Research On The Regulation Strategy Of One-way Ring-shaped Heat-supply Network

The main study of this thesis is about the design method and operation adjustment of one-way ring-shaped network,in which the main ring line and heat station connect by water.The research contains three parts: the form of one-way ring-shaped network and the analysis of its hydraulic and thermal working condition,the operation adjustment of one-way ring-shaped network,the study of the project instance operation adjustment and also analysis and calculation on power consumption of system.Find the design method of the one-way ring-shaped heat-supply network,including hydraulic and thermodynamic calculation of one-way ring-shaped network,hydraulic conditions analysis and design of heat station.Provide the temperature design and heat load distribution principle of heat sources and heat users in the system;Deduce the operation adjustment rule of Single heat resource or double heat sources in one-way ring-shaped network.Find out the operation adjustment rule suitable for the one-way ring-shaped network,including single heat source and double heat sources system.The main differences in regulation between one-way ring-shaped network system and double pipe system is that the ring-shaped main line and heat station in one-way ringshaped network system can be regulated separately,but the ring-shaped main line and the first side of heat station in one-way ring-shaped network can perform the same regulation rule,the operation of the double heat sources ring-shaped network can be divided into two cases: small load condition and normal working conditions.By giving the example of the reform design of the existing double pipe system of The Future City to One-way ring-shaped network system,to expound the design method of ring-shaped network system and the problem,which we need to pay attention.Through the study of project instance,studying the effect of different arrange of ring-shaped network in different regulating mode on the system power consumption during heating period.And compare the power consumption between ring-shaped network and double pipe system,the calculation results of power consumption for ring-shaped network system is less than two pipe system,and gets the optimal system.Put forward pump conveying power calculation formula of oneway ring-shaped system,compare the water pump power of traditional double tube system and one-way ring-shaped network system water based on the traditional double pipe system;Study the effects of load distribution on the system power transmission pump.