Engineering Case Studies

Application requirements, product choices and engineering project stories from LONGWELL.

electronic cooling use cases
By longwell / July 22, 2026 / Engineering Case Studies

Custom 48V 2900 RPM Cross Flow Fan for OEM Cooling

Case study on a custom 48V DC cross flow fan from Longwell, modified t...

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Forward-curved centrifugal blower after an EC motor retrofit
By longwell / July 21, 2026 / Engineering Case Studies

Keep the Scroll, Change the Motor

The aerodynamics already worked. Everything difficult about this proje...

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Free cooling fans replacing air conditioning in a telecom shelter
By longwell / July 21, 2026 / Engineering Case Studies

Four Thousand Towers Stop Paying for Refrigeration

An air conditioner refrigerates a room. Most equipment does not need a...

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LWCA cross flow fan
By longwell / July 21, 2026 / Engineering Case Studies

Custom 2300 RPM Cross-Flow Fan for 2300W Air Curtain Heaters

An OEM required a 2300 RPM cross-flow fan for a 2300W air curtain. Lon...

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poultry fan
By longwell / July 21, 2026 / Engineering Case Studies

LWPVL-1270T Poultry Barn Exhaust Fan for 51,000 m³/h Airflow

Case study on a high-volume ventilation solution for poultry barns, de...

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900mm dual-speed condenser fan for an air-cooled condenser unit
By longwell / July 20, 2026 / Engineering Case Studies

Dual-Speed 900mm Condenser Fan: 27,089 m3/h on Two Windings

Two speeds without a drive, a controller or any electronics at all. So...

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Forward-curved PTC heater blower for a compact space heater
By longwell / July 20, 2026 / Engineering Case Studies

The Heating Element Is the System Resistance

The customer sent a power figure, a plug type and a picture. No airflo...

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A 250mm condenser fan rated for 30,000 hours L10 bearing life
By longwell / July 20, 2026 / Engineering Case Studies

30,000 Hours Is a Survival Rate, Not a Warranty

Every datasheet quotes an L10 figure and almost nobody reads it correc...

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By longwell / July 18, 2026 / Engineering Case Studies

LWAA4D450S-5MEB-39-00 AC Axial Fan for Condenser Units

Case study on a 450mm AC axial fan delivering 7,004 m³/h for a commerc...

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Impeller reverse engineering of a 300mm 8-blade metal axial wheel
By longwell / July 18, 2026 / Engineering Case Studies

The Last Supplier Measured It With Calipers

They had tried this before with another supplier and got a drawing bac...

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