A specific refrigeration system, with ammonia as the working substance, has 1 compressor and 2 evaporators. One evaporat

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A specific refrigeration system, with ammonia as the workingsubstance, has 1 compressor and 2 evaporators. One evaporator has aload of 32 kW at 12°C and the other has a load of 65 kW at -4°C.Back pressure valve reduces the pressure in the 12°C evaporator tothat of the -4°C evaporator. The condensing temperature is 38°Cwith enthalpy of 1488 kJ/kg after compression.
hf at 12°C = 255.918 kJ/kg
hg at 12°C = 1473.34 kJ/kg
hf at 38°C = 380.754 kJ/kg
hg at 38°C = 1489.76 kJ/kg
hf at -4°C = 181.559 kJ/kg
hg at -4°C = 1457.29 kJ/kg
Determine the mass flow rate before entering the hightemperature evaporator.
Group of answer choices
0.04930 kg/s
0.03930 kg/s
0.05930 kg/s
0.02930 kg/s