Describe the basic components of airflow, how to measure them, and how they relate to each other. Explain how to read fan curves, and what this knowledge helps to avoid. Apply the Affinity laws for troubleshooting and solving problems. The …

Air velocity can be measured by sensing the pressure produced by the movement of the air. This application note will describe the basic relationships between air velocity and the pressure generated by air flow.

2019年7月10日 · This article explains the basic principle of air movement; how creating a pressure differential is the key to creating a flow of air; and how we can measure pressure – the first step in selecting the right fan to provide the desired air flow.

2007年1月22日 · It makes sense that you need to know how air flows in ducts and what factors affect the flow. A good understanding of airflow is needed for different specialties in the HVAC industry, such as: • Service work. • Testing, adjusting, and balancing. • Energy management. • Indoor air quality work. WHY MOVE AIR?

theoretical and practical guide to the basics of designing air flow systems. 1.1. Types of Flow. 1.2. Types of Pressure Losses or Resistance to Flow. 1.3. Total Pressure, Velocity Pressure, and Static Pressure. 2.1. Fan Laws. 2.2. Air Density. 2.3. System Constant. 3.1. Sections in Series. 3.2. Sections in Parallel. 3.3. System Effect. 4.1.

How to start an air system and diagnose common problems associated with air system start-up. Fundamentals of Air Flow - Static and dynamic compressible fluid (air) laws, friction effects, the friction chart, and density and altitude effects.

Identify basic airflow concepts and science. Recognize the types of equipment and devices that are part of modern air distribution and ventila-tion systems for home and commercial applications. Identify the major sources of indoor air pollution and contamination.

To illustrate the air distribution basics and the issues faced when implementing a robust duct design methodology for an energy efficient house, two theoretical houses that meet the 2009 International Energy Conservation Code (IECC) prescriptive path were modeled.

Designing an effective air distribution system and duct layout requires a thorough understanding of fluid dynamics including vital aspects like air velocity, pressure, and the conservation of mass. Starting with the basics, let's start at the most elementary level of airflow fundamentals. 1.2.1 Basic Definitions

2019年5月15日 · Let’s look at the three basic components of airflow: volume, velocity and pressure. Volume. Standard air is air that is 70ºF with 50% RH, at sea level. We measure air volume as a rate in cubic feet per minute (cfm). 1 ft3 of standard air weighs .0741 pounds. 13.33 ft3 = 1 pound of air.