .14MPa and -20 degrees Celsius at a rate of .05 kg/s and leaves at .8 MPa and 50 degrees Celsius. The refrigerant is cooled in the condenser to 26 degrees Celsius and .72MPa and is then throttled down to .15 MPa. Determine the rate of heat removal from the refrigerated space and the power input to the compressor and the Coefficient of...
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 8 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, (1 ton = 3.5168 kW) and, (c) the coefficient of performance, (d) rate of entropy production in kW/K, for the...
An idea vapor-compression refrigeration cycle, with refrigerant R-22 as the working fluid, has an evaporator temperature...
An idea vapor-compression refrigeration cycle, with refrigerant R-22 as the working fluid, has an evaporator temperature of -12 °C and a condenser pressure of 15 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The refrigerating capacity is 4 tons. a.Determine the compressor power (in kW). b.Determine the mass flow rate of the refrigerant (in kg/min). c.Determine the coefficient of performance.
Consider a commercial refrigerator which operates on the refrigeration cycle. R- 134a is used as the...
Consider a commercial refrigerator which operates on the refrigeration cycle. R- 134a is used as the working uid and the refrigerated space is kept at -25oC by rejecting its waste heat to cooling water that enters the condenser at room temperature, that is 20oC, at a rate of 0.1 kg/s and leaves at 40oC. The refrigerant enters the condenser at 1.2 MPa and 70oC and leaves at 40oC. The inlet state of the compressor is saturated vapor at 100 kPa...
Consider the vapor compression refrigeration cycle with tetrafluoroethane as refrigerant. If the evaporation temperature is 261.15...
Consider the vapor compression refrigeration cycle with tetrafluoroethane as refrigerant. If the evaporation temperature is 261.15 K, show the effect of condensation temperature on the coefficient of performance by making calculations for condensation temperature of 288.75 K and 300.15 K. Assume that vapor compression process isentropic and compressor efficiency is 80 %
An ideal vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid....
An ideal vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at 1 bar, and saturated liquid exits the condenser at 4 bar. The mass flow rate of refrigerant is 8.5 kg/min. Determine the compressor power, in kW.
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 2.6 bar, and saturated liquid exits the condenser, which operates at 8 bar. Determine for an isentropic compressor efficiency of 85%: (a) the refrigerant mass flow rate, in kg/s. (b) the magnitude of the compressor power, in kW. (c) the coefficient of performance.
Refrigerant 134a is the working fluid in an ideal vapor-compression refrigeration cycle operating at steady state....
Refrigerant 134a is the working fluid in an ideal vapor-compression refrigeration cycle operating at steady state. Refrigerant enters the compressor at 1 bar, -12°C, and the condenser pressure is 9 bar. Liquid exits the condenser at 32°C. The mass flow rate of refrigerant is 7 kg/min. Determine: (a) the magnitude of the compressor power, in kW. (b) the refrigeration capacity, in tons. (c) the coefficient of performance.
Refrigerant 134a is the working fluid in a vapor-compression heat pump system with a heating capacity...
Refrigerant 134a is the working fluid in a vapor-compression heat pump system with a heating capacity of 60,000 Btu/h. The condenser operates at 240 lbf/in.2, and the evaporator temperature is 0°F. The refrigerant is a saturated vapor at the evaporator exit and a liquid at 110°F at the condenser exit. Pressure drops in the flows through the evaporator and condenser are negligible. The compression process is adiabatic, and the temperature at the compressor exit is 180°F. Determine (a) the mass...
An ice-making machine operates on the ideal vapor-compression cycle, using refrigerant-134a. The refrigerant enters the compressor...
An ice-making machine operates on the ideal vapor-compression cycle, using refrigerant-134a. The refrigerant enters the compressor as saturated vapor at 20 psia and leaves the condenser as saturated liquid at 80 psia. Water enters the ice machine at 55°F and leaves as ice at 25°F. For an ice production rate of 15 lbm/h, determine the power input to the ice machine (169 Btu of heat needs to be removed. Compressor's efficiency is 90 percent