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The Application of Building Air-conditioning Control System

Author: ChenHaiQuan
Tutor: GuanChangSheng
School: Wuhan University of Technology
Course: Applied Computer Technology
Keywords: Intelligent Buildings Building automation Cleanroom APOGEE PID
CLC: TP273
Type: Master's thesis
Year: 2006
Downloads: 457
Quote: 2
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Abstract


With the rapid development of intelligent building, building automation system is also gradually increasing scientific, economic, reasonable control and management of the equipment within the building. The development of automatic control technology, computer technology, communications technology contributed to the air conditioning automatic control technology has become more sophisticated. The air conditioning system in the increasingly nervous energy in the world today, as the largest portion of the overall energy consumption in buildings, how energy conservation become an important and meaningful. Air conditioning automation system as one of the most important parts of the building automation system, building equipment utilization, optimization of the operational status of equipment and time, extend equipment life, reduce the energy consumption of the device. This article will discuss the control system of the air conditioning system in the clean room. The air conditioning system is a complex thermodynamic system, Disturbance, retaining structure, personnel, equipment, in addition to the effect of weather on system impact. The lag in temperature and humidity control system, the reaction rate increased difficulty. Temperature and humidity as the amount of the two associated temperature increases and the humidity decreases; lower the temperature, humidity increases, interrelated parameters are controlled, the mutual influence. Therefore establish control object such as clean room control system, control of high precision, fast response, but also to save energy. Energy saving in the premise, the establishment of an appropriate control processes, is of great significance to control the clean room environment parameters. Cleanroom air conditioning control system for the study of the contents of the Siemens building automation products - APOGEE peak system platform. Siemens sensor, actuator, controller, complete the Wuhan National Laboratory for Optoelectronics cleanroom air conditioning control system design, hardware installation and software development process. According to the characteristics of the laboratory environment parameters, taken when the contradictions between temperature and humidity control, humidity signal priority, reheat to improve strategies of the temperature. To replace the secondary air with plenty of re-heat, saving energy consumption. In order to ensure the cleanliness of the system, by the differential pressure of the high efficiency filter to control the fan speed, the air volume of the system to achieve the ventilation frequency requirements. Trough tariff regenerative night, during the day and the heat source of the heat storage tank, and cost savings. Through the system repeated testing and tuning of PID parameters control system to control the reaction speed of the system time to adjust charged with parameters to set the scope of the accused regional load large changes. Achieved good control effect. Provide an empirical basis for future engineering practice. Alarm management software system capable of monitoring equipment operating conditions of the system: the trend data collected sensor data from the controller and save it as a historical record, you can always view the historical data; observe the changes of the dynamic data in real time; dynamic graphic displays the current scene in real time data. The software system provides a convenient platform for system management.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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