The Control Strategy On Supply Water Temperature Building Regulation System

As the energy supply in our country is in a severe situation and consumption of heating energy has cost a large proportion of energy consumption in total, saving building energy and reducing consumption is imperative. Supply water temperature building regulation is an effective way of energy conservation, which can fully reflect the needs of users at the inlet of the thermal heat and provide multi-parameter heat load to adapt to changing requirements. Thus, the study of thermal control methods at the heat inlet has become more and more important.Firstly, this thesis gives an essentia l theoretic analysis of bypass mixing water system with mixing pump, which includes how to determine the ratio of mixing mater under different regulation modes, the methods for analyzing resistance characteristics of pipe network in multi-user systems; and the characteristics of the hydraulic conditions with automatic adjustment devices in multi-user mixing water system. On this basis, this thesis discusses the flow's variable ranges of indoor radiators.Secondly, this thesis discusses the basic adjustment methods and selection of control parameters of the heating system, analyzes the characteristics of mixing water system with different control parameters and the change about water flow, mix water ratio under different adjustment modes. For radiator heating users with or without self-regulation, this thesis proposes the best regulation scheme and supporting control strategy. For floor heating users, this thesis proposes adaptive control scheme based on analyses of its particularity.Then, this thesis discusses the structural features, flow characteristics and application of backwater temperature regulating valve, and presents a reasonable regulation scheme for the application mixing water system with backwater temperature regulating valve.Finally, this thesis discusses the application characteristics, determining outlet temperature and regulating methods of mixing water system with thermos mixing valve. The study gives an experimental study of the dynamic characteristics of the thermos mixing valve, and further determines the applicability of this system.