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------~~~~~~---- Figure 2.28: Variation of discharge pressure and the effect thereof. 44 Figure 2.29: T-s diagram, including a diagram of a transcritical heat pump system 45 commonly used for water heating. Figure 2.30: Measured heating COP of prototype system with an inlet water 46 temperature of 10°C. Figure 2.31: Comparison of transcritical cycle to subcritical cycle. 47 Figure 2.32: Instant hot water supply heat pump. 48 Figure 2.33: P-h diagram of CO2 heat pump cycle. 49 CHAPTER 3 Figure 3.1: DORIN compressor range. 52 Figure 3.2: DORIN compressor. 53 Figure 3.3: DORIN compressor TCS range main features. 53 Figure 3.4: T-s diagram showing certain points for simulation description. 56 Figure 3.5: CO2 heat pump diagram. 57 Figure 3.6: Cooling capacity against evaporation pressure. 62 Figure 3.7: Mass flow against evaporation pressure. 63 Figure 3.8: Compressor efficiency against evaporation pressure. 64 Figure 3,9: Coefficients a2 against discharge pressure. 66 Figure 3.10: Coefficients a1 against discharge pressure. 67 Figure 3.11: Coefficients aO against discharge pressure. 67 Figure 3.12: Coefficients a5 against discharge pressure. 68 Figure 3.13: Coefficients a4 against discharge pressure. 69 Figure 3.14: Coefficients a3 against discharge pressure. 69 Figure 3.15: Coefficients a2 against discharge pressure. 70 Figure 3.16: Coefficients a1 against discharge pressure. 70 Figure 3.17: Coefficients aO against discharge pressure. 71 Figure 3.18: T-s diagram: T_wi=1 O°C; T_gc=288K; and P_dis=1 OOOOkPa. 78 Figure 3.19: T-s diagram: T_wi=10°C; T.-9c=298K; and P_dis=10000kPa. 78 Figure 3.20: T-s diagram: T_wi=1 O°C; T_gc=308K; and P_dis=1 OOOOkPa. 78 Figure 3.21: T-s diagram: T_wi=20°C; T_gc=288K; and P_dis=10000kPa. 78 Figure 3.22: T-s diagram: T_wi=20nc; T_gc=298K; and P_dis=10000kPa. 78 Figure 3.23: T-s diagram: T_wi=20°C; T_gc=308K; and P_dis=10000kPa. 78 Figure 3.24: T-s diagram: T_wi=30°C; T_gc=308K; and P_dis=9000kPa. 78 Figure 3.25: P-h diagram: T_ev=283K; T.-9c=288 K; and P_dis=1 OOOOkPa. 81 Figure 3.26: P-h diagram: T_ev=283K; T_gc=308K; and P:...,dis=1 OOOOkPa. 82 A Techno-Economical Analysis of a CO2 Heat Pump. School of Mechanical Engineering, North-West University viiiPDF Image | CO2 HEAT PUMP Analysis
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