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A.2 R744 RAC1 System Components ....................................................................................... 52 A.2.1 System Overview and Schematics of RAC1...................................................................................................52 A.2.2 RAC1 Indoor Heat Exchanger...........................................................................................................................53 A.2.3 RAC1 Outdoor Heat Exchanger........................................................................................................................55 A.2.4 Compressor and Compressor Motor.................................................................................................................56 A.2.5 Line Sets ................................................................................................................................................................57 A.2.6 Sight Glasses.........................................................................................................................................................57 A.2.7 Suction Accumulator...........................................................................................................................................57 A.2.8 Suction Accumulator Oil-Bleed Valve ............................................................................................................58 A.2.9 Expansion Valve ..................................................................................................................................................58 A.2.10 Charging Conditions.........................................................................................................................................58 Appendix B: Effect of Suction Accumulator Configuration/Indoor Heat Exchanger Orientation on RAC1 R744 Heat Pump Performance.....................................................59 B.1 System configuration ......................................................................................................... 59 B.2 Experimental Results.......................................................................................................... 60 B.3 Conclusion ......................................................................................................................... 63 Appendix C: Indoor Chamber Energy Balance...............................................................64 C.1 Determinationofspecificheatconstants..........................................................................64 C.2 Testing and results.............................................................................................................64 C.3 Error analysis: .................................................................................................................... 65 AppendixD: VaporCompressionCycleControl/Distribution....................................69 D.1 Low pressure receiver in subcritical / transcritical cycle.................................................... 69 D.2 High Pressure Receiver......................................................................................................70 D.2.1 Subcritical Cycle ..................................................................................................................................................70 D.2.2 Transcritical cycle ................................................................................................................................................71 D.3 Flash gas bypass in subcritical / transcritical cycle ........................................................... 71 viPDF Image | Comparison of R744 and R410A
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