Research On Energy Saving Of The Operation Adjustment Mode Of Heating System

With the development of the economy, people’s demands on the indoor comfort have increased steadily. The central heating is widely adopted and has become the main form of heating. In recent years, the operation and management level of central heating is improved step by step, but it still has a large gap compared to developed countries. The overall efficiency of heat network is still on the low side, and the user can not regulate temperature by themselves. These phenomena are also widespread. These factors not only influence the heating quality, also lead to the more serious waste of energy and reduce the economy of heating system.In this paper, the adjustment modes of district heating system are researched. The research status of heating operation adjustment methods of domestic and foreign are summarized; based on the graph theory, the computation models of hydraulic regime of heating network are set up and solved. For the traditional heating system, the quality-flow adjustment method by stages is studied, and the minimum operation flow is determined by the accessibility analysis method; through the calculation of an example, the results show the quality-flow adjustment method by stages is more energy-saving and an ideal adjustment mode. For household metering system, the operation adjustment mode that meet the needs of heating adjustment characteristics is studied, and the primary and secondary net heating adjustment models are built, and the change rule of the supply and return water temperature and the relative flow of the network are obtained; based on the theory of graph theory, when the part of thermostatic valves of radiators are adjusted in the same standpipe, the variation rates of the hydraulic conditions are calculated. The circulating pump control modes of household metering system are analyzed and optimized. The change rules of hydraulic regime in outdoor pipe network are studied. Finally, the software of hydraulic calculation in the VB language is programmed, realizing the accessibility calculation of heating system. By calculating the critical flow of the quality-flow adjustment method by stages under the traditional heating, the operation adjustment stages are judged. For household metering system, whether the user’s available pressure can be met or not is judged; and the pressure diagrams of the supply and return water pipe are drawn. The users will have a macro grasp of the hydraulic condition in the whole heating system.