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CO2 HEAT PUMP Analysis

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CO2 HEAT PUMP Analysis ( co2-heat-pump-analysis )

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LIST OF TABLES CHAPTER 2 PAGE Table 2.1: Characteristics of some refrigerants. 8 Table 2.2: Physical properties of carbon dioxide. 17 Table 2.3: Main difference between transcritical CO2 cycle and subcriticallLH system. 37 CHAPTER 3 Table 3.1: Performance chart for the TCS362-0 compressor. 54 Table 3.2: Results for the cycle simulation. 59 Table 3.3: Coefficients from mass flow equation against the suitable discharge pressure. 66 Table 3.4: Coefficients from compressor efficiency against the suitable discharge 79 pressure. Table 3.5: Results after implementation of equations into EES and the errors compared 73 to known variables. Table 3.6: Average COP, heating capacity and compressor efficiency at different 76 discharge pressures. Table 3.7: Comparison of COP, Q_h and P at different T_ev, T_wi and discharge 80 ,,; _ .• ' A,... _,' , pressures. Table 3.8: Results for a discharge pressure of 10000kPa with varying evaporating 84 temperatures and gas cooler outlet temperatures. CHAPTER 4 Table 4.1: Scenario for the system set up. 89 Table 4.2: Summer and winter summarized results for all three systems. 101 Table 4.3: Total run time for the three systems (summer). 104 Table 4.4: Total run time for the in-line heater and heat pump for all three systems 107 (winter). Table 4.5: Monthly summary of water and energy consumption. 114 Table 4.6: Yearly summary of water and energy consumption. 115 CHAPTER 5 Table 5.1: Megaflex electricity tariffs. 118 A Techno-Economical Analysis of a CO2 Heat Pump. School of Mechanical Engineering, North-West University x

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