a 0 1 m H 0 6 m T E l E 21 8 2014 FLEXWELL district heating cable FHK Subject to technical changes 5 210 Heat losses FLEXWELL district heating cable Heat losses q W m for one UNO pipe FHK type U value Average operating temperature TB C W mK 40 50 60 70 80 90 100 110 120 130 30 91 0 1983 5 95 7 93 9 92 11 90 13 88 15 86 17 85 19 83 21 81 23 80 39 116 0 1998 5 99 7 99 9 99 11 99 13 99 15 98 17 98 19 98 21 98 23 98 60 148 0 2384 7 15 9 54 11 92 14 30 16 69 19 07 21 46 23 84 26 22 28 61 75 171 0 2748 8 24 10 99 13 74 16 49 19 24 21 98 24 73 27 48 30 23 32 98 98 171 0 4177 12 53 16 71 20 89 25 06 29 24 33 42 37 59 41 77 45 95 50 12 98 220 0 2643 7 93 10 57 13 22 15 86 18 50 21 14 23 79 26 43 29 07 31 72 127 220 0 4043 12 13 16 17 20 22 24 26 28 30 32 34 36 39 40 43 44 47 48 52 147 220 0 5587 16 76 22 35 27 94 33 52 39 11 44 70 50 28 55 87 61 46 67 04 200 310 0 5585 16 76 22 34 27 93 33 51 39 10 44 68 50 27 55 85 61 44 67 02 Type of installation FHK UNO Pipe distance Coverage height Ground temperature Soil conductivity Conductivity of PUR foam 2 pipe laid in the ground a 0 10 m H 0 60 m T E 10 C l E 1 2 W mK lPU 0 032 W mK Heat loss during operation q U TB TE W m U Heat transfer coefficient W mK T B Average operating temperature C T E Average ground temperature C

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