Multistage high-efficiency cooling system

The multistage cooling system addresses inefficiencies in data centers with both liquid-cooled and air-cooling components by using outdoor and indoor chillers to adjust coolant temperatures flexibly, optimizing power consumption and costs through flexible temperature adjustment and free-cooling modes.

WO2026152014A1PCT designated stage Publication Date: 2026-07-16THERMAL WORKS LLC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
THERMAL WORKS LLC
Filing Date
2026-01-09
Publication Date
2026-07-16

AI Technical Summary

Technical Problem

Data centers with both liquid-cooled and air-cooling components face inefficiencies in coolant temperature management, leading to increased power consumption and high costs due to the need for separate cooling systems and temperature ranges that do not overlap, making retrofitting expensive and difficult.

Method used

A multistage cooling system that utilizes outdoor chillers to supply coolant at a first temperature, with indoor or zone chillers adjusting the coolant to a second temperature for air-cooling components, allowing flexible temperature adjustment based on operational parameters and component ratios, and incorporating free-cooling modes to optimize power consumption.

Benefits of technology

The system enhances cooling efficiency by reducing power consumption and costs through flexible temperature adjustment and free-cooling, optimizing coolant distribution for both liquid-cooled and air-cooled components.

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Abstract

A multistage high-efficiency cooling system provides coolant to both a coolant distribution unit fluidically coupled to liquid-cooled components and an air-cooling component located proximate to air-cooled components via a zone chiller. Depending on a percentage of air-cooled components versus liquid-cooled components within the system, and optionally ambient temperature, the system determines whether to adjust the temperature for the coolant provided to the air-cooling component. In one instance, the outdoor chiller provides the coolant to both the coolant distribution unit and the air-cooling component at a first temperature for operation of the cooling distribution unit, and the zone chiller adjusts the first temperature of the coolant to a different second temperature for the air-cooling component. Alternatively, the outdoor chiller provides the coolant to both the coolant distribution unit and the air-cooling component at the temperature required for operation of the air-cooling component, without substantial adjustment of temperature by the zone chiller.
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