Study On Optimization And Management In Daqing Oilfield Central Heating System

With enlargement of the urban construction scale and the increasing constantly of heat users, our country's urban heating organizations pay attention to optimization planning and transformation of the heating of pipe network more and more already. Carrying on the research of optimization of the central heating pipe network in the city, not only there are important meanings to economize the investment, reduce heating energy consumption,and improve enterprise's benefit etc, but also it is the important tache to realize safe and reliable heating. So, optimizing and planning the heat network has important social benefits and it is a subject to be solved urgently by urban heating trade. Because the optimization of the heating pipe network has the important position in the heating project, the domestic and the international scholars have carried on extensive and deep research.They have proposed many kinds of optimization methods, but there is certain limitation in practical application in these methods.This paper studies the specific status of Daqing central heating system, aiming at improving and optimizing Daqing central heating system and put forward concrete optimization strategies. The main contents include the following:(1)This paper investigated the status of Daqing central heating system, and transformed the original control system, and made a reasonable and effective automation programme.(2) It also established the programme with a multi-heat ring network running. Through accessibility analysis, simulated and computed the hydraulic conditions of the multi-heat and ring network, and it provides a theoretical basis for the next optimization of the pipe network's hydraulic scheduling and further improving the stability of the network.(3)In the study to heating system operating strategy adjustment, introduced the fuzzy control strategy.Every thermal consumer implements adjusting by themselves, so they can't be controlled entirely.When there is not enough heat, some thermal consumer may grab food.It will lead to the thermal consumer at the end of heating network badly off heat.Fuzzy logic control used to limit opening degree of the eleetronic valve in this paper. So methermal consumer, which is short of heat, only can obtain limited heat.This method can avoid other thermal consumers from infection.(4)This paper uses neural network theory to research the various sources of heat dynamic load forecast, and developing the PM-RBF algorithm by using neural network which adapts to the predietion of the heat burden.By simulating experiment, the algorithm has favorable precision and speed of predietion, solving the prediction problem of the heating system and providing the basis for optimization and dispatehing of the system.(5) In the research of heat flow regulation, in order to realize the macro control of the District Heating Network, Genetic Algorithm is used, which has the function of optimization in the overall solution area. On the basis of Daqing Heating Network, which is an indirect connection network, the control strategy based on Genetic Algorithm is presented and discussed thoroughly in the second part of this paper. Using this method, the flowrate in the primary heating network is distributed evenly according to the heating load of the secondary heating network, which is the so called even distribution method. According to the simulation result, this control strategy is effective. It can make the average temperature of the supplying water and return water in every substation tends to be equal, which guarantees well-proportioned flow distribution in the primary heating network. Meanwhile, a comfortable living environment can be created in people's daily life.(6)Heat supply engineering should serve the soeial construction in an effective way and for this purpose, aproper evaluation, analysis and comparison must be carried out upon the various technical plans, measures and the economic benefit of the designed engineering, that is to say, it must stress the economic benefit and calculate the account of economy. The technical economy an alysis is an indispensable and important work part in the large-scale heat supply engineering projects and for any one large and huge engineering project, it should be fully and scientifically based upon either the technology or the economy. It also makes use of the energy-saving theory to go into the four links of the energy-saving technologies in aspects of heat resources, heat network, heat supply station and the heat-supply users in the heat supply engineering project as well as the heat supply operation, management and adjustment and also put forward many kinds of energy-saving measures and the corresponding economic analyses thereof.(7) Finally, with the needs of future development, Daqing central heating system was optimized planning. In the optimize design of heat source, introduced FAHP, and achieved good results. The result proves that the model which has been put forward can reach the demand for using and the result is satisfactory; From the point of view energy-efficient management, heat user management, household metering management and employee training management, the paper puts forward operating management strategies of Daqing central hearing system, which can give a guide for improving efficiency and effectiveness of Daqing oilfield.