基于冷机建模和负荷预测的冷冻水动态控制研究-控制理论与控制工程专业论文.docx

西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 万方数据 万方数据 Research on Dynamic Control of Chilled Water Based on Chilled Model and Load Forecasting in Air-conditioning System Specialty: Control Theory and Control Engineering Name: Zeng Ye Instructor: Prof. Ren Qingchang ABSTRACT Building energy consumption has accounted for a large proportion of the total social energy consumption, and central air-conditioning energy consumption accounts for about 50% of the total building energy consumption, so the energy-saving of central air-condition system has significance for energy-saving .The energy consumption in water system takes main part of total energy consumption in air-conditioning system. However most of the time the system is running at part load. In order to achieve energy-saving variable flow air-conditioning system emerges. In actual process, due to the constantly change of the running environment and the system load changes, usually system is running in partial load. Accurate prediction of air conditioning load can guide the implementation of the control strategy and improve the operation economy of air conditioning system. The control based on load forecast in air conditioning system is one of the research hotspots and trend at present. This paper analyzed the VAV system chiller water system and the load of the room, changes the pump frequency to achieve variable flow area to meet the needs of air conditioning load on the lower part of the heat, Minimize energy consumption under the premise to meet the load requirements. In this paper variable air volume air-conditioning system of intelligent building and building automation laboratory in Xian University of Architecture Technology is taken as the research object. First, support vector machine method was used to establish a load forecasting model, and the model was validated. A kind of dynamic control of chilled water flow based on load forecasting was proposed .The chilled water pump model was identified and the design o