Views: 0 Author: Site Editor Publish Time: 2026-02-27 Origin: Site
Dry coolers are highly energy-efficient for GPU immersion cooling systems and are one of the main reasons immersion cooling achieves very low total cooling power consumption.
Dry coolers rely only on:
Fans
Circulation pumps
They do not use compressors, unlike traditional chillers. This eliminates the largest source of cooling energy consumption.
GPU immersion cooling allows higher operating temperatures:
Typical supply temperatures: 35–55 °C
Return temperatures: 45–65 °C
Because the coolant is warm, dry coolers can reject heat efficiently even at moderate ambient temperatures, significantly increasing free-cooling hours.
Typical parasitic power consumption:
1–3% of IT load for fans and pumps
With EC or VFD-controlled fans, this can be even lower at part load
For example, a 1 MW GPU load may require only 10–30 kW for heat rejection.
When combined with immersion cooling:
Effective system COP > 20 is common
In favorable climates, COP values can exceed 30–40 during free cooling operation
This is significantly higher than air-cooled or chiller-based systems.
Dry coolers help immersion-cooled facilities achieve:
PUE of 1.05–1.10, depending on climate and design
Minimal seasonal efficiency variation
This is ideal for HPC, AI, and hyperscale GPU deployments.
Modern dry coolers use:
EC fans
Variable-speed pump control
At partial IT load, fan speeds drop sharply, reducing power consumption while maintaining required fluid temperatures.
Energy efficiency improves further in:
Temperate and cold climates
Night-time and winter operation
In many regions, 100% free cooling is possible for most or all of the year.
Dry coolers are energy-efficient for GPU immersion cooling because they:
Eliminate compressor energy
Operate efficiently at high coolant temperatures
Consume minimal parasitic power
Enable year-round free cooling
Deliver extremely low PUE values
This makes dry coolers a core technology for sustainable, high-density GPU data centers.
