Tag: venturi cooler

Take Advantage of the EXAIR Cold Gun Promotion

Published on by jasonkirbyLeave a comment

EXAIR is pleased to announce the revival of its Cold Gun Promotion, which will be available exclusively through online channels. This promotion runs from November 1, 2024, until the end of the year, offering customers an exceptional opportunity to enhance their cooling capabilities. Those who purchase either the promotional Cold Gun System with a Single Point Hose Kit or the promotional High Power Cold Gun System with a Single Point Hose Kit will receive a complimentary Dual Point Hose Kit. This additional kit is equipped with standard point tips and 1-inch fan tips, enabling users to efficiently cool multiple surfaces of large-diameter cutters and components that necessitate effective cooling solutions. This promotion not only enhances the functionality of the Cold Gun Systems but also provides users with the tools needed to optimize their operations.

Cold Guns Systems

If you are seeking an effective method to prolong the lifespan of your tools by maintaining a cooler operating temperature without the complications associated with traditional coolants, our Cold Gun is an ideal choice. When connected to a source of compressed air, both the Cold Gun and the High Power Cold Gun generate a stream of clean, cold air that can reach temperatures as much as 50°F lower than that of the incoming compressed air. This innovative tool operates at a remarkably low noise level of just 70dBA and is designed with no moving parts, which eliminates the risk of wear and tear over time. Simply provide it with clean, dry compressed air, and you can expect it to function maintenance-free for many years, ensuring a reliable and efficient cooling solution for your needs.

The Cold Gun features a magnetic base that facilitates straightforward installation and mounting, making it a convenient choice for various applications. This innovative tool serves as an excellent substitute for traditional coolant mist systems, which can be both messy and costly. By utilizing the Cold Gun, users can significantly reduce expenses associated with the purchase and disposal of cutting fluids, while also mitigating health risks for workers who might otherwise be exposed to airborne coolant or face hazards from slippery floors. Furthermore, transitioning to a system that does not rely on coolant eliminates the necessity for additional cleaning processes following milling or drilling operations, thereby streamlining workflow and enhancing overall efficiency in the workplace.

 If you have any questions about Cold Gun promotion, or anything regarding EXAIR and our products, please do not hesitate to reach out. We would love to hear from you!

Jason Kirby
Application Engineer
Email: jasonkirby@exair.com
Twitter: @EXAIR_jk

Cold Fraction Explained

Published on by jasonkirbyLeave a comment

EXAIR has published numerous articles detailing the functionality and applications of Vortex Tubes. This innovative technology, which produces cold air without the use of Freon or mechanical components, is rooted in physical principles and has been known by various names, such as the Ranque Tube, Ranque-Hilsch Tube, and Maxwell’s Demon. Today, it is commonly referred to as the Vortex Tube, capable of generating air temperatures as low as -50 °F (-46 °C) through the high-speed rotation of compressed air. In this article, I will discuss how to adjust the Vortex Tube to achieve varying temperatures and cooling effects, focusing on the concept of Cold Fraction.

The term “Cold Fraction” refers to the proportion of supply air allocated to the cold end of a system. A higher Cold Fraction indicates an increased flow and temperature of the cold air, while a lower Cold Fraction results in diminished cold air flow and temperature.

The performance chart below illustrates how the settings for “Pressure Supply” and “Cold Fraction %” influence the operation of Vortex Tubes. For instance, with an operating pressure of 100 PSIG and a cold fraction set at 20%, the cold side experiences a temperature drop of 123°F, while the hot side sees a rise of 26°F. Conversely, maintaining the same pressure of 100 PSIG but adjusting the cold fraction to 80% results in a 54°F decrease on the cold side and a significant 191°F increase on the hot side.

EXAIR Vortex Tube Performance Chart

In a convection or conduction air cooling application, two key factors must be considered: the air flow rate and the temperature difference between the cooling air and the heated component. It is advisable to begin with the maximum cold fraction; however, you may discover that a slightly reduced flow rate, along with the corresponding lower temperature, could better meet your requirements. The positive aspect of this adjustment is that it does not affect compressed air consumption, allowing you to enhance performance without incurring additional operational costs.

If you have any questions about Vortex Tubes, or anything regarding EXAIR and our products, please do not hesitate to reach out. We would love to hear from you!

Jason Kirby
Application Engineer
Email: jasonkirby@exair.com
Twitter: @EXAIR_jk

Super Air Amplifier vs Fan

Published on by Al WooffittLeave a comment

One of the more common applications we work with is cooling. In most instances, the goal is to cool the part as quickly as possible. In order to cool faster, you would think that blowing the coldest air possible would be the best option. Our Vortex Tubes can produce air as cold as -50°F! However, in many instances, more effective cooling will be achieved through larger volumes of air. As long as the ambient air temperature is lower than the target temperature, larger volumes of ambient air will outperform a small volume.

Our Super Air Amplifier is a great option for producing large volumes of laminar (non-turbulent) airflow for minimal compressed air consumption. Using a Coanda profile along with a patented shim, compressed air exits the Amplifier in a manner that generates a low pressure zone, which helps pull in the surrounding ambient air. This creates an amplification ratio of up to 25 times! Due to the laminar output flow having the same speed and direction, it is very effective at removing heat from a target. It also helps keep noise levels down.

The most common, non-compressed air alternative to our Amplifiers is an electric fan. Fans utilize motors and blades to direct air towards their target. When air comes in from behind the fan, the blades push the air forward to the target. This action generates turbulent air flow, as well as a lot of noise. Due to the use of motors, there are parts that can wear out over time, leading to additional maintenance costs over the lifetime of the fan.

Ultimately, when it comes to cooling, what we care about most is how quickly a given solution will get the job done. Is a Super Air Amplifier going to cool faster than a fan? In the video below we put both options to the test. As you will see, the Super Air Amplifier is significantly faster:

If you have a cooling application that you would like to discuss, give us a call!

Al Wooffitt
Application Engineer

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Robert Boyle and Boyle’s Law

Published on by Al WooffittLeave a comment

We’ve written many blogs about our intelligent compressed air products; we have a lot of great products to talk about (our Vortex Tubes are my favorite). Occasionally, we like to talk about certain people of interest, or people that have had an impact on the compressed air industry. In this blog I am going to cover one of those people: Robert Boyle.

Born on January 25, 1627, at Lismore Castle in County Waterford, Ireland. He was an Anglo-Irish natural philosopher, chemist, and physicist, and he explored various other fields of study. In 1661, he published his book The Sceptical Chymist, which many regard as the cornerstone of modern chemistry.

Even though his main focus was chemistry, one of Boyle’s most notable scientific contributions is what we now call the first gas law, aptly named Boyle’s Law. Boyle’s Law explains how pressure and volume relate in a closed space when considering the mass of an ideal gas. Boyle, along with his assistant Robert Hooke, utilized a closed J-shaped tube and added mercury from the open end, which caused the air on the opposite side to compress due to the pressure. After conducting this experiment with various amounts of mercury, Boyle concluded that the pressure of a gas is inversely related to the volume it occupies.

Boyle used a ‘J’ Tube – Sealed on the Short End, and Open at the Long End

This relationship between pressure and volume is of obvious interest to us in the compressed air industry. Nitrogen, oxygen and hydrogen (the three primary components of air) are ideal gases, so are governed by this relationship. This means that if we reduce the volume of a given space, the air inside that space will increase in pressure. This principle plays a key role in various areas of air system design as well, including determining compressor output, reservoir storage, pneumatic cylinder efficiency, and more.

Sadly, on December 31, 1691, Robert Boyle passed away. However, the impact he made on fluid dynamics lives on to this day. At EXAIR we use the pressure and volume of compressed air for our products to make them quiet, safe and efficient. If you have questions about any of our quiet EXAIR Intelligent Compressed Air Products, feel free to contact EXAIR or any Application Engineer.

Al Wooffitt
Application Engineer

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Find us on the Web
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Twitter: @EXAIR_AW