一、单双混合采暖立管方案的提出众所周知,在多层建筑热水采暖系统中,单管系统节省钢材,节约投资,施工方便,是其他采暖立管布置形式所不能比拟的。也是该系统得以大力推广的主要原因。对于目前钢材短缺、经济不富裕的国情,确有其现实意义。由于单管串联有缺欠,譬如处理不当将导致上层热下层冷,现在建成的五层住宅楼就有这种情况,顶层和底层室温相差4.5℃;由于单管串联各层连接散热器的水平支管不 First, the proposed single-double hybrid heating riser program As we all know, in the multi-storey building hot water heating system, the single-tube system saves steel, saves investment, and is convenient for construction. It is unmatched by other heating riser layouts. It is also the main reason why the system can be vigorously promoted. For the current situation of the shortage of steel and the economy is not rich, it does have its practical significance. As there is a defect in the single pipe series, improper handling may cause the upper heat layer to be cold. This is the case for the five-storey residential building now built. The difference between the top and bottom room temperature is 4.5°C; the horizontal pipe connecting the radiators in a single pipe in series Do not