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CHAPTER 3: HEAT SIMULATION MODEL 56 3.2 System Simulation In the previous section the reasons for choosing a suitable compressor were discussed. This section describes the system simulation of the transcritical heat pump and determines the unknown variables needed to describe a heat pump cycle. After the system has been simulated, the chosen compressor will be implemented. Figure 3.5 shows the system diagram layout and the positioning of the components making up the heat pump system. The CO2 heat pump system consists of the DORI N compressor, pressure relieve valve, gas cooler, internal heat exchanger, expansion valve, air to refrigerant evaporator and liquid receiver. For the characterization of the compressor the internal heat exchanger was not taken into account seeing that the compressor chart was obtained with sub-cooling being added. Figure 3.4: T-s diagram showing certain points for simulation description. 380 I 360 r! .. t:z'l: I- .. I 300 ! 280 F820 A Techno-Economical Analysis of a COl Heat Pump. School of Mechanical Engineering, North-West UniversityPDF Image | CO2 HEAT PUMP Analysis
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