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Appendix A: System Configuration A.1 R410A A/C & H/P System A.1.1 R410A system instrumentation Refrigerant temperatures were measured with Omega inline grounded type ‘T’ thermocouples. Pressure measurements were made with electronic pressure transducers. Refrigerant mass flow rate and density were measured at the condenser outlet with a coriolis mass flow meter. Inline sight glasses were installed upstream of the expansion valve inlet and at the evaporator exit. Instrument locations are shown in Figure A.1. Sp B Hu H TC Indoor Chamber RH Dpea Dpen TGICTGN 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 mr Teri,Peri Sc Tero Pero Refrigerant Tgo Glycol mg CH Tgi Sc TG F Dpca CTcri OC Tcro, Pcro TG RH TG Outdoor Chamber Tcn N Dpcn CC H TC B Sp Prcpi Trcpi Pcri Hu W Figure A.1 R410A facility layout showing location of instrumentation 50PDF Image | Comparison of R744 and R410A
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