# How do I go about the calculations for an air conveyor?

• Luchee
In summary, this expert summarizer provides a detailed analysis of the conversation, which includes answering questions about the mechanics of an air conveyor, the dimensions of the table, the pressure needed to float objects, and the air flow needed to operate the conveyor.
Luchee
TL;DR Summary
I am trying fabricate a contactless air conveyor.
How do I go about the calculations for an air conveyor that has the same working principle as an air hockey table?
The conveyor should not he bulky seeing as it is a prototype.

Luchee and russ_watters
Welcome to PF.

You are starting with a small prototype, but will find later that, at a realistic scale, the game changes entirely. You must develop an understanding of the principles, and restrict your design to a conveyor that can be operated economically, without a waste of compressed air. Calculations will be needed to select the character or topology of the system. Calculations will then be needed to optimise the selected design.

The design complexity can be reduced by considering the possible answers to the following questions.
1. Will there be a standard moving puck or tray to support all loads, or will the items moved have an integrated puck, and so be restricted to fit the conveyor line ?
2. How will items be propelled to move along the line ?
3. How will you reduce the air supply to parts of the conveyor bed that are not being used ?

Luchee said:
TL;DR Summary: I am trying fabricate a contactless air conveyor.

How do I go about the calculations for an air conveyor that has the same working principle as an air hockey table?
You start by defining in detail exactly what you are conveying:

1) What are you conveying?
2) How heavy are they?
3) What are the dimensions of the surface of the objects in contact with the table?
4) How flat is the surface in contact with the table?
5) How rough is that surface?
6) Is the object porous?
7) Does the table need to move the objects, or merely float them?
8) What are the table dimensions of your prototype, and the finished table?

Use that information to calculate:
10) Calculate the average pressure to float the objects.
11) Calculate the minimum flow rate under the objects.
12) Calculate the plenum pressure.
13) Calculate the air flow through the uncovered holes (or use air table check valves).
14) Calculate total air flow.

Answering questions 1 through 8 above will give you the information to answer 10 and 11. I suggest that you give detailed answers to questions 1 through 8, then we can help you from there.

Luchee
Thank you. I will start up on the findings and get back to you. Thank you very much

berkeman
Luchee said:
Thank you. I will start up on the findings and get back to you. Thank you very much
if you have any updates in your work would love to get some info will help so much

## 1. How do I calculate the air velocity required for an air conveyor?

To calculate the air velocity required for an air conveyor, you need to consider the weight, size, and shape of the items being conveyed, as well as the friction between the items and the conveyor surface. The basic formula is: Air Velocity (V) = (Weight of Item (W) / (Cross-sectional Area (A) * Coefficient of Friction (μ))). This will give you a starting point, but adjustments may be necessary based on specific conditions and requirements.

## 2. What is the formula for determining the airflow rate for an air conveyor system?

The airflow rate (Q) can be calculated using the formula: Q = V * A, where V is the air velocity and A is the cross-sectional area of the conveyor duct. Ensure that the units are consistent when performing these calculations. For example, if V is in meters per second (m/s) and A is in square meters (m²), then Q will be in cubic meters per second (m³/s).

## 3. How do I calculate the pressure drop in an air conveyor system?

The pressure drop (ΔP) in an air conveyor system can be calculated using the Darcy-Weisbach equation: ΔP = f * (L/D) * (ρ * V² / 2), where f is the friction factor, L is the length of the conveyor, D is the diameter of the conveyor duct, ρ is the air density, and V is the air velocity. This equation helps you understand the energy losses due to friction within the system.

## 4. What factors should I consider when sizing the ductwork for an air conveyor?

When sizing the ductwork for an air conveyor, you should consider the following factors: the volume of air required (airflow rate), the velocity of the air, the type and size of the conveyed items, the length of the conveyor system, and the pressure drop. Additionally, you should account for any bends, fittings, or other obstacles that may affect the airflow. Proper duct sizing ensures efficient operation and minimizes energy consumption.

## 5. How do I determine the power requirements for the blower in an air conveyor system?

The power requirements for the blower can be determined using the formula: Power (P) = Q * ΔP / η, where Q is the airflow rate, ΔP is the pressure drop, and η is the efficiency of the blower. This formula helps you calculate the mechanical power needed to overcome the pressure drop and maintain the desired airflow rate. Ensure that the blower selected can provide the necessary performance while operating efficiently.

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