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Thursday, February 7, 2019

Optimum Duct Design for Variable Air Volume Systems




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Description
The design of duct systems is an important factor for effective, energy-efficient, and comfortable heating, ventilating and air conditioning (HVAC) systems. Commonly utilized duct design procedures have been developed for constant air volume (CAV) systems and are based on peak load design conditions, for which the flow rates are assumed to be constant for the entire year. Yet, the most common system type for commercial office buildings is the variable air volume (VAV) system. VAV duct systems are commonly designed using maximum airflows to zones as if they are CAV systems. However, the VAV system spends much of the time at off-peak load conditions, providing less than peak-flow for many hours of the year. Conventional duct design methods do not account for the actual zone load profile. Consequently, VAV duct systems may not be designed optimally using current design methods. For this reason, duct design methods should be reconsidered for VAV systems.

Content:-
1. INTRODUCTION
2. OPTIMUM DUCT DESIGN FOR VAV SYSTEMS
3. FAN MODELING AND OPERATING COST CALCULATION
4. CHARACTERISTICS OF OPTIMUM DUCT DESIGN PROBLEMS
5. OVERVIEW OF PARAMETRIC STUDY
6. PAPAMETRIC STUDY
7. SUMMARY AND RECOMMENDATIONS
BIBLIOGRAPHY 
APPENDIX
APPENDIX A--Survey on the HVAC duct System Design
APPENDIX B--Tables for Parametric Study
APPENDIX C--BLAST Input Files
APPENDIX D--Institutional Review Board Approval

Author Details
"TAECHEOL KIM"



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