Question

An ice plant produces 2500 kg of ice at -8°C water in one day. The cycle operates at 250 kPa and 1400 kPa using R22. It used 10°C superheating, assuming that 85% of the heat from subcooling is used for superheating in the internal heat exchanger. The specific heat of water and ice are 4.187 kJ/kg-K and 2.093 kJ/kg-K, and the latent heat of fusion of water is 335 kJ/kg. Given that the water being frozen has an initial temperature of 30°C, determine A. The refrigerating capacity needed in kW B. The required mass flow rate of R-22 in kg/s C. The power of compressor in kW if it has a thermal efficiency of 85% D. The approximate temperature at the compressor outlet, and E. The approximate temperature at the inlet of expansion valve

          An ice plant produces 2500 kg of ice at -8°C water in one day. The cycle operates at 250 kPa and 1400 kPa using R22. It used 10°C superheating, assuming that 85% of the heat from subcooling is used for superheating in the internal heat exchanger. The specific heat of water and ice are 4.187 kJ/kg-K and 2.093 kJ/kg-K, and the latent heat of fusion of water is 335 kJ/kg. Given that the water being frozen has an initial temperature of 30°C, determine
A. The refrigerating capacity needed in kW
B. The required mass flow rate of R-22 in kg/s
C. The power of compressor in kW if it has a thermal efficiency of 85%
D. The approximate temperature at the compressor outlet, and
E. The approximate temperature at the inlet of expansion valve

An ice plant produces 2500 kg of ice at -8°C water in one day. The cycle operates at 250 kPa and 1400 kPa using R22. It used 10°C superheating, assuming that 85% of the heat from subcooling is used for superheating in the internal heat exchanger. The specific heat of water and ice are 4.187 kJ/kg-K and 2.093 kJ/kg-K, and the latent heat of fusion of water is 335 kJ/kg. Given that the water being frozen has an initial temperature of 30°C, determine
A. The refrigerating capacity needed in kW
B. The required mass flow rate of R-22 in kg/s
C. The power of compressor in kW if it has a thermal efficiency of 85%
D. The approximate temperature at the compressor outlet, and
E. The approximate temperature at the inlet of expansion valve

Added by Michael V.

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