Mixing Chamber Cooling for Computing Facilities Using Fan-Driven Airflow
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Solution Overview
Problem
Large computing facilities face significant heat management challenges due to high power consumption by computing devices, which traditional cooling systems struggle to address effectively, especially in environments with varying temperatures and humidity levels.
Innovation Solution
A passive cooling system that utilizes external ambient air, driven by the fans of computing devices, to supply cool air and exhaust heated air, with a mixing damper and turbulators to control airflow and temperature, minimizing pressure losses and preventing vortices, and optionally recirculating heated air to adjust temperature and humidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional HVAC systems are used to cool computing facilities, then cooling capacity is provided, but energy consumption increases and system complexity increases
Solution Approach 1:
The computing devices' own fans serve the dual purpose of both cooling the devices and providing airflow for the facility cooling system. The fans draw in ambient air through air inlets, pass it over heat-generating components, and exhaust it through exhaust outlets, thereby self-cooling while driving the facility's air circulation without requiring separate HVAC equipment
Solution Approach 2:
The patent extracts the cooling function from traditional HVAC systems and integrates it directly into the computing devices themselves. Each device becomes its own cooling unit, utilizing its fans to pull ambient air through internal heat exchangers and exhaust it, thereby eliminating the need for centralized cooling infrastructure
2Productivity
If computing devices are densely packed to increase facility capacity, then productivity increases, but heat generation increases making cooling more difficult
Solution Approach 1:
The facility is divided into multiple zones with separate air inlets and exhaust outlets for each zone. Computing devices within each zone independently manage their own airflow and cooling, allowing dense packing while maintaining effective heat dissipation through localized air circulation paths
Solution Approach 2:
Each computing device independently manages its thermal load through its own fans and heat exchangers, allowing dense packing without compromising cooling effectiveness. The system scales linearly with device count as each unit handles its own heat generation
3Temperature
If airflow velocity is increased to improve cooling efficiency, then heat removal improves, but pressure losses increase and vortex formation occurs
Solution Approach 1:
Airflow passages and exhaust outlets are designed with smooth curved transitions rather than sharp angles. The curved geometry guides airflow smoothly from horizontal to vertical directions, reducing turbulence and pressure losses while maintaining high cooling efficiency
Solution Approach 2:
The system optimizes airflow parameters by adjusting velocity profiles and pressure distributions through carefully designed passage geometries. Airflow velocity is maintained at optimal levels for heat transfer while pressure losses are minimized through streamlined path design
4Use of energy by moving object
If ambient air is used for cooling to reduce energy consumption, then cooling cost decreases, but temperature and humidity control becomes difficult
Solution Approach 1:
Different zones within the facility are designed with optimized airflow paths and heat exchanger configurations suited to local ambient conditions. Each zone independently manages its thermal characteristics, allowing effective cooling across varying temperature and humidity conditions without requiring centralized climate control
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 system efficiently cools computing devices by maximizing airflow and minimizing pressure drops, maintaining optimal operating conditions for computing devices while reducing energy consumption and operational stress on fans.
Implementation Method 1
Some, most, or substantially each of the computing devices include a fan that is capable of moving the cool air across one or more heat generating components of the computing device to cool the heat generating components
Implementation Method 2
The heated air flows into the exhaust air space from the computing devices subsequent to cooling the heat generating components
Data Source
AI summary
A system for cooling computing devices within a facility includes an air inlet that delivers cool air to a supply air space within the facility, an exhaust air damper that is configured to exhaust heated air from an exhaust air space within the facility, and computing devices that are arranged within the facility to at least partially partition the supply air space from the exhaust air space. The system also includes an air filter that is configured to filter the cool air and a mixing damper that is positioned within the interior space of the facility and that is operable to control an amount of exhaust air that is mixed with the cool air. The cool air and/or a portion of the exhaust air are used to cool the computing devices and airflow through the system is substantially driven by fans of the computing devices.