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在热水采暖系统的管道计算中如不考虑管道冷却的影响,则自然循环水头H的计算就很简单: H=h(Y_0-Y_2)kg/m~2式中 h为散热器高于锅炉中心的垂直距离,m;Y_2和Y_0为锅炉出水和入水的容重,kg/m~3。但实际上管道也是要散热的,热水温度和容重都要变化,因而循环水头也要变化。现以苏联基兴著《暖气工程》中的阐述来分析其中存在的问题。“将因水冷却而产生的补充水头
In the calculation of the pipeline of hot water heating system, if the influence of pipeline cooling is not considered, the calculation of the natural circulation head H is very simple: H=h(Y_0-Y_2) kg/m~2 where h is the radiator higher than the boiler The vertical distance of the center, m; Y_2 and Y_0, is the bulk density of the boiler water and water, kg/m~3. However, in practice, the pipeline must also dissipate heat. The temperature and the bulk density of the hot water must be changed. Therefore, the head of the circulating water must also be changed. The problems existing in the Soviet Union’s “Heat Engineering” are analyzed. "Supplemental water head due to water cooling