(b) The coefficient of performance of the refrigerator.
Added by Michael V.
Step 1
Step 1: The coefficient of performance (COP) of a refrigerator is defined as the ratio of the heat removed from the cold reservoir to the work input required to remove that heat. Show more…
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A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at –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 subcooled by 5°C. If the compressor consumes 3.3 kW of power, determine the refrigeration load.
Madhur L.
A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at –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 subcooled by 5°C. If the compressor consumes 3.3 kW of power, determine the minimum power input to the compressor for the same refrigeration load.
Penny R.
A commercial refrigerator with refrigerant- 134 a as the working fluid is used to keep the refrigerated space at $-35^{\circ} \mathrm{C}$ by rejecting waste heat to cooling water that enters the condenser at $18^{\circ} \mathrm{C}$ at a rate of $0.25 \mathrm{kg} / \mathrm{s}$ and leaves at $26^{\circ} \mathrm{C}$. The refrigerant enters the condenser at $1.2 \mathrm{MPa}$ and $50^{\circ} \mathrm{C}$ and leaves at the same pressure subcooled by $5^{\circ} \mathrm{C}$. If the compressor consumes $3.3 \mathrm{kW}$ of power, determine $(a)$ the mass flow rate of the refrigerant, $(b)$ the refrigeration load, $(c)$ the $C O P,$ and $(d)$ the minimum power input to the compressor for the same refrigeration load.
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