Room Simulation And Evaluation With HVAC Control System Base On LonWorks

With the rapid development of intelligent building, heating and ventilating air condition (HVAC) control system based on Lonworks is more common,and the performance of temperature controlling is gotten more attendtion.In this paper, we first discuss the model for air condition room's temperature. Then the LonWorks platform that simulates the variation of the room temperature and evaluates the controller is built.The primary work of the paper includes:1. Build database with the factors like the meteorological model and architecture structure. Calculate the immediate cooling load by the method of CLF;2. Build a common room temperature model by double input of flow and temperature of the supply air.Calculate the real-time temperature variation under air condition controller by combining the cool load;3. We research on node which is suitable for the simulation function with LonWorks technology;4. A upper machine software is built. We connect the simulator DDC and HVAC controller by LNS technology.We also realize the calculation, data storage,display and system analysis fuctions through human-computer interfaces.The research ultimately developed an simulation system based on LonWorks,and can calculate the temperature changings of the different rooms in the different control modes combined with the controllers.It provides effective basis for the debug and evaluation of the controller.