8 1 2015 BRG PREMANT district heating pipe PRE Subject to technical changes Heat losses q W m for one pipe PREMANT 26 9 90 33 7 90 42 4 110 48 3 110 60 3 125 76 1 140 88 9 160 114 3 200 139 7 225 168 3 250 219 1 315 273 0 400 323 9 450 355 6 500 406 4 560 457 2 630 508 0 710 610 0 800 711 0 900 813 0 1000 914 0 1100 1016 0 1200 U value Average temperature between VL RL TB C W mK 50 C 60 C 70 C 80 C 90 C 100 C 110 C 120 C 130 C 0 1292 5 2 6 5 7 8 9 0 10 3 11 6 12 9 14 2 15 5 0 1572 6 3 7 9 9 4 11 0 12 6 14 2 15 7 17 3 18 9 0 1607 6 4 8 0 9 6 11 2 12 9 14 5 16 1 17 7 19 3 0 1843 7 4 9 2 11 1 12 9 14 7 16 6 18 4 20 3 22 1 0 2054 8 2 10 3 12 3 14 4 16 4 18 5 20 5 22 6 24 6 0 2410 9 6 12 0 14 5 16 9 19 3 21 7 24 1 26 5 28 9 0 2484 9 9 12 4 14 9 17 4 19 9 22 4 24 8 27 3 29 8 0 2599 10 4 13 0 15 6 18 2 20 8 23 4 26 0 28 6 31 2 0 3002 12 0 15 0 18 0 21 0 24 0 27 0 30 0 33 0 36 0 0 3557 14 2 17 8 21 3 24 9 28 5 32 0 35 6 39 1 42 7 0 3887 15 5 19 4 23 3 27 2 31 1 35 0 38 9 42 8 46 6 0 3779 15 1 18 9 22 7 26 5 30 2 34 0 37 8 41 6 45 3 0 4342 17 4 21 7 26 0 30 4 34 7 39 1 43 4 47 8 52 1 0 4239 17 0 21 2 25 4 29 7 33 9 38 2 42 4 46 6 50 9 0 4514 18 1 22 6 27 1 31 6 36 1 40 6 45 1 49 6 54 2 0 4548 18 2 22 7 27 3 31 8 36 4 40 9 45 5 50 0 54 6 0 4413 17 7 22 1 26 5 30 9 35 3 39 7 44 1 48 5 53 0 0 5380 21 5 26 9 32 3 37 7 43 0 48 4 53 8 59 2 64 6 0 6097 24 4 30 5 36 6 42 7 48 8 54 9 61 0 67 1 73 2 0 6840 27 4 34 2 41 0 47 9 54 7 61 6 68 4 75 2 82 1 0 7550 30 2 37 7 45 3 52 8 60 4 67 9 75 5 83 0 90 6 0 8315 33 3 41 6 49 9 58 2 66 5 74 8 83 1 91 5 99 8 Heat loss Insulation thickness 1 6 210 Type of installation 2 pipe laid in the ground Pipe distance a 0 20 m Ground temperature TE 10 C Coverage height H 0 8 m Soil conductivity lE 1 2 W mK Conductivity of PE jacket lPE 0 4 W mK Conductivity of PUR foam lPUR 0 0260 W mK a H TE lE Heat loss during operation q U TB TE W m U Heat transfer coefficient W mK TB Average temperature between VL RL C TE Average ground temperature C

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