| 摘要 |
District-heating pipe system, consisting of supply and return lines (twin or multiple conduit system possible) which are separate from one another on the pressure side. Therefore separate devices for maintaining the pressure and for absorbing the thermal expansion of the district-heating water are necessary in the supply and return system. The static pressures in the supply and return are different and lie far apart. Very large pressure and temperature differences between supply and return. Extremely high heat-transfer capacity, low manufacturing costs. With regard to the operating behaviour and the laying costs, similar to and thus comparable with a gas supply.
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