Question

In: Mechanical Engineering

A refrigerator with R-410a as the working fluid has a minimum temperature of −10°C and a...

A refrigerator with R-410a as the working fluid has a minimum temperature of −10°C and a maximum pressure of 1 MPa. Assuming an ideal refrigeration cycle, find the specific heat transfer FROM the cold space, the specific heat transfer TO the hot space, and the coefficient of performance. Will this refrigeration cycle work in an ordinary kitchen?

Solutions

Expert Solution

samet mamat answered 2 years ago
Next > < Previous

Related Solutions

A refrigerator using R-12 as the working fluid keeps the refrigerated space at ?16? in an...
A refrigerator using R-12 as the working fluid keeps the refrigerated space at ?16? in an environment at 27?. You are asked to upgrade this refrigerator by replacing R-12 with the ozone-friendly R-134a. What changes in the pressure levels would you suggest in the new system? How do you think the COP of the new system will compare to the COP of the old system?
A refrigerator using R-12 as the working fluid keeps the refrigerated space at ?16? in an...
A refrigerator using R-12 as the working fluid keeps the refrigerated space at ?16? in an environment at 27?. You are asked to upgrade this refrigerator by replacing R-12 with the ozone-friendly R-134a. What changes in the pressure levels would you suggest in the new system? How do you think the COP of the new system will compare to the COP of the old system?
A refrigerator with a cooling capacity of 5 ton uses ammonia as the working fluid. The...
A refrigerator with a cooling capacity of 5 ton uses ammonia as the working fluid. The condenser and evaporator maintain a pressure of 1500 kPa and 200 kPa respectively. The compressor has an isentropic efficiency of 80%. If the vapor leaving the evaporator is superheated by 5°C and the liquid leaving the condenser is supercooled by 5°C, determine: a) The power input to the compressor b) The mass flow rate of ammonia c) The COP of the refrigerator
A commercial refrigerator with refrigerant 134a as the working fluid is used to keep the refrigerated...
A commercial refrigerator with refrigerant 134a as the working fluid is used to keep the refrigerated space at TL = -35°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure and 41.3°C. If the compressor consumes 3.3 kW of power, determine (a) the mass flow rate of the refrigerant, (b)...
A refrigerator is running with tetrafluoroethane (R1-34a) as the fluid and working based on the following...
A refrigerator is running with tetrafluoroethane (R1-34a) as the fluid and working based on the following cycle. Saturated vapor at -12oC is entering the compressor and leaving it at 40oC. The superheated vapor after the compressor then condensed at constant pressure to saturated liquid, which ethers the “Joule-Thompson” throttling valve and back to the initial pressure. Assume your system is operating ideally, with a cooling load of 0.2 kW (200 J/s). (a) Draw the cycle on the P-H diagram and...
In a household refrigerator with evaporator temperature -10 ° C and condenser pressure 1000 kPa R134a...
In a household refrigerator with evaporator temperature -10 ° C and condenser pressure 1000 kPa R134a is used as refrigerant. Saturated steam at the compressor inlet The refrigerant that is in the state is in the state of saturated liquid at the outlet of the condenser. Entropy at the compressor outlet is 0.985 kJ / kgK. According to this, a) Cycle T-s and P-h diagrams, showing saturation curves on the diagram Draw. b) Calculate the isentropic efficiency of the compressor....
a refrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration...
a refrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration cycle.the evaporator is maintained at -100C and the refrigirant is a dry saturated vapour as it leaves the evaporator. the compressor has an efficiency of 80%.the conditions at the outlet of the condensor are 300C and 9 bar. 1-if the mass flow rate of the refrigerant is 0,08kg/s workout the rate of heat removal from the refrigerant space.the power input to the cpmpressor and...
A Carnot-cycle refrigerator rejects heat at the pressure of 1000 kPa during which the working fluid...
A Carnot-cycle refrigerator rejects heat at the pressure of 1000 kPa during which the working fluid R -134a changes from saturated vapor to saturated liquid. The heat is added to the cycle at the pressure of 320 kPa. Show the cycle in a T-s diagram and determine the coefficient of performance of the cycle using a) the first law of thermodynamics b) the Carnot cycle efficiency equation and c) the T-s diagram.
A refrigerator has an internal temperature of 17.52oC in a room at temperature 30.63oC. It consumes...
A refrigerator has an internal temperature of 17.52oC in a room at temperature 30.63oC. It consumes an average of 305.26 W electrical power while continuously removing 405.35 W thermal (heat) from the interior to keep its insides cold. (a) What is it's ideality factor? The ideality factor is the ratio of the actual coefficient of performance of the refigerator to the maximum phyically possible. (b) If it was replaced with an idealized perfect refrigerator operating between those temperatures and still...
An ideal refrigeration cycle utilizes R-134a as a working fluid. If the fluid enters the compressor...
An ideal refrigeration cycle utilizes R-134a as a working fluid. If the fluid enters the compressor as saturated vapor at 6 C and enters a throttling valve as a saturated liquid at 1.2MPa. Assuming the mass flow rate of fluid is 1 kg/sec. 1. The heat received by the fluid (kJ) is 2. The heat received by the surroundings (kJ) is 3. The power input to the compressor (kJ) is 4. The coefficient of performance is
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT