Actual needs are also inconsistent compared to the magnitude of the increase

In actual operation, each riser must have hydraulic imbalance, which must be solved by the operator repeatedly adjusting the valve on site. It also caused the horizontal temperature loss of the room. In addition, in the process of zeroing the heat sink, the heat sink area of ​​each room increases, and the maximum can be increased by more than one piece, and the minimum increase is also inconsistent compared with the actual needs. Therefore, it will inevitably cause horizontal temperature loss. The solution to the problem is due to the many causes of vertical imbalance. It is necessary to analyze the specific problem and then grasp the main contradiction, so that the vertical offset can be appropriately reduced or the vertical offset problem can be completely overcome. It is necessary to put a good design in the design to ban the wrong way of using large-size heat sinks. It is necessary to vigorously promote a heat sink or a column type heat sink having a good heat dissipation effect and a small heat dissipation area. This is only due to the cooperation of the design department's efforts, the quality supervision department's check and the construction development department to update the concept, but the most important one is the heating company's own determination and efforts. In the design of the building, the double-pipe upper-return system with serious vertical misalignment and the double-pipe sub-fraction system with poor hydraulic stability are resolutely eliminated. The heat load calculation of the radiator area calculation and the hydraulic condition calculation are all strive to be accurate. We will connect the gateway and technically transform the original system with serious vertical imbalance. The good connection gateway, the unqualified heating system can not be directly connected to the heating system, the double pipe system can be converted to a single pipe downstream system after calculation. For the upper and lower single pipe system which has been corrected for the heat load calculation, the upper pipe and the closed pipe can be adopted in the upper layer and the heat dissipation of the upper radiator can be reduced. For heating systems that cannot be retrofitted at one time, the method of increasing the circulating water volume and reducing the temperature difference between the water supply and return water can be temporarily solved. Although this approach increases operating costs, it is unscientific. However, it is effective to immediately alleviate the loss caused by the vertical offset to the user. Generally, the temperature difference of the return water can be reduced from the design parameters to 10, which can be achieved by the following methods. For the indirect heating system, the circulating water pump with the same head and large flow rate can be replaced in the heat exchange station. For the direct heating system, a small lift large-flow mixed water pump can be added to the water supply main pipe in front of the building heating system, and the return water main pipe is connected to a water pump door to make the water pump pump a part of the hot water, and at the same time Pump a portion of the water back and send it to the heating system. As the water is mixed, the return water temperature of the system is lowered, so that the heat dissipation is reduced. Moreover, since the temperature difference between the supply and return water is reduced, the average temperature difference of the heat sinks of each layer is reduced, and the heat dissipation amount of the bottom layer heat sink is increased. (Finish)

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