Velocidad del aire, Sistemas de ventilación
Velocidad del aire, Sistemas de ventilación
Is it important to measure air speed?
Before carrying out a project to control dust, fumes, mists or gases in the company, you must collect as much information and data that will allow you to carry out the correct and necessary calculations, one of the most important is that of the Air Velocity or CFM.
What is air velocity?
The airspeed, is generally defined as the movement that occurs in a horizontal direction to the Earth, this is not a mass of gas at rest, on the contrary, it is a very thin veil with fluidity and completely variable, with various thermal contrasts, this massive displacement of large masses of volumes of air with defined speeds and direction is called wind.
The airspeed, is one of the main data that we take into account for the design and manufacture of a dust collection system. Defining the capture speed will allow us to know the air flow, the diameter of the ducts, the collection area, the fan capacity, among other factors that will help maintain the speed of the air mass.
What is the air mass?
This is the most important consideration for the application in drying, combustion and general ventilation processes, which need a certain amount of air mass, these are usually measured in lbm/𝑓𝑡 ³ or Kg m/m³.
What is CFM?
The volumetric flow rate, hereafter called “volume“ (𝑣), is defined as the amount of air that passes a given place per unit of time. It is related to the average velocity and cross-sectional area of the duct given by the equation:
𝑄=𝑉𝐴
where:
Q = volumetric flow rate, cfm
V = mean velocity, fpm
A = área de la sección transversal, (〖𝑓𝑡〗^2 )
For instance; The capacity tables of industrial fan manufacturers are published in ACFM (Actual Cubic Feet Per Minute), the required air mass must be converted from SCFM (Standard Cubic Feet Per Minute) to ACFM (Actual Cubic Feet Per Minute). The transport speed in the system can be defined once we define the ACFM air volume.
The design of a dust collection system, fumes or ventilation system, part of the work of analyzing and calculating in real terms the volume or velocity of the air that must move and; thus being able to size and select the necessary components of the system to carry out the work, such as ducts, hoods, fan, etc.
DYNA FLO® Tips:
- Before investing in an industrial ventilation system, consult an expert in the field, give us a call.
Collector Types
Velocidad del aire, sistemas de ventilación
Velocidad del aire
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Benefits of a dust collector
If your company works with metals, chemicals, ceramics, cements, flours, smelting furnaces, rock grinding, marble, granite, welding, explosive or ignition-prone materials, sand blast booths, painting booths, polishing and detailing of parts , oils, among many other items in closed or open spaces, then you need to have an intelligent system for collecting dust, fumes or mists and know its benefits.
Interpreting the pressure differential
If the pressure differential is less than expected, look between:
Inappropriate system design that reduces the amount of air to levels below design.
Air leaks at some point in the duct system Blockage at some point in the
CAN VELOCITY
Interstitial Velocity, or CAN Velocity, is defined as the upward velocity of air through the open area between filter bags within a dust collector.
