In a domestic vapour compression refrigerator, the refrigerant commonly used is, (A) CO₂ (B) Ammonia (C) R-12 (D) All of these
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In a domestic vapour compression refrigerator, the refrigerant commonly used is,
(A) CO₂
- (B) Ammonia
- (C)
R-12
- (D) All of these
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- In a household refrigerator, the condenser is vertically mounted at the outer backof the unit, the freezer (evaporator) on the topmost compartment, and thevegetable compartment at the very bottom. Explain why?A standard vapor compression system produces 20 tons of refrigeration using R-12 as arefrigerant while operating between a condenser temperature of 41.6 oC and anevaporator temperature of –25 oC. Determine (a) the refrigerating effect in kJ/kg, (b) thecirculating rate in kg/s, (c) the power supplied, (d) the COP, (e) the heat rejected in kW,and (f) the volume flow rate in L/s.What is the highest COP that a refrigerator operating between temperature levels TL and TH can have?
- A standard vapor compression system produces 20 tons of refrigeration using R-12 as refrigerant while operating between a condenser temperature of 41.6 C and an evaporator temperature of -25C. Determine a). the refrigerating effect in kJ/kg b). the power supplied c). the COP d). the heat rejected in kWA two-evaporator, multiple EV,and multiple compression refrigeration system uses refrigerant-134a as the working fluid. The system operates evaporator 1 at 0°C, evaporator 2 at -26.4°C, and the condenser at 800kPa. The refrigerant is circulated through the compressor at a rate of 0.1kg/s and the low temperature evaporator serves a cooling load of 8 kW.Determine the cooling rate of the high-temperature evaporator, the power required by the compressor, and the COP of the system. The refrigerant is saturated liquid at the exit of the condenser and saturated vapor at the exit of each evaporator, and the compressor is isentropic.A two-evaporator, multiple EV,and single compression refrigeration system uses refrigerant-134a as the working fluid. The system operates evaporator 1 at 0°C, evaporator 2 at -26.4°C, and the condenser at 800kPa. The refrigerant is circulated through the compressor at a rate of 0.1kg/s and the low temperature evaporator serves a cooling load of 8 kW.Determine the cooling rate of the high-temperature evaporator, the power required by the compressor, and the COP of the system. The refrigerant is saturated liquid at the exit of the condenser and saturated vapor at the exit of each evaporator, and the compressor is isentropic.