I. Accurate Flow Measurement and Reasonable Energy Distribution

The operation of a heating system depends on the circulating flow of hot water in the pipeline network, and accurately grasping the flow information of hot water is the basis for the rational distribution of energy. Electromagnetic flowmeters can accurately measure the flow rate of hot water in heating pipelines. Whether in the high-temperature and large-flow hot water transportation section of the primary network or in the fine flow distribution stage of the secondary network for various communities and buildings, they can provide high-precision flow data. Its working principle based on Faraday's law of electromagnetic induction ensures an accurate perception of the flow rate of conductive liquids (hot water), with a measurement accuracy of up to ± 0.5% or even higher. This enables heating enterprises to allocate the heat output of the heat source scientifically according to the actual demand, avoiding excessive or insufficient energy supply. For example, at the hot water output end of the primary network, by accurately measuring the flow rate with an electromagnetic flowmeter and combining it with temperature data, the transported heat can be accurately calculated. Then, according to the heat load requirements of each area, the operating frequency of the water pump can be adjusted reasonably to accurately distribute the hot water to each secondary network, achieving efficient energy utilization, reducing energy waste, lowering heating costs, bringing significant economic benefits to enterprises, and also making a positive contribution to energy conservation and emission reduction.

Heating pipeline networks are usually complex network systems. Due to differences in building structures, insulation properties, and user heating demands in various regions, hydraulic imbalance is likely to occur, resulting in overheating in some areas and insufficient heating in others. Electromagnetic flowmeters play a key role here. By installing electromagnetic flowmeters on each branch pipeline and key nodes, the changes in the hot water flow rate in each area can be monitored in real-time. Heating management personnel can adjust the opening of valves in each area precisely based on these flow data and combined with room temperature monitoring feedback, using an automatic control system to achieve hydraulic balance in the heating system. For example, in the heating system of a large community, through the flow monitoring of the electromagnetic flowmeter, it was found that the hot water flow rate in some buildings was too large, resulting in a relatively high room temperature, while the flow rate in some buildings was insufficient, and the room temperature was low. With the data support of the electromagnetic flowmeter, the heating personnel remotely adjusted the opening of the regulating valves at the entrances of each building, so that the hot water flow was reasonably distributed among the buildings, successfully solving the hydraulic imbalance problem, ensuring the stability and uniformity of the heating in the entire community, and improving the satisfaction of residents.

Heating pipeline networks operate under high-temperature and high-pressure environments for a long time and may experience pipeline leaks, blockages, and other faults. Electromagnetic flowmeters can not only provide flow data during normal operation but also provide important clues for fault diagnosis through the change trend of the flow rate when the pipeline network is abnormal. When a pipeline leaks, the pressure at the leak point decreases, which will cause an abnormal fluctuation in the hot water flow rate in this area. The electromagnetic flowmeter can sensitively capture this flow change and transmit the data to the monitoring system to issue an alarm in time, helping maintenance personnel quickly locate the fault point, shortening the repair time, and reducing the impact of heating interruptions on users. At the same time, in the daily maintenance of the heating system, the flow data of the electromagnetic flowmeter can be used to evaluate the operating state of the pipeline network and determine whether there is scaling, blockage, and other situations in the pipeline. For example, if the flow rate of a certain section of the pipeline is consistently lower than the normal level for a long time and other external factors have been excluded through investigation, it is likely that there is scaling or blockage inside the pipeline. Maintenance personnel can carry out targeted cleaning or dredging operations to ensure the unobstructed pipeline network, maintain the normal operation of the heating system, extend the service life of the pipeline network, reduce the operating and maintenance costs of heating enterprises, and ensure the reliability and continuity of heating services.