Motorized Cover Sheet for Immersion Cooling Tank Vapor Control
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Solution Overview
Problem
Current immersion cooling systems face challenges in minimizing heat transfer fluid vapor loss during maintenance, particularly in sealed or semi-open baths, leading to inefficiencies and downtime, as existing methods either result in vapor escape or require shutting down equipment, which are undesirable for high-speed data centers.
Innovation Solution
A system comprising a condensing device with a crane mechanism and retractable cover sheet assembly that allows for hot swapping of electronic equipment by condensing vapor externally and minimizing the tank opening area, using a motorized cover sheet to reduce vapor loss and maintain operation continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the immersion cooling tank is hermetically sealed to prevent vapor loss, then heat transfer fluid vapor loss is minimized, but access to electronic equipment for maintenance is restricted
Solution Approach 1:
The tank lid is segmented into a fixed portion and a movable portion that can be independently operated. The movable portion can be opened to provide access to electronic equipment while the fixed portion remains sealed to prevent vapor loss. This segmentation allows selective opening of only the necessary section for maintenance.
Solution Approach 2:
A condensing device is extracted and positioned outside the tank, connected to the interior through a vapor conduit. This external condensing system captures vapor that escapes during maintenance operations, condenses it, and returns it to the tank, thereby addressing vapor loss without requiring complete sealing of the tank during equipment access.
2Ease of operation
If the tank is opened for equipment maintenance, then access to electronic equipment is enabled, but heat transfer fluid vapor escapes into the environment
Solution Approach 1:
A vapor conduit acts as an intermediary between the tank interior and the external condensing device. This conduit provides a controlled pathway for vapor to be captured and condensed externally, mediating between the need for tank opening (for maintenance access) and the need to prevent vapor escape (environmental protection and fluid conservation).
Solution Approach 2:
The system recovers heat transfer fluid vapor that would otherwise be discarded into the environment. The condensing device captures escaped vapor, condenses it back to liquid form, and returns it to the tank, thereby recovering the lost substance and reducing the need for frequent fluid replenishment.
3Loss of substance
If equipment is shut down to prevent vapor generation, then vapor loss is minimized, but productivity and operational continuity are reduced
Solution Approach 1:
The system enables continuous operation of electronic equipment while implementing vapor recovery. Equipment remains powered on and operational, generating heat and vapor, but the condensing device continuously captures and recycles the vapor. This maintains productivity while minimizing net vapor loss to the environment.
4Ease of operation
If a semi-open bath is used to enable hot swapping, then equipment maintenance is facilitated, but large amounts of dielectric vapor are released
Solution Approach 1:
The vapor conduit serves as an intermediary that connects the semi-open tank configuration to an external condensing system. This allows the tank to remain semi-open for hot swapping operations while the conduit captures dielectric vapor at its source and directs it to the condensing device, preventing large amounts of vapor from being released into the environment.
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 effectively minimizes dielectric vapor loss and allows for continuous operation during equipment maintenance, reducing downtime and increasing data center throughput by condensing vapor externally and using a motorized cover sheet to control the tank opening size.
Implementation Method 1
heat transfer fluid vapor produced in the immersion cooling tank, upon contact with an exterior surface of a condensing device, condenses
Implementation Method 2
condensing coils through which a cooling fluid flows at a prescribed flow rate and temperature
Implementation Method 3
The diffusion loss of vapor is proportional to the area of opening and the period of time the opening is exposed
Data Source
AI summary
A device for and method of hot swapping one or more electronic devices from an immersion cooling tank having a first opening, the device including a condensing unit removably locatable in first opening of the immersion cooling tank, the condensing device having a condensing coil forming a second opening through which the electronic device(s) is removable. A retractable cover sheet assembly, under computer control, is positioned to form a sized opening, which may include a containment structure, prior to opening the tank lid to minimize dielectric fluid loss.