CRAC Fan Speed Control via Wireless Sensor Feedback
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Solution Overview
Problem
Conventional data centers face significant energy inefficiencies due to the excessive use of cooling air or liquid to maintain environmental conditions, often cooling the entire room for individual computing devices, leading to unnecessary energy expenditure.
Innovation Solution
An adaptive method and apparatus for controlling Computer Room Air Conditioning (CRAC) units using a wireless mesh network of sensors to monitor and manage cooling air or liquid volume and temperature distribution, allowing for precise control and optimization of cooling resources based on real-time environmental conditions and device-specific needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional CRAC units cool the entire room to meet environmental requirements for individual computing devices, then the environmental conditions for computing devices are maintained, but significant energy is wasted cooling areas that do not require such cooling
Solution Approach 1:
The patent segments the data center cooling into localized zones around individual computing devices rather than cooling the entire room. Sensors are placed near each device to detect thermal conditions, and CRAC units are controlled to provide targeted cooling only where needed, dividing the cooling function into discrete device-specific segments.
Solution Approach 2:
The patent implements local quality by providing different cooling conditions to different locations based on actual thermal needs. Each computing device receives customized cooling based on its specific heat generation and environmental conditions, rather than applying uniform cooling across the entire room. This allows critical areas to be cooled while non-critical areas remain warmer.
2Reliability
If CRAC units push too much cooling air at very low temperature, then computing devices are cooled, but significant and unnecessary energy costs are incurred
Solution Approach 1:
The patent applies dynamics by making CRAC unit operation adaptive and responsive to real-time conditions. Sensors continuously monitor thermal conditions near computing devices, and CRAC units dynamically adjust their cooling output based on actual needs rather than operating at fixed high capacity. This allows the system to scale cooling provision to match actual thermal demands.
Solution Approach 2:
The patent implements feedback mechanisms where sensors detect thermal conditions and communicate this information to control CRAC unit operation. The system uses feedback from temperature sensors to adjust cooling intensity, ensuring that cooling is provided only to the extent necessary to maintain safe operating conditions, thereby eliminating energy waste from excessive cooling.
3Use of energy by moving object
If wireless sensor networks and adaptive control systems are implemented to enable precise cooling control, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by using multi-functional wireless sensor nodes that perform multiple tasks: detecting thermal conditions, communicating with CRAC units, and potentially monitoring other environmental parameters. This consolidates multiple functions into single components, reducing overall system complexity while maintaining precise control capabilities.
Data Source
AI summary
Various embodiments provide an apparatus and method for controlling computer room air conditioning units (CRACs) in data centers. An example embodiment includes: receiving an alert message from a reporting wireless network sensor of a plurality of wireless network sensors via a wireless sensor network, the alert message including information indicative of a modification needed to an environmental condition, the alert message including an indication of stability or instability of a computer room air conditioning unit (CRAC) in a data center; and using the information indicative of a modification needed to an environmental condition at a networked controller to command a device capable of modifying the environmental condition to modify the environmental condition in a manner corresponding to the information in the alert message, commanding the device including controlling fan speed in the CRAC to correct an indication of instability.