Automation Of Second-net Balance Based On NB-IoT

In the heating system,the hydraulic imbalance of the secondary network has always been a prominent problem.In the secondary network system,the distance between different heat users and the heat source center is different,which results in different residual pressure heads of different heat users.Different residual pressure heads make the flow rate to each heat user inconsistent with the design value,resulting in hydraulic imbalance.In order to solve the problem of hydraulic imbalance,heating enterprises usually adopt manual hydraulic balance.Since the adjustment process is too complicated,manual adjustment is time consuming and laborious and the effect is not good.This topic combines the current emerging Internet of Things,uses NB-IoT communication mode,builds a remote monitoring platform,and remotely adjusts the hydraulic balance of the secondary network.This regulation method is fast,efficient and more accurate,which not only improves the quality of heating,but also saves energy consumption and achieves good economic benefits.The content of this paper can be divided into the following parts.Firstly,the causes of hydraulic imbalance in secondary network system are introduced,the significance of hydraulic balance is analyzed,and the current situation of development and implementation of hydraulic balance at home and abroad is expounded.On this basis,this paper analyzed the feasibility and superiority of using the Internet of Things technology for hydraulic balance.Secondly,the overall technical scheme of the subject is described,and several common methods of hydraulic balance are compared.Finally,the backwater temperature method is used for hydraulic balance.The return water temperature in the pipeline is measured by the water temperature sensor and the secondary network balance controller transmits the temperature to the monitoring cloud platform through NB-IoT.The cloud platform carries on the overall analysis of the return water temperature of all units,and then gives the regulation instructions.The balance controller controls the valve opening according to the cloud platform instruction,and adjusts the return water temperature of all units to be consistent.Thus the hydraulic balance can be achieved.In order to make up for the shortage of backwater temperature method,this topic designs an indoor temperature collector to monitor the room temperature of typical users.After the hydraulic balance of the secondary network is completed,the overall quantity and quality regulation is carried out in the heat exchanger station to save energy consumption.In this paper,the realization principle of indoor temperature collector,secondary network balance controller and heat exchange station regulating equipment is introduced in detail,and the corresponding hardware and software design is also carried out.Finally,the specific experimental results of this subject are given.After the secondary network balance adjustment,the experimental area reduces 36% of the power and 17% of the heat energy,and achieves ideal results.