Supplemental Heat Exchanger Bypass for Data Center Cooling

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Solution Overview

Problem

Data centers face challenges with high energy consumption, complex infrastructure, scalability issues, environmental impact, and potential system failures in cooling systems, particularly due to the inefficiencies and limitations of traditional cooling methods.

Innovation Solution

A novel cooling system utilizing a refrigerant supply and return line with bypass lines and adjustable valves to manage refrigerant temperature, allowing it to bypass heat exchangers and recirculate at optimal temperatures, enhancing efficiency and compatibility with modern chillers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional air conditioning systems are used to cool data centers, then cooling function is provided, but energy consumption increases significantly

Engineering Contradiction:

Improvedata center temperatureVSAvoidcooling system energy consumption

Core Design Contradiction:

TemperatureVSUse of energy by moving object

Solution Approach 1:

The cooling system is divided into multiple independent heat exchangers (first heat exchanger, second heat exchanger, third heat exchanger) that can operate independently or in combination. Each heat exchanger serves specific cooling needs, allowing the system to segment the cooling load and optimize energy consumption by activating only the necessary components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts refrigerant flow distribution among different heat exchangers based on operating conditions. By changing flow parameters and activating bypass lines selectively, the system optimizes the balance between cooling effectiveness and energy consumption, reducing overall power requirements while maintaining temperature control.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If heat exchangers operate at maximum capacity to extract heat, then cooling efficiency improves, but refrigerant temperature may exceed safe limits

Engineering Contradiction:

Improveheat extraction efficiencyVSAvoidrefrigerant temperature safety

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Bypass lines act as intermediary pathways that allow refrigerant to circumvent certain heat exchangers. By introducing these bypass routes, the system can regulate refrigerant temperature and flow distribution, preventing temperature extremes while maintaining optimal heat extraction performance through controlled refrigerant circulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system employs adjustable flow distribution and dynamic refrigerant management that adapts to changing operational conditions. Flow rates and refrigerant distribution are continuously adjusted to maintain optimal temperatures, ensuring both high heat extraction efficiency and safe operating limits are simultaneously achieved.

Inventive Principle:

Principle #15Dynamics

3Productivity

If multiple heat exchangers are added to improve cooling capacity, then heat extraction capability increases, but system complexity increases

Engineering Contradiction:

Improveheat extraction capabilityVSAvoidcooling system structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Multiple heat exchangers are integrated into a unified cooling system architecture where they share common refrigerant lines, control mechanisms, and operational protocols. By merging the control and infrastructure elements while maintaining separate heat exchange functions, the system achieves enhanced heat extraction capability without proportionally increasing operational complexity.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system reduces energy consumption, minimizes environmental impact, improves scalability, and ensures seamless integration with existing chiller systems by maintaining refrigerant temperatures within safe operating limits, thus preventing system failures.

Implementation Method 1

a refrigerant circulation loop comprising a first heat exchanger configured to use the refrigerant circulating therethrough to cool air or liquid which passes through the first heat exchanger

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

a refrigerant supply line providing a refrigerant at a first pressure from a refrigerant source, a refrigerant return line directing the refrigerant at a second pressure toward the refrigerant source for cooling and recirculating of the refrigerant thereat

Methodology Applied

Scientific EffectPhase change: Phase Change

Data Source

PatentUS20250393173A1High-efficiency cooling systems and methods for a computer data center using a supplemental heat exchanger

Publication Date: 2025.12.25 KLEIN BRADLEY JOHN

AI summary

To increase energy efficiency when cooling equipment in a computer data center, a supplemental heat exchanger positioned outside the facility is provided to passively extract at least some heat before directing refrigerant to the refrigerant return line. Temperature sensors may be provided to direct the refrigerant either to the supplemental heat exchanger if the refrigerant temperature exceeds the ambient temperature or to bypass the supplemental heat exchanger and flow directly to the refrigerant return line in case the refrigerant temperature is below the ambient temperature.