9 3 2015 CALPEX district heating pipe CPX Subject to technical changes 20 C 3 0 C 300 10 020 20 05030 40 30 0120 180140 16080 40 0 T 10 00 20 0050 0 16 00 12 00 18 00 14 00 80 0 Q kW 10 000 1000 500 2000 3000 5000 20 000 30 000 100 000 200 000 160 130 8 mm 140 114 6 mm 125 102 2 mm 110 90 0 mm 90 73 6 mm 75 61 4 mm 63 51 4 mm 50 40 8 mm 40 32 6 mm 32 26 2 mm 25 20 4 mm 10 0 50 30 20 10 50 0 30 0 20 0 4000 40 000 70 000 10 00 20 00 30 00 75 15 0 20 30 50 10 0 20 0 30 0 50 0 10 00 20 00 30 00 50 00 15 40 75 15 0 0 5 m s0 4 m s0 3 m s 0 75 m s 1 0 m s 1 5 m s 2 0 m s 3 0 m s 4 0 m s Pressure loss p Pa m M as s flo w ra te m kg h W ater velocity 1 200 Pressure loss chart Heating 6 bar Water temperature 80 C Surface roughness ε 0 007 mm PEXa 1 mmWS 9 81 Pa Q 860m T m Flow rate in kg h Q Power requirement in kW T Temperature difference VL flow RL return in C

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