9 3 2015 CALPEX district heating pipe CPX Subject to technical changes 1 210 Heat loss Heating 6 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 25 76 0 1142 3 43 4 57 5 71 6 85 7 99 25 91 PLUS 0 0993 2 98 3 97 4 97 5 96 6 95 32 76 0 1442 4 33 5 77 7 21 8 65 10 09 32 91 PLUS 0 1212 3 64 4 85 6 06 7 27 8 48 40 91 0 1510 4 53 6 04 7 55 9 06 10 57 40 111 PLUS 0 1236 3 71 4 94 6 18 7 42 8 65 50 111 0 1551 4 65 6 20 7 76 9 31 10 86 50 126 PLUS 0 1360 4 08 5 44 6 80 8 16 9 52 63 126 0 1767 5 30 7 07 8 84 10 60 12 37 63 142 PLUS 0 1539 4 62 6 16 7 70 9 23 10 77 75 142 0 1908 5 72 7 63 9 54 11 45 13 36 75 162 PLUS 0 1616 4 85 6 46 8 08 9 70 11 31 90 162 0 2057 6 17 8 23 10 29 12 34 14 40 90 182 PLUS 0 1747 5 24 6 99 8 74 10 48 12 23 110 162 0 2957 8 87 11 83 14 79 17 74 20 70 110 182 0 2355 7 07 9 42 11 78 14 13 16 49 110 202 PLUS 0 1992 5 98 7 97 9 96 11 95 13 94 125 182 0 3026 9 08 12 10 15 13 18 16 21 18 125 202 PLUS 0 2771 8 31 11 08 13 86 16 63 19 40 140 202 0 3084 9 25 12 34 15 42 18 50 21 59 160 250 0 3028 9 08 12 11 15 14 18 17 21 20 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 25 25 91 0 1786 5 36 7 14 8 93 10 72 12 50 25 25 111 PLUS 0 1392 4 18 5 57 6 96 8 35 9 74 32 32 111 0 1829 5 49 7 32 9 15 10 97 12 80 32 32 126 PLUS 0 1571 4 71 6 28 7 86 9 43 11 00 40 40 126 0 2108 6 32 8 43 10 54 12 65 14 76 40 40 142 PLUS 0 1741 5 22 6 96 8 71 10 45 12 19 50 50 162 0 1954 5 86 7 82 9 77 11 72 13 68 50 50 182 PLUS 0 1662 4 99 6 65 8 31 9 97 11 63 63 63 182 0 2381 7 14 9 52 11 91 14 29 16 67 63 63 202 PLUS 0 2075 6 23 8 30 10 38 12 45 14 53 CALPEX DUO flow and return in one pipe Type of installation CPX UNO Type of installation CPX DUO Pipe distance Cover above pipe Ground temperature Soil conductivity Conductivity of PUR foam Conductivity of PUR foam Conductivity of PEX pipe Conductivity of PE pipe 2 pipe laid in the ground 1 pipe laid in the ground a 0 10 m H 0 80 m TE 10 C E 1 0 W mK PU 0 0216 W mK PU 0 0260 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 VL Flow RL Return a 0 1 m H 0 8 m TE E TE E RL return VL flow H 0 8 m Note Due to the planned revision of standards the heat losses are not shown as specified within EN 15632

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