InRow Liquid Cooling Module With Leak Detection for Dense IT Racks
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Solution Overview
Problem
Existing cooling systems, such as CRAC units, struggle to effectively manage the thermal environment in high-density electronic racks due to increased heat load, and liquid cooling solutions face challenges like leakage and compatibility issues with diverse IT equipment components.
Innovation Solution
The InRow liquid cooling module, which includes a main fluid distribution manifold, mounting section for cooling modules, and a leak detection mechanism, allows for adjustable cooling capacity and separate positioning from the electronic rack, using single-phase or two-phase liquid-to-liquid heat exchangers to create heat-transfer loops and mitigate leakage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CRAC units are used to cool conventional racks, then thermal environment is maintained, but cooling effectiveness deteriorates for high-power density racks
Solution Approach 1:
The cooling system is divided into modular InRow cooling units that can be independently deployed alongside specific racks. Each module contains integrated components (manifold, heat exchangers, pumps) that can be scaled and configured to match the thermal density of individual racks, enabling effective cooling of high-power density equipment without requiring complete system replacement.
Solution Approach 2:
Liquid-to-liquid heat exchangers serve as intermediary devices between the rack-mounted cooling plates and the InRow cooling modules. This intermediate heat transfer mechanism allows thermal energy to be efficiently transferred from high-density electronics through coolant loops, bridging the gap between localized heat generation and centralized cooling capacity.
2Productivity
If liquid cooling is implemented for high-density racks, then cooling efficiency is improved, but leakage risk increases
Solution Approach 1:
The leak detection mechanism is extracted as a separate, dedicated subsystem within the InRow cooling module. This independent detection system continuously monitors coolant integrity and can isolate leaks before they cause damage to IT equipment, allowing the liquid cooling system to maintain high efficiency while mitigating the harmful effects of potential failures.
Solution Approach 2:
The system incorporates preventive leak detection and isolation capabilities that act as a cushion against potential leakage damage. By detecting leaks early and isolating affected sections before coolant can reach sensitive electronics, the system prepares defenses in advance rather than reacting to damage after it occurs.
3Temperature
If liquid cooling modules are integrated within the electronic rack, then cooling is provided, but leakage risk to equipment increases
Solution Approach 1:
The liquid cooling modules are extracted from the electronic rack interior and positioned as separate InRow units alongside the racks. This spatial separation maintains thermal coupling through dedicated coolant loops while physically isolating the liquid cooling infrastructure from sensitive IT equipment, thereby providing effective cooling while eliminating the risk of leakage damage to electronics.
Solution Approach 2:
Coolant loops and heat exchangers serve as intermediary thermal transfer mechanisms between the InRow cooling modules and the electronic equipment. This intermediate thermal pathway enables efficient heat removal while maintaining physical separation between the liquid coolant and electronic components, solving both thermal control and leakage protection requirements.
4Device complexity
If a single cooling system is used for diverse equipment, then system simplicity is maintained, but adaptability to different thermal requirements deteriorates
Solution Approach 1:
The InRow cooling modules are designed with universal interfaces and configurable cooling capacities that can accommodate multiple types of IT equipment with different thermal requirements. The modular architecture allows single InRow units to serve multiple racks or be scaled to match varying heat loads, providing adaptability across diverse equipment while maintaining relatively simple system operation through standardized protocols.
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
This solution provides efficient and adaptable liquid cooling for high-density racks, ensuring thermal equilibrium and reducing the risk of equipment damage from leaks, while accommodating different IT equipment types and sizes within a data center.
Implementation Method 1
Each cooling module is configured to 1) couple to the main supply line and to the main return line to circulate the coolant through the cooling module and 2) couple to a piece of IT equipment in an electronic rack via a supply line and a return line to create a heat-transfer loop that transfers thermal energy away from the piece of IT equipment and into the coolant that circulates through the module
Implementation Method 2
using single-phase or two-phase liquid-to-liquid heat exchangers to create heat-transfer loops
Data Source
AI summary
According to one embodiment, an InRow liquid cooling module for a database center includes a main fluid distribution manifold and a mounting section. The manifold has a main supply line that is configured to receive coolant from a coolant source and a main return line that is configured to return warmed coolant to the coolant source. The mounting section is configured to receive cooling modules, each module is configured to 1) couple to the main supply line and the main return line to circulate the coolant through the module and 2) couple to a piece of IT equipment in an electronic rack to create a heat-transfer loop that transfers thermal energy away from the equipment and into the coolant that circulates through the module. In one embodiment, the InRow concept may be deployed as part of a data center infrastructure or combined as part of an electronic IT rack.