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Inlet Figure A.8 R744 outdoor six pass microchannel heat exchanger slab. Table A.2 Comparison of outdoor coil specifications for the three tested systems. Face area (m2) Core volume (m3) Core thickness (cm) Air side area (m2) Ref. side area (m2) Fin pitch (fins / in.) 0.043 R410A –A/C only system R410A – A/C & H/P system Outlet Outdoor Coil Specs. Finned length: 0.626 m Finned height: 0.850 m # Tubes / slab: 80 Six Passes / slab #Tubes / pass : 16/15/14/14/11/10 Fin depth: 16.5 mm Fin thickness: 0.10 mm Louver angle: 23° Fin height: 8.9 mm Louver height: 7.5 mm Louver pitch: 1.0 mm Louver entry length: 1.7 mm Louver redirection length: 1.7 mm # of louvers: 2 x 6 R744 (3 slabs combined) 1.43 1.60 1.16 0.026 0.026 1.85 1.65 3.70 54.1 50.4 66.9 1.5 4.1 3.38 24 23 20 A.2.4 Compressor and Compressor Motor A 3 kW Dorin CO2 compressor is used with this system. The compressor is located outside of the environmental chambers, as shown in Figure A.4. Dorin model # : CD4.0275 Dorin serial # : 99061057D Displacement: 2.7 m3/h at 1450 rpm Oil: Mobil EAL POE-100-KG 1.8 Power source: 380V, three phase, 50Hz 56PDF Image | Comparison of R744 and R410A
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