Balanced Control Of Electric Control Valve Technical Research Of Indirect Connection Heating Network Systems

Energy saving in heating is one of the most potential and the most effective way in ourcountry building energy conservation, in order to realize high efficiency, stability and energysaving heating network system operation, meet the thermal heating demand of users, theselection of strategies and methods of adjusting and controlling the network system willdirectly impact to the overall energy saving effects of the system. Therefore, this article putsforward to research the adjustment and control of heating pipe network system to provide aspecific way to play a certain help and reference for the heating pipe network system inenergy saving operation and control, as well as to satisfy the user (the heat exchange station)actual heating demand.This article treats the indirect connection heating pipe network system as the object andmakes the research of the adjustment and control of pipeline systems, putting forward thatthe operation adjustment strategy of pipeline system is divided into two stages: the firststage, the secondary pipe network of the pipeline network system according to the change ofoutdoor temperature actively adjust the quality regulation, and the first-level pipelinenetwork make the quantity adjustment; the second stage, the end users of the secondarypipe network adjust the flow themselves, making the heat load and flow changes of thesecondary pipe network system, so the first-level pipeline network must make the quantityadjustment passively to adapt to the load change in the secondary network.In the process of pipe network system running regulation, the overall balance of pipenetwork system must be taken into account at the same time. For the balance control of thesecondary pipe network system, this paper installs the balance valve in the user’s terminaland combining the differential control of the most unfavorable loop to realize it. For thebalance control of first pipe network system, this paper uses the method of electric valveunified control, and combines the software of MATLAB and the regulation model during theadjustment of pipe network system to establish the control management platform ofMATLAB to achieve electric control valve action at the same time of the heat exchangestation in the regulation of rapid and accurate, and is not affected on each other, to meet the actual heating demand of each heat exchanger station, and to ensure pipe network hydraulicbalance.About the unified control of the electric control valve, this paper presents a relationalexpression of control valve on both ends of the flow rate, pressure drop and the relativeopening degree, according to the requirements of the pipe network series parallel relation andhydraulic balance, to calculate each valve’s relative opening degree in the practical work,realizing the unified control of electric control valve, meeting the heat exchange station heatload change at the same time, ensuring the primary pipe network hydraulic balance of thesystem.