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B Hu H TC Sp Indoor Chamber RH Dpea Dpen TGIC TGN CC Ten W B – Blower, C – Compressor , CC – CoolingCoil,CH–GlycolChiller, Dp– Differential Pressure Transducer, F – Fan, H – Heater, Hu – Humidifier, IC – Residential Indoor Coil, mg – Glycol Mass Flow Meter, mr – Refrigerant Mass Flow Meter, Mtr – Motor, N – Nozzle, OC – Residential Outdoor Coil, P – Pressure Transducer, RH – Relative Humidity Probe, S – Separator, SA – Suction Accumulator, Sc – Condensate Scale, Slhx – Suction Line Heat Exchanger, Sp – Speed Controller and Tachometer, T – Thermocouple, TC – Temperature Controller, TG – Thermocouple Grid, W – Watt Transducer, XV – Metering Expansion Valve Indices: a – air, c – condenser, cp – compressor, e – evaporator, g – glycol, i – inlet, n – nozzle, o – outlet, r – refrigerant, sh – suction line heat exchanger mr Tero Teri, Sc Sc Pero Peri Refrigerant Tgo mg Tgi Glycol CH SA C Slhx TG Tcn N CC H TC B Sp F Dpcn OC Pcro, Tcro Pcri, Tcri TG TG Outdoor Chamber RH Dpca Hu A.2.2 RAC1 Indoor Heat Exchanger The RAC1 R744 heat exchangers were provided by Hydro Aluminum, sponsor of the project. The design specifications were aimed at matching the geometry of a R410A A/C only system that was tested prior to the A/C/heat pump system used as the baseline. The primary basis for design and comparison is that of an equal core volume. Due to the prescribed thickness of the available microchannel tube, this invariably led to some variations in other heat exchanger parameters. A side by side comparison of some of these parameters can be seen in Table A.1. It is important to note that the R744 heat exchangers were designed around the A/C only R410A system. The heat pump R410A system specifications were released after the R744 heat exchangers had been manufactured. The R744 heat exchangers incorporate a special header design shown in Figure A.5 that allows for their operation at higher pressures. A schematic of the microchannel tubing can be seen in Figure A.6. The configuration of the heat exchangers in the duct is shown in Figure A.7. W Figure A.4 Schematic of RAC1 CO2 system 53PDF Image | Comparison of R744 and R410A
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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