rates on an ideal vapor compression refrigeration cycle. A refrigeration unit is chosen with refrigerant 134a with a conde
In a meat processing plant, it is required to cool 1500 kg of beef whose specific heat
average is 3.14 kJ/kg-°C to lower its temperature from 39 °C to 2 °C in 14 hours. It is required to estimate the
energy requirements necessary for meat cooling capacity, assuming that the cooling system
Refrigeration operates on an ideal vapor compression refrigeration cycle. A refrigeration unit is chosen
with refrigerant 134a with a condenser pressure of 1.4 MPa and an evaporator pressure of 240 kPa.
Assume that the refrigerant enters the compressor as a saturated vapor and leaves the condenser as a saturated liquid.
Calculate:
a) The COPR or CDFR,
b) The mass flow of the refrigerant
c) The energy dissipated into the atmosphere
d) The cost of annual electrical energy, if the plant will operate with a load factor (FC) of 85% (100%-FC =
8760 h/year). Consider the unit cost of electrical energy of $2.6 per kWh and the efficiency of the system
90% motor-compressor.
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