Research Article
Analysis and Research on Energy-Saving Reconstruction of Building Heating System
Table 3
Calculation of specific friction under different temperature difference.
| | Heat load (kW) | Supply water temperature (°C) | Return water temperature (°C) | Temperature difference between supply and return water (°C) | Flow (m³/h) | Pipe diameter (mm) | Specific frictional resistance (Pa/m) |
| | 648.55 | 65 | 60 | 5 | 111.5 | 150 | 218.81 [18] | | 58 | 7 | 79.5 | 110.3 [18] | | 55 | 10 | 55.7 | 55.08 [18] |
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