Calculation of air duct load losses

This program will show you how you can analyze the pressure drops of quadrangular or circular channels produced with various materials. By entering a few essential data, you get the results immediately. You know immediately how many m² of duct you will use. By entering the thickness of the ducts in tenths and inserting the "scrap", you also obtain the weight of the ducts.

The calculation of pressure drops in air ducts is a fundamental component in the engineering of ventilation and air conditioning (HVAC) systems. This process is crucial to ensuring that air distribution systems operate efficiently and effectively, minimizing pressure losses and ensuring uniform airflow throughout the building or facility.

The reason for this program

This program was designed and created by Itieffe, with the aim of providing a comprehensive overview of the calculation of pressure drops in air ducts. We will explore the key concepts, formulas, calculation tools, and best practices used by HVAC engineers and system designers to determine and mitigate pressure drops.

Understanding the calculation of pressure drops is essential to ensure energy efficiency, thermal comfort and indoor air quality in residential, commercial and industrial buildings. An accurate design of the air ducts, which takes into account pressure drops, helps to reduce operating costs, avoid oversizing or undersizing of fans and ensure the correct functioning of the entire HVAC system.

With this program, we will guide you through the process of calculating pressure drops in air ducts, explaining the basic principles and offering practical examples. We'll explore how to take into account important variables, such as air velocity, channel shape and length, and more.

We are happy to accompany you on this crucial learning journey, which will equip you with the skills necessary to design, install and maintain efficient and high-performance HVAC systems. Mastering the calculation of pressure drops in air ducts will help ensure the comfort and sustainability of built environments, while promoting operational cost reduction and energy efficiency.

Calculation of air duct load losses

How is the calculation performed to determine the pressure drops of the ducts used for air conditioning distribution?

This simple program will show you how.

You can choose quadrangular or circular ducts produced with various materials.

With the insertion of few essential data, the results are obtained immediately.

You know immediately how many m² of channels will be used.

By entering the thickness of the ducts in tenths and inserting the "scrap", the weight of the channels is also obtained.

Instructions

Calculation of channel load losses

Let's analyze the program

The program carries out the analysis of the pressure drops of a circuit, without taking into consideration the dimensional calculations of the pipes that must be carried out with other programs on the site (the dimensions adopted are only for descriptive purposes).

1 - we choose the material with which the pipes are made (drop-down menu).

2 - choose whether quadrangular or circular channels (quadrangular in the example above).

3 - insert the scrap (additional weights for brackets, flanges, special pieces, etc.) normally values between 1,05 and 1,4.

4 - for the section of duct under analysis, in the case of quadrangular ducts, enter respectively: air flow, base and height - in the case of circular ducts (see example in the drawing below), enter the air flow rate and the chosen diameter (standardized measurement).

5 - enter the length of the canalization in meters.

6 - insert the thickness foreseen in tenths for the canalization.

7 - repeat the operations from point 4 to point 6 for the following trunks.

8 - now read the results indicating: the pressure drops in Pascal, the square meters and the weight in kg of the ductwork.

Easy right?

good job

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Calculation of air duct load losses

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