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Method to determine chassis flow rate based upon component impedance Disclosure Number: IPCOM000210036D
Publication Date: 2011-Aug-22
Document File: 2 page(s) / 24K

Publishing Venue

The Prior Art Database


Disclosed is a method applied to a datacenter environment to predict the airflow of the chassis in based upon the impedances of the subsystem components.

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Method to determine chassis flow rate based upon component impedance

The demands placed upon a datacenter thermal designer are increasing due to the increasing demands of airflow and power delivered to a rack. As the processing throughput of the future servers increase, their need for more power and cooling scale along with them. The result is a large net increase in airflow and temperature control at the datacenter level. Unfortunately, most server hardware gives a range of the actual demands of power (in terms of heat dissipation) and airflow. This is akin to the power name plate associated with equipment. That name plate contains the maximum power that the chassis can draw. It does not describe the typical or actual power consumption. The datacenter designer has no choice but to design to that capacity even though much less is actually used. The same is true for airflow and heat dissipation.

A reliable way to feed the actual, real time airflow usage is desired. The exhaust heat index is a current method used to provide an estimated heat load to the data center. Currently, it uses the rpm of the blower alone to estimate the chassis airflow. Unfortunately, this in no way reflects the actual configuration of the chassis. It is that configuration that dictates the resultant airflow rates. A method that utilizes the chassis configuration as well as the air moving devices is desired to provide actual, real time air flow demands from the chassis.

This disclosure describes a method to use the chassis configuration, Air Moving Devices (AMDs), and temperature differences to predict both the airflow and heat demands of a chassis in real time. This is accomplished by defining the airflow requirements of the chassis subsystems based upon the currently used vital product data (V...