Compact Rack Model for IT Room Airflow Prediction
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Solution Overview
Problem
Current methods for predicting airflow and temperature within IT equipment racks in data centers are either too simplistic and inaccurate or too detailed and computationally expensive, failing to efficiently model pressure-driven leakage flow, internal IT equipment temperatures, and diverse IT populations.
Innovation Solution
A compact rack model idealizing internal-rack airflows as a well-defined flow network, exchanging data with a parent CFD model, which predicts IT-equipment inlet temperatures and handles pressure-driven leakage flow, while maintaining computational efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed CFD modeling is used to predict airflow and temperature within IT equipment racks, then prediction accuracy is improved, but computational cost and solution time increase significantly
Solution Approach 1:
The patent segments the CFD domain by treating the rack interior as a separate zone with its own simplified flow model, exchanging only boundary conditions with the parent CFD model. This segmentation allows detailed external airflow modeling while using a compact internal model, reducing overall computational cost while maintaining prediction accuracy for rack inlet temperatures and airflow patterns.
Solution Approach 2:
The patent changes the modeling parameters by idealizing internal-rack airflows as constrained to a well-defined flow-network topology with predetermined paths, rather than solving full Navier-Stokes equations. This parameter simplification maintains accuracy for practical data center applications while dramatically reducing computational requirements.
2Productivity
If simple black-box models are used for rack airflow prediction, then computational efficiency is improved, but accuracy in handling pressure-driven leakage flow and internal temperatures deteriorates
Solution Approach 1:
The patent introduces an intermediary compact rack model that sits between the simple black-box approach and full CFD. This intermediary model exchanges airflow, pressure, and temperature data with the parent CFD model along the rack periphery, providing accurate prediction of pressure-driven leakage flow and internal IT equipment temperatures while maintaining computational efficiency comparable to simple black-box models.
3Adaptability or versatility
If full CFD modeling is used to capture diverse IT equipment populations and airflow patterns, then model robustness is improved, but solution speed decreases
Solution Approach 1:
The patent segments the modeling approach by treating the rack interior as a separate zone with simplified physics, allowing the parent CFD model to focus on external airflow patterns while the compact model handles internal IT equipment populations and airflow. This segmentation maintains model robustness for diverse applications while improving solution speed by avoiding full CFD resolution of internal rack details.
Data Source
AI summary
A system for determining and displaying in a graphical user interface one or more of air temperature, pressure, or velocity in an information technology (IT) room including an IT equipment rack comprises a processor configured to receive an input comprising airflow resistance parameters through the rack, an IT equipment airflow parameter, a heat-dissipation parameter, an external pressure, and an external temperature, to run the input through a flow-network solver that solves for airflow velocities through at least one face of the rack and a rack air outflow temperature based on the input, provide an output including the airflow velocities and the rack air outflow temperature, and generate, based on the output, a display in a graphical user interface of the system illustrating one or more of air temperatures, air pressures, or airflow velocities within the IT room.