When Outdoor Air Can Cool a Telecom Shelter
A telecom shelter releases heat whenever its equipment operates. Sometimes cooler outdoor air can carry that heat away directly. At other times, the cooling unit must use its refrigeration system.
Follow the air through the process
Open a controlled outdoor-air path
In direct free-cooling mode, the outdoor-air damper opens and the fan delivers filtered air into the shelter. A corresponding exhaust path lets warmer room air leave, completing the exchange.
Mix when outdoor air is very cold
The controller can regulate how much outdoor air enters and how much room air recirculates. This avoids treating colder weather as a reason to deliver uncontrolled cold air directly to the electronics.
Use mechanical cooling when needed
As outdoor conditions become less useful, a mixed mode can combine outside air with refrigeration. When outdoor air cannot provide useful cooling, the refrigeration circuit carries the load while room air circulates through the indoor coil.
Check more than temperature
The operating decision must respect the site's temperature, humidity and air-quality limits. Filters, dampers and sensors are part of this system; a fan alone cannot decide whether outdoor air is suitable.
Airflow function
- In the shelter air handler, moving filtered outdoor and recirculated air according to the selected cooling mode.
- A backward-curved centrifugal family can be assessed at the different pressure-and-flow duties created by filters, dampers and the indoor coil. The control interface must follow the shelter cooling strategy.
What can change the result
- An unsuitable outdoor-air condition is used for direct cooling.
- Filter loading or damper position reduces actual airflow.
- Missing exhaust provision or a shortcut weakens room heat removal.
Start with the complete air path
Share your layout and the information you already have. Unknown values can be identified before a configuration is selected.
Match the fan to this air path
Evaluate LONGWELL EC backward-curved centrifugal fans for the required flow and pressure across those modes. Confirm controls, available space and the shelter's environmental duty.
Where it sits
In the shelter air handler, moving filtered outdoor and recirculated air according to the selected cooling mode.
Why consider this configuration
A backward-curved centrifugal family can be assessed at the different pressure-and-flow duties created by filters, dampers and the indoor coil. The control interface must follow the shelter cooling strategy.
Check the result in your equipment
Discuss your shelter cooling modes
Send shelter heat load, indoor and outdoor design conditions, outdoor-air quality and humidity limits, airflow and pressure in each mode, damper and speed control interface, installed size and environmental requirements. Ask LONGWELL to review a suitable configuration, fan curve, drawing and control details. A layout or existing fan model can start the review.
A layout, installation photos or your existing model is enough to start the discussion.