2. • A piece of an ice having mass 5 kg and maintained at the temperature -50C. Find the change in
entropy of the universe if atmospheric temperature is 200C. Assume (Cp)ice = 2.1 kJ/kg and (Cp)water =
4.2 KJ/kg. Ans: (Δs)uni = 0.5kJ/kg
• Determine the power required for the compressor in kW. (7.9 kW)
• The rate at which heat is extracted in kW from the refrigerated space. (28.3 kW)