Study On The Establishment And Control Method Of Indoor Thermal Environment Model In Office Building

Office building is a crowded place,the indoor thermal environment will directly affect the efficiency of office staff,so it is of great significance to regulate the indoor thermal environment of office buildings.The main equipment to adjust the indoor thermal environment is the air conditioning system,it is very important to control of air conditioning equipment,in order to ensure the indoor thermal environment is maintained in the comfort of the human body.In this paper,the indoor thermal environment model and the control method are studied,the specific studies are as follows.1.Firstly,heat transfer of indoor thermal environment of the physical process of mathematical description,quantitative analysis of the relationship between indoor thermal environment and outdoor temperature and solar radiation and building structure,and then through the model linearization and Laplace transformation to solve differential equations of mathematical description,description of the indoor thermal environment model.2.Use the office as the research object,determine the parameters of indoor thermal environment model,and set up the office model in the TRNSYS,to verify the accuracy of the model established by mechanism analysis through the meteorological data and the indoor temperature in TRNSYS,the results show that the model has a certain accuracy and practicability.3.Based on the research of the control method of the indoor thermal environment,the PID controller,the PID based on genetic algorithm and the gain adjusted PID are designed and simulated.The simulation results show that the overshoot of PID control is large and more oscillation,in order to improve the control effect,the PID control based on genetic algorithm is designed,the results show that the PID control based on genetic algorithm to make indoor thermal environment rise time of the 100 s,and the overshoot amount is only 5.2%,but the PID parameter of the method cannot be adjusted with the change of the system or the disturbance,so the gain adjusted fuzzy PID is designed,to adjust the PID parameters of the genetic tuning,and the results show that the control algorithm can achieve the goal of setting the indoor thermal environment quickly,and has the advantages of small overshoot and strong anti-interference ability.