在区域供热系统中,外部热力网供水温度一般高于室内采暖系统的温度。这是降低热力网造价和运行费用的需要,同时也是改善外网水力工况和内部系统调节的需要。因为提高供水温度可使热力网循环水量降低,从而使水压线趋于平缓,在运行中减小压力波动幅度。而对于采暖系统来说,则希望水 In the district heating system, the external heating network water supply temperature is generally higher than the indoor heating system temperature. This is a need to reduce the cost and operating costs of thermal networks, and it is also a need to improve the external network hydraulic conditions and internal system adjustments. Because increasing the temperature of the water supply can reduce the amount of circulating water in the thermodynamic network, so that the water pressure line tends to be gentle, and the pressure fluctuation amplitude is reduced during operation. For the heating system, you want water