Rack Cooling Control Using Fan and Pump Speed Coordination
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Solution Overview
Problem
Existing cooling systems for electronic equipment racks require additional environmental cooling systems to manage the heat generated, which is inefficient and costly.
Innovation Solution
A liquid cooling system with a closed loop and an open loop is used to autonomously cool the rack, utilizing a controller to adjust fan and pump speeds based on temperature indications to optimize thermal management, reducing the need for external cooling systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fans are mounted within equipment racks to provide forced ventilation cooling, then cooling of rack-mounted equipment is improved, but heat is displaced to the general environment requiring additional environmental cooling systems
Solution Approach 1:
The patent converts the harmful heat expelled by fans into a useful resource by directing it through heat exchangers that transfer thermal energy to pre-cool incoming ambient air. This transforms waste heat into a beneficial cooling source, reducing the energy demand of environmental cooling systems while maintaining effective equipment cooling.
Solution Approach 2:
The patent introduces heat exchangers as intermediary devices between the fan-generated hot air and the incoming ambient air. These heat exchangers facilitate thermal energy transfer without direct mixing of air streams, enabling efficient heat recovery while maintaining system independence from external cooling infrastructure.
2Extent of automation
If a liquid cooling system with closed loop and open loop is implemented, then autonomous cooling is achieved, but system complexity increases
Solution Approach 1:
The patent divides the cooling system into distinct functional modules: a closed loop for direct equipment cooling, an open loop for ambient air pre-cooling, and a control system for autonomous operation. This segmentation allows each component to perform its specific function efficiently while simplifying overall system design and maintenance through modularity.
Solution Approach 2:
The patent implements autonomous cooling control that automatically adjusts fan speeds and pump operations based on real-time temperature sensor feedback. The system self-regulates without external intervention, using embedded controllers to monitor thermal conditions and adjust cooling output, thereby achieving true autonomous operation despite increased initial system complexity.
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 provides efficient and autonomous cooling of electronic equipment racks, minimizing the need for external cooling systems and optimizing energy usage.
Implementation Method 1
a liquid cooling system with a closed loop and an open loop is used to autonomously cool the rack
Implementation Method 2
The first heat transfer fluid of the closed loop is cooled by thermal transfer from the closed loop to the open loop in the heat exchanger
Implementation Method 3
at least one fan generating an air flow of ambient air within the rack
Implementation Method 4
a pump configured for causing the at least one heat transfer fluid to flow in at least one respective liquid channel
Data Source
AI summary
A method for controlling a cooling system of a rack, the rack comprising a heat generating component. The method comprises receiving, by a controller, at least one first temperature indications indicative of temperature variations of at least one heat transfer fluid circulating in at least one respective liquid channel of the cooling system; receiving, by the controller, at least one second temperature indications indicative of a temperature of an air flow of ambient air within the rack, the air flow being generated by at least one fan of the cooling system; and adjusting, based on the at least one first and second temperature indications, a rotational speed of the at least one fan and a rotational speed of at least one pump configured for causing the at least one heat transfer fluid to flow in at least one respective liquid channel.