STATIC BALANCE DUCT DESIGN METHOD R1 （静态平衡管设计方法R1）.pdfVIP

STATIC BALANCE DUCT SIZING METHOD Author: Engr. K.H., Kong is Mechanical Engineer (IEM member, No: M21065) Bachelor’s Degree with Honors with Distinction in Mechanical Engineering STATIC BALANCE DUCT DESIGN METHOD STATIC BALANCE DUCT DESIGN METHOD ABSTRACT Generally, the duct design methods for low velocity supply air system that are currently used include 1. Velocity reduction 2. Equal Friction, and 3. Static Regain In this write up, a novel duct design method, known as the static balance duct design method, is introduced. In this method, the duct looping or network principle is applied to achieve static balance. The Static balance method is an intelligent self- balance method to achieve minimum static losses across the ducting network. In turn, energy consumption is reduced. Static balance method is also well applicable to the variable air volume (VAV) system. It reduces the system response time, the operating static losses within the duct network system, and enhances the energy saving. 1.0 INTRODUCTION In this write up, the description for the conventional and static balance duct design method is presented in chapter 2. The Equal friction and static balance methods are compared and discussed in detail. Chapter 3 discusses about the equal friction method. A few equations involved in the development of the equal friction method are presented. In chapter 4, the development and the principal of static balance method are discussed in relation to the equal friction method. Comparisons of the equal friction and static balance are discussed in chapter 5. Chapter 6 brings up the advantages of the static balance method for VAV system and followed by a final conclusion. Copyright © 2008 by Kok-Haw Kong