Cold Storage Server Nest with Vertical Air Flow Channels
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Solution Overview
Problem
High storage density servers face cooling issues due to tightly packed disk drives, which limits air movement and increases heating problems, especially in cold storage applications where only a few drives are active at a time, leading to redundant and power-consuming inactive components.
Innovation Solution
A server design with a nested chassis configuration that includes a single controller PCB for multiple bare disk drives, optimized air flow management through channels and cutouts in the nest, and a retaining cover for securement and heat transfer, allowing for efficient natural convection cooling and minimizing the server's size while maintaining high storage density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If disk drives are tightly packed to maximize storage density, then storage capacity is improved, but cooling efficiency deteriorates due to limited air movement space
Solution Approach 1:
The patent introduces vertical air flow channels through the nest structure, transitioning from horizontal air movement to vertical three-dimensional air flow. This allows cooling air to pass through multiple layers of disk drives simultaneously, improving cooling efficiency without requiring increased horizontal spacing between drives.
Solution Approach 2:
The nest structure serves as an intermediary component between the disk drives and the cooling system. It provides integrated cooling channels that directly contact the disk drive surfaces, enabling efficient heat transfer from the drives to the cooling airflow without requiring large gaps between drives.
2Quantity of substance
If disk drives are placed close together to maximize storage capacity, then storage density is improved, but air flow for cooling deteriorates
Solution Approach 1:
The nest is segmented into multiple bays with individual cooling channels for each bay. This segmentation allows air to flow through dedicated channels beneath each disk drive, ensuring that each drive receives sufficient cooling airflow even when tightly packed with other drives in the array.
Solution Approach 2:
The cooling system transitions from two-dimensional horizontal air flow between drives to three-dimensional vertical air flow through the nest structure. Air enters through bottom channels and exits through top channels, creating efficient vertical convection paths that work effectively in densely packed configurations.
3Device complexity
If a single controller PCB is used for multiple bare disk drives, then device complexity is reduced, but heat dissipation becomes more challenging
Solution Approach 1:
Multiple bare disk drives are merged onto a single controller PCB, consolidating what would otherwise be separate drive units. The nest structure provides unified cooling channels that serve all drives simultaneously, and the retaining cover creates an integrated thermal management system that handles heat from all drives through a single cooling pathway.
Solution Approach 2:
The retaining cover acts as an intermediary thermal management component that contacts both the disk drives and the cooling channels. It facilitates heat transfer from the drives to the cooling airflow while maintaining the consolidated configuration of multiple drives on a single controller.
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 solution effectively addresses cooling issues in high-density servers by enhancing air flow and heat dissipation, reducing power consumption, and maintaining high storage capacity within a compact footprint, suitable for cold storage applications.
Implementation Method 1
optimized air flow management through channels and cutouts in the nest, and a retaining cover for securement and heat transfer, allowing for efficient natural convection cooling
Implementation Method 2
Each spacer of the plurality of spacers can be positioned on one of the fasteners of the plurality of fasteners, the spacers maintaining a gap between a top of the single printed circuit board and a bottom of the retaining cover, each spacer being in contact with a disk drive of the plurality of disk drives and the retainer cover so that heat may be transferred from the disk drive to the retainer cover
Data Source
AI summary
A server can be used for a cold storage application. The server can include a nest for holding a high density of bare storage drives. The nest can include a plurality of drive cooling channels residing on the underside of the nest. The server can further include rear, front, and side air flow paths for natural convection cooling.