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热力网采用质调节时,一个重要的问题是如何保证良好的水力工况。水力工况好坏的重要标志,一是循环水量,一是回水温度,二者都不超过规定值。管网越复杂,用户越多,上述要求越难达到,因为需要很高的调节手段和调节水平。控制不好,就会出现流量过大,回水温度过高的“失调”现象,结果使输送介质的电耗无益地加大,管网阻力增加,造成用户
When the thermodynamic network uses quality control, an important issue is how to ensure good hydraulic conditions. The important signs of good or bad hydraulic conditions are the amount of circulating water, and the temperature of the return water, neither of which exceeds the specified value. The more complex the pipe network and the more users, the harder it is to achieve the above requirements, because of the high level of adjustment and adjustment required. If the control is not good, there will be an “offset” phenomenon in which the flow rate is too large and the return water temperature is too high. As a result, the power consumption of the transmission medium increases unfavorably, and the resistance of the pipe network increases, resulting in the user.