A Specific Refrigeration System With Ammonia As The Working Substance Has 1 Compressor And 2 Evaporators One Evaporat 1 (85.65 KiB) Viewed 32 times
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 = 255.918kJ/kg hg at 12°C = 1473.34 kJ/kg hf at 38°C = 380.754 kJ/kg hg at38°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.
A specific refrigeration system, with ammonia as the working substance, has 1 compressor and 2 evaporators. One evaporator has a load 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 to that of the −4∘C evaporator. The condensing temperature is 38∘C with 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 high temperature evaporator.
Determine the mass flow rate before entering the high temperature evaporator. 0.02930 kg/s0.05930 kg/s0.04930 kg/s0.03930 kg/s
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