Dissertation > Excellent graduate degree dissertation topics show

Study on Dynamic Characteristics of Looped Duct in VAV Systems

Author: FengMeng
Tutor: LiNianPing
School: Hunan University
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: Multi-branch looped duct Looped duct Tree-shaped duct Fan performance curve Network performance curve
CLC: TU831.3
Type: Master's thesis
Year: 2007
Downloads: 82
Quote: 0
Read: Download Dissertation

Abstract


With rapid progress of national economy and advance of industrial and cities level,evolution on HVAC system and air-conditioning style have been imperious and essential to building containable development for the sake of energy efficiecy,environment protection and equipment automatization. The appearance and development of VAV (Variable Air Volume) system are dominant in modern building energy saving work, of which research work also regarded and carried out gradually.First, this paper review basic theory and latest research work on VAV system and duct supply air according to the existing literatures, and consequently potential value in use and feasibility in projects are suggested on novel air loop ducts which seldom are employed in research work and actual projeces. Secondly, according to the limited initial theory and the existing conditions, dynamic performance model and measurement method are established, and related structures of the experimental platform provides a platform support for in-depth study.Through experiments and analysis, summed up the basic driving force of looped duct systems, and through the tree-shaped duct to do contrast, analysis the dynamic performance and energy consumption of looped duct.The experimental results indicate that supply air volume of multi-branch looped duct is the largest, of tree-shaped duct is the smallest; The resistance of the network is to the contrary, the resistance of tree-shaped duct is the biggest, of multi-branch looped duct is the smallest, efficiency of multi-branch looped duct is the highest, and have the most energy-saving advantages, and energy-saving effect of tree-shaped duct is the worst. At the same time, because of the automatic adjustment of the connecting duct, hydraulic characteristics of multi-branch looped duct and looped duct can be improved, equivalent to an increase of regulation means. If load in the various district have little difference, compared with tree-shpaed duct, looped duct don’t have obviously advantage in the hydraulic performance, but in the case of load in the various district having large difference, static pressure distribution of looped duct has more advantage because of the automatic adjustment of the connecting duct.

Related Dissertations

  1. Several Problems of Energy Saving Operation in Air Conditioning System of Large Scale Public Buildings,TU831.6
  2. Experimental Study of a Solar Assisted Multi-functional Heat Pump,TU831.4
  3. The Study and Practice of Design Air Condition Setting in South China,TU831.4
  4. Study on Dynamic Energy Consumption Analysis of under Floor Personalized Ventilation,TU831
  5. A Comparative Study on Energy Consuming of Hybrid Ground-source Heat Pump Systems,TU831
  6. Simulation Study of Thermal Comfort in Station Waiting Hall with Different Air Supply Method,TU831
  7. Study on Optimal Operation Strategies of Air Conditioning System,TU831.3
  8. The Simulation Research of Non-steady Thermal Comfort of Railway Station,TU831
  9. The Study of Ground Temperature in GSHP System in the Model of Heating,TU831
  10. Study on Uncertainty of the Rock-soil Thermal Response Test in Ground-Coupled Heat Pump System,TU831
  11. Simulation Study of Air Distribution in Large Space of Station,TU831
  12. Ground Source Heat Pump System Simulation and Optimization,TU831.3
  13. CFD Simulation Study on Environmental Control System of a Subway Station Platform in Wuhan,TU831.8
  14. Study on the Energy Efficiency Prediction Model of the Plant of Central Air-conditioning System,TU831.4
  15. Research and Application of OTTV in the Cold Winter and Hot Summer Region,TU831
  16. Study on the Regulatory Role of Ground Source Energy Storage Pool to Indoor Thermal Environment,TU831
  17. A Study on the Constraining Effect of Expansion Device in Heat Pump System,TU831.3
  18. Integrated Design of Residence & Airflow Distribution System Based on the Principles of Underfloor Air Distribution System,TU831
  19. Study of Microbial Corrosion in Central Air-conditioning Cooling Water System,TU831.4
  20. Finned tube heat exchanger surface regularity of dust deposition,TU831
  21. GSHP CRAC system optimization and application research,TU831.3

CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Air-conditioning > Air-conditioning systems
© 2012 www.DissertationTopic.Net  Mobile