•  Mollier or Pressure/enthalpy charts are another alternative to obtain a quick and initial performance estimation of refrigeration/heat pump cycles. Your role in a company that provides design and installation services for refrigeration system is to provide preliminary performance estimation for a freezer. You have been given the following design requirements:
• The system design specifications are as follows:
•  - Refrigerant HFC-134a as the working fluid
• - Ideal cycle operation conditions are assumed
•  - Cycle is operated at high temperature line of 30 
•  - Cycle is operated at low temperature line of −10 
• - Mass flow rate of 0.05 kg/s
• 
  
• Your manager asked you to make use of pressure/enthalpy chart provided for HFC-134a refrigerant in the Appendix. A to estimate COP and power required.
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pndix, A 100 20. 150 200 250 300 350 400 450 500 550 600 650 700 200. 10. 8. o.00124- 0.0013 0.0014 0.0016 HFC-134a 20.0018 U.0020 Pressure-Enthalpy I 0.0030 6. 100. 8 8,8.1 Diagram volume - 0.0040 mkg 80. 4. 0.0060 60. 0 0080 0.010 40. 2. 0.015 0.020 20. 1. 0.030 0.8 0.040 10. 8. 0.6 0.060 0.4 6. 10 0.080 -temperature - 0C 0.10 0.2 0.15 0.20 0.1 0.08 0.30 0.40 0.06 1. 0.60 0.8 0.04 0.6 0.80 1.0 0.4 0.02 1.5 2.0 0.01 100 150 200 250 300 350 400 450 500 550 600 650 Enthalpy (kJ/kg) 70 Pressyre (bar) 2. 4. 240 ocz temperature - 220 C oiz i 061 te 091 N OLL t 001 06 6000 -00'L - 06 0: temperature-20C OF 0.75 -- S9'0 os- 0g- Pressure (MPa)