| 摘要 |
The invention refers to a district heating arrangement and a method for operating a district heating arrangement. The arrangement includes a heat-producing unit (1), which provides a hot primary fluid, local units (2), which each includes a heat-exchanger device (13, 14), and a conduit network, which includes a feeding conduit (3, 3') for transporting the primary fluid from the heat-producing unit to each local unit. Each local unit receives the primary fluid through the heat-exchanger device for transfer of heat to a secondary fluid flowing through the heat-exchanger device. Each local unit includes first means (27), which provides at least a first parameter related to the efficiency of the heat transfer. Each local unit includes a communication device (50), arranged to communicate an instantaneous value of the first parameter to a communication device (51, 64) of the arrangement. Second means (61 - 63) co-operate with this communication device (51, 64) and determine the local unit which has the largest need of maintenance depending on the instantaneous value. |
