8 1 2015 INT CASAFLEX district heating pipe CFL Subject to technical changes 4 210 Heat loss CASAFLEX UNO Heat loss q W m for one UNO pipe CASAFLEX U value Average operating temperature TB C UNO W mK 40 50 60 70 80 90 100 110 120 130 22 91 0 113 3 4 4 5 5 7 6 8 7 9 9 0 10 2 11 3 12 4 13 5 30 111 0 123 3 7 4 9 6 1 7 3 8 5 9 8 11 0 12 2 13 4 14 6 39 126 0 137 4 1 5 5 6 8 8 2 9 6 10 9 12 3 13 6 15 9 16 4 48 126 0 170 5 1 6 8 8 5 10 2 11 8 13 5 15 2 16 9 18 6 20 3 60 142 0 187 5 6 7 4 9 3 11 2 13 0 14 9 16 8 18 6 20 5 22 4 75 162 0 218 6 5 8 7 10 9 13 0 15 2 17 4 19 5 21 7 23 9 26 1 98 162 0 355 10 1 13 4 16 8 20 1 23 5 26 8 30 2 33 5 36 9 40 2 127 202 0 366 11 0 14 7 18 3 22 0 25 6 29 3 33 0 36 6 40 3 44 0 Heat loss during operation q U TB TE W m U Heat transfer coefficient W mK TB Average operating temperature C TE Average ground temperature C VL Flow RL Return Pipe distance a 0 10 m Coverage height H 0 60 m Ground temperature TE 10 C Soil conductivity lE 1 2 W mK Conductivity of PIR foam lPIR 0 0250 W mK at average temperature of 50 C Conductivity of PUR foam lPIR 0 0234 W mK at average temperature of 50 C Conductivity of PE casing lPE 0 43 W mK CASAFLEX DUO Heat loss q W m for one DUO pipe CASAFLEX U value Average operating temperature TB C DUO W mK 40 50 60 70 80 90 100 110 120 130 22 22 111 0 156 4 7 6 2 7 8 9 4 10 9 12 5 14 0 15 6 17 2 18 7 30 30 126 0 181 5 4 7 2 9 0 10 9 12 7 14 5 16 3 18 1 19 9 21 7 39 39 142 0 224 6 7 8 9 11 2 13 4 15 7 17 9 20 2 22 4 24 6 26 9 48 48 162 0 251 7 5 10 0 12 5 15 0 17 6 20 1 22 6 25 1 27 6 30 1 60 60 182 0 271 8 1 10 8 13 6 16 3 19 0 21 7 24 4 27 1 29 8 32 5 not available in Germany H 0 6m TE lE RL return VL flow H 0 6 m TE lE a 0 1 m

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