Development Of The Assistant Adjustment Software Of Duct System In Air-Conditioning System

The adjustment of duct system is the very important item of the whole Air-conditioning system adjustment. It is characteristic of poor condition and take-time. Thus, how to reduce the local workload of adjustment and improve the work efficient has actually become the task toward HVAC trade. And the project has carry through development research by the present computer technology.The software is based on the major theory of air conditioning, and design manual and TAB criterion. At the same time, it has utilized the relative criterion of the design and adjustment. It also has firstly applies the air-system net concept to conjunction duct system with computer technology. Additionally, it has utilized the harvest of the diffluent and confluence cross experiment made by Beijing University of Technology, which has enhance the application of the software and be of innovation. Besides, it can identify the duct line and facility in CAD drawings.The main function is the calculation degree of all kinds of the valves (cross valves, blades valves, draught valves, etc.) fitted in the air system in the condition of the layout and airflow of the air system. And the calculation degree can be exported in the report forms, which can be treated as the fixing degree of valves. Currently, the degrees of valves only need fine-tuning in the sites in order that the flux in the duct can be regulated to the design range. So the routine dynamic adjustment process, which needs turns time and time will come into a static process, which only need fine turning. The effect of valves to duct system is more take into account than in other design software. The thesis has also introduces the process of how to get the final degree result. And it also provide other utilities, such as checking the invalid data, inquiring about friction coefficient, conversion between units, inquiring about local resistance coefficient and so on.Finally, the software also has been applied to the adjustment of duct system lab in Beijing university of Technology. The experiment data has indicated the effect of the software is much satisfied. Certainly, the software should made modified and improved continually in the site adjustment project in order to accomplish the aim of lessen workload and heighten the efficient.