Research On Operation And Regulation Program Of Dynamic Distributed Heating System Design

With the increase of new buildings, building energy conservation issues has been widespread concern in the community. Throughout the building energy consumption, the power consumption of district heating systems heat medium distribution has accounted for the majority. The traditional heating systems generally run at part load, in order to adapt to changes in load, it must be consumed through pipeline bypass valve throttling or pressure head off excess capital. This allows the pump to increase energy consumption, serious impact on the economy of the system, and pay huge energy did not bring good regulation characteristics. Distributed power heating system came into being, which uses variable frequency pump instead of the valve system is adjusted to achieve. This new transmission and distribution systems in the form of energy savings through to bring new, but also to improve the stability and adjustability of the system. As the system with conventional heating systems in the form and operation of the system is very different from the policy adjustment, and the lack of a complete run adjustment program design, causing engineers do not have enough theoretical support, leading to the heating system has not been widely distributed Applications. Aiming at this situation, the power distributed to the heating system run regulator to study and give a more complete discussion of operational control processes. Specific completed the following work:Firstly, study on the theory and methods of traditional central heating system operation control.To make a summary analysis of the power distribution system and the traditional system and operation control system in the form of the similarities and differences of strategy. To find out the difference between the two iconic form in the power and pressure distribution pipe network. And distributed power system operation as a research starting point adjustment.Secondly, the establishment of a single power source dendritic distributed district heating pipeline network system model, and its analysis of hydraulic conditions. By controlling the flow of changing a slip, calculate and draw it to other users of the branch and the branch source effect size, explore the inherent characteristics and operation of its transmission and distribution system of regulation law.Third, using the above model has been built, by changing the transmission and distribution network control almost zero pressure to find out their impact on the heating network water pressure distribution. This as the theoretical basis, given fixed, variable zero pressure almost become a specific method of controlling the flow regulating two operating modes, and two ways to make a comparison run regulator, analyze and summarize the advantages and disadvantages of both.Fourth, through the analysis of factors affecting the distributed heating system pump frequency range will be screened to identify the maximum weight factor-branch system backpressure. And gives the method for determining slip under the influence of the system backpressure pump frequency control range of users, to provide a theoretical reference for the development of operational regulation strategies.Finally, the operational control of distributed power heating system proposed general idea and systematic strategy, combined with intelligent joint control module technology, regulating the operation of specific control processes, provide reference for the design and operation staff.