Panel Builder US

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January 3, 2022

When cooling an electrical enclosure, the airflow is an important factor to consider. However, to add to the complexity, different cooling products use air differently.Here is a  "must know" concept to ensure success for your application.  In order to make this distinction, it’s important to know the difference between open and closed-loop cooling, and why one system may be the better option for a specific application:

OPEN-LOOP cooling describes a process that replaces the air inside a chamber with “fresh” cooler air from outside the chamber. Open-loop cooling is the most commonly used process when the available air supply is cool enough and clean enough to provide the required heat removal. Open-loop ventilation uses ambient air to remove the heat, and may consist of small muffin-type fans that exhaust or supply an electrical cabinet, with optional filters to prevent airborne aerosols and dust from entering the cabinet. Fans have the advantage of utilizing a minimum amount ofFigure_1.open.jpg cabinet space and will move a substantial volume of air where flow is virtually unimpeded. Cost and complexity is minimized with this type of ventilation process. Where density of components impedes airflow, packaged blowers or motorized impellers may be arranged to operate against these higher static pressures. With a rack enclosure, supplemental fan trays may be used to spot cool or supplement other air-moving devices.See Fig 1.

CLOSED-LOOP cooling describes a process that reconditions (reuses) the air inside an enclosure. Air conditioners and heat exchangers are examples of cooling products that use a closed loop. The purpose of this system is to prevent contaminated air from entering and causing damage to critical components, and when maximum internal cabinet temperatures cannot be maintained using open-loop ambient air cooling, closed-loop systems are used to satisfy this requirement. If the ambient air is hostile, containing dirt, oil, humidity or corrosives, this will adversely affect the performance or ultimate longevity of the components. Many applications using intricate electronic/electrical components require a closed-loop cooling system to dissipate heat buildup without introducing outside contaminated air. Air-to-air heat exchangers, water-to-air Figure_2.closed.jpgheat exchangers and air conditioning units are great options to cool a confined amount of air within an enclosure. Air conditioners have the added ability to maintain a temperature lower than ambient and reduce the humidity within the controlled space.See Fig 2.and watch the video.

 

 

 

 

 

 

 

 

 

 

 

In harsh environments involving high temperatures, heavy particulates, oil or chemicals capable of damaging components, ambient air must be kept out of the enclosure. Sealed enclosures are generally used, with closed-loop cooling consisting of two separate circulation systems in a single unit. One system, sealed against the ambient air, cools and recirculates the clean cool air throughout the enclosure. The second system uses ambient air or water to remove and discharge the heat.

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https://www.kooltronic.com/blog-article/20/do-you-know-your-first-step-when-choosing-a-cabinet-cooler

 


 Network Infrastructure Featured Product Spotlight

PB 10 Panduit 400This webinar presented by Beth Lessard and Keith Cordero will be highlighting three Panduit solutions that will optimize network equipment and cabling to ensure that your spaces are efficiently and properly managed to support ever-evolving business needs of today and beyond. Products that will be featured include PanZone TrueEdge Wall Mount Enclsoure, Cable Managers, and Adjustable Depth 4-Post Rack.

REGISTER HERE

 

 

 

 


 

Editor's Pick: Featured Product News


The VCCS300 power supply series from Vox Power delivers a silent 300 Watts of continuous output power in a rugged and miniature 4” x 2” x 1.61” package, which can be cooled using conduction, convection or forced air cooling techniques.

VCCS300 is the ultimate power solution for applications where rugged reliability, high efficiency, silent operation and a medical BF rating are important factors and is supplied with a standard 5-year warranty.

Now available with standard output voltages of 12, 15, 24, 28, 36, 48 and 56VDC the VCCS300 platform can also be tailored to suit any other customer specific output voltage ranging between 12 – 58VDC without costly safety approvals and time consuming custom designs being undertaken.

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Sponsored Content

Achieve Industrial Control Panel Certification With UL

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UL’s Industrial Control Panel Shop program provides flexibility in certification of mass-produced and custom-designed industrial control panels. We share our expertise through technical training, workshops and advisory services focused on the needs of the ICP builders. Achieve UL Certification UL 508A while allowing for versatility in panel design. Contact us today to get started.

Learn more HERE.

 


 

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ditor's Pick: Featured Article


Astrodyne TDI has released the new ASM65 series of power supplies that deliver up to 65W of regulated DC output for applications including healthcare, industrial equipment, and commercial electronics.

As electronic equipment shrinks, the need for compact power supplies has gained importance. The new ASM65 switch mode power supply series was designed with space and weight in mind, to support the need for compact power solutions. These products are available in both open-framed and enclosed profiles with multiple connection options, including header and miniature terminal blocks, for ease of installation.

The ASM65 series is certified to meet the latest safety standards, including IEC 60601-1-1 3rd edition for medical applications, as well as IEC 62368-1(ICT) and IEC 60950 (ITE) for commercial and industrial solutions. To protect patients in medical settings, the ASM65 also offers BF leakage and 2x Means of Patient Protection (2 MOPP).

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Sponsored Content

Free Online PLC Training

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AutomationDirect’s website grants free access to a variety of PLC training videos, including in-depth training on AutomationDirect’s families of PLCs and additional automation topics. With no purchase necessary, PLC training videos and courses are available 24/7. More than 250 videos focus on non-brand specific PLC training, PNC 101 Intro, CLICK PLC, Do-more/BRX PLC and Productivity PLC.

Learn more HERE

 


 

Article Feature - Monthly Industry Focus


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Southco, Inc. has recently introduced the newest product in its successful C2 series of lever latches, with a new push to lock option that incorporates an auto-relock feature. With customizable features, versatile locking styles and a streamlined industrial appearance, the push to lock C2 Lever Latch provides upgraded functionality that can be used to demonstrate compliance with industry regulations.

The push to lock C2 Lever Latch from Southco offers a new auto-relock feature to comply with industry regulations requiring a key to access equipment panels, such as ISO-TS 28923. With adjustable grip that overcomes manufacturing tolerances and prevents gasket setting, and multiple locking styles, the C2 series can be customized to fit a variety of applications. An integrated bumper helps to absorb vibration and noise, while preventing scratches to the panel frame. Additionally, the push to lock C2 Lever Latch has been redesigned with a more modern industrial appearance, providing a fresh option for manufacturers and design engineers.

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Sponsored Content

Noise Mitigation for Control Panels White Paper

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A core issue inhibiting the performance and reliability of industrial control systems is noise. When overlooked, Electromagnetic Interference (EMI) can adversely affect system efficiency and uptime by interfering with analog signals and Industrial Ethernet transmissions. This white paper explores best practices and solutions for mitigating electrical noise while optimizing space of and within the control panel at the design stage.

Get Your Copy HERE

 

 


 

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Sponsored Content

Sealevel Announces the HazPAC 10 Rugged Panel PC for Hazardous Environments

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Sealevel Systems, Inc. announces the HazPAC10 Rugged Panel PC. Designed for Windows 10 IoT Embedded, the HazPAC 10 delivers powerful Intel processing combined with a bright, LCD, five-wire resistive touchscreen. The HazPAC 10 features a fanless industrial computer with a wide -40°C to 60°C operating temperature. And for the most intense environments, the HazPAC 10 has a NEMA 4/IP64 front bezel and is certified by ATEX, IECEx, and for Class I, Division 2 (Groups A, B, C, D, T4).

Learn More HERE