Passive Bimetal Valve for Processor Cooling Flow Control
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Solution Overview
Problem
In data centers, existing cooling systems face challenges in efficiently managing varying heat output from multiple processors, as they require 'on-demand' cooling that adjusts to instantaneous changes in heat production, often leading to inefficient energy consumption and potential overheating.
Innovation Solution
A Passive Temperature Gate control valve system that automatically regulates the flow of coolant fluid to processors based on their heat output, using a bimetallic valve member that changes shape with temperature to open or close, allowing for real-time adjustment of coolant flow without external power or sensors, ensuring each processor remains within a desired temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional HVAC cooling systems are used to cool data centers, then the processors can be cooled, but the energy consumption increases substantially and the system cannot respond to instantaneous changes in heat output
Solution Approach 1:
The cooling system is segmented into individual control valves for each processor or processor group, allowing independent temperature control. Each valve responds locally to temperature changes at its associated processor, eliminating the need for centralized HVAC systems to cool entire data centers, thereby reducing overall energy consumption while maintaining effective temperature control.
Solution Approach 2:
The control valves incorporate dynamic response mechanisms that automatically adjust coolant flow based on real-time temperature changes. The valves transition between closed and open positions in response to temperature fluctuations, enabling the system to adapt instantly to varying heat output from processors without manual intervention or high energy input.
2Reliability
If coolant flow is increased to meet peak cooling demand, then processors can be cooled during high usage, but energy is wasted when processors are idle and require minimal cooling
Solution Approach 1:
The control valves are self-regulating devices that automatically adjust coolant flow based on processor temperature without external control signals. When processors generate high heat, the valves open to increase cooling; when processors are idle and cool, the valves close to minimize energy consumption. This self-service mechanism ensures reliable cooling during peak demand while eliminating energy waste during low demand periods.
Solution Approach 2:
The system dynamically changes the flow rate parameter of coolant based on processor temperature conditions. During high usage, the valve opens to increase flow rate for adequate cooling. During idle periods, the valve closes to reduce flow rate to minimal levels, optimizing energy consumption while maintaining cooling reliability when needed.
3Temperature
If active control systems with sensors and external power are used, then precise temperature control can be achieved, but device complexity increases
Solution Approach 1:
The control valves are designed as passive devices that self-regulate coolant flow using the thermal energy already present in the coolant. The valve mechanism responds directly to temperature differences without requiring external sensors, power sources, or complex control electronics. This self-service approach achieves effective temperature regulation while maintaining simple device architecture.
Solution Approach 2:
The patent replaces electronic control systems with a purely mechanical thermal response mechanism. The control valve uses the thermal expansion or contraction of its components in response to coolant temperature to automatically adjust flow. This mechanical substitution eliminates sensors, processors, and power requirements while maintaining precise temperature control through physical laws.
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 enables efficient, real-time temperature control of processors, minimizing energy consumption by providing adequate cooling only when needed, thus preventing overheating and optimizing cooling system performance.
Implementation Method 1
A valve member is disposed in the chamber and is responsive to changes in temperature of the coolant fluid within the chamber for effecting movement of the valve member between a closed position and an open position. The valve member is of a material that changes shape in response to the temperature of the coolant fluid within the chamber.
Data Source
AI summary
A system and method for computer data processing systems of cooling or heating a plurality of objects (heat sources), such as processors in a data center or the like, is disclosed with each of the objects having a control valve associated therewith. Each of the objects is in communication with a supply of a coolant fluid and each control valve has an inlet for receiving coolant fluid from its respective object which reflects the temperature of the object. The control valve has a chamber that receives coolant from its inlet and an outlet. A valve member within the chamber is movable in response to changes in temperature of the coolant fluid within the chamber between a closed position and an open position. The valve member is of a layers of dissimilar metal material having different coefficients of thermal expansion that changes shape in response to changes in temperature. The coolant is carbon dioxide (CO2) that is in its supercritical state as it passes through the heat sources.