9 3 2015 CALPEX district heating pipe CPX Subject to technical changes 1 215 Heat loss Sanitary 10 bar CALPEX UNO Heat losses q W m for one UNO pipe CALPEX UNO U value Average operating temperature TB C W mK 40 50 60 70 80 22 76 0 1131 3 39 4 52 5 66 6 79 7 92 28 76 0 1387 4 16 5 55 6 94 8 32 9 71 32 76 0 1588 4 76 6 35 7 94 9 53 11 12 40 91 0 1666 5 00 6 66 8 33 10 00 11 66 50 111 0 1713 5 14 6 85 8 57 10 28 11 99 63 126 0 1957 5 87 7 83 9 79 11 74 13 70 32 111 HBK 0 1127 3 38 4 51 5 64 6 76 7 89 40 126 HBK 0 1220 3 66 4 88 6 10 7 32 8 54 50 126 HBK 0 1497 4 49 5 99 7 49 8 98 10 48 CALPEX DUO Heat losses q W m for one DUO pipe CALPEX DUO U value Average operating temperature TB C W mK 40 50 60 70 80 28 22 91 0 1956 5 87 7 82 9 78 11 74 13 69 32 22 111 0 1677 5 03 6 71 8 39 10 06 11 74 40 28 126 0 1878 5 63 7 51 9 39 11 27 13 15 50 32 126 0 2476 7 43 9 90 12 38 14 86 17 33 Type of installation CPX UNO Type of installation CPX DUO Cover above pipe Ground temperature Soil conductivity Conductivity of PUR foam Conductivity of PEX pipe Conductivity of PE pipe 1 pipe laid in the ground 1 pipe laid in the ground H 0 80 m TE 10 C E 1 0 W mK PU 0 0234 W mK PEXa 0 38 W mK PE 0 33 W mK 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 H 0 8 m TE E TE E RL return VL flow H 0 8 m

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