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Method for Optimizing Cooling in a Heterogenous Blade Server Environment by Dynamically Controlling Impedance to Air Flow Through Each Blade Server

IP.com Disclosure Number: IPCOM000189308D
Original Publication Date: 2009-Nov-04
Included in the Prior Art Database: 2009-Nov-04
Document File: 1 page(s) / 140K

Publishing Venue

IBM

Abstract

Disclosed is a system that balances air flow between blade servers in a chassis despite differences in impedance to air flow between the blade servers. Air flow between blade servers varies based on their different impedances to air flow and can be affected by user installed options such as memory, adapter cards, and additional CPUs. However, this can result in one or more blades not getting enough cooling air and others getting too much. By using fans and a control system with feedback, the air flow in each blade server can be optimized for its operating conditions irrespective of each blade's impedance to air flow.

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Method for Optimizing Cooling in a Heterogenous Blade Server Environment by Dynamically Controlling Impedance to Air Flow Through Each Blade Server

This system shown in the figure uses fans (or blowers) in each blade server slot in addition to the chassis cooling fans (or blowers). These blade server slot fans can reside on the blade server itself or in the chassis. Temperature and air flow sensors in each blade server, or at the blade server-to-chassis interface, make constant measurements and provide data to a chassis control circuit. This circuit is under programmable control by the chassis's management system. When an individual blade server's temperature increases for a given chassis air flow, the blade server slot fans can be used to increase the air flow in that specific blade, effectively reducing the impedance to air flow driven by the chassis fan. In cases where a blade's temperature is low; for example, powered off, the blade server slot fans can act to increase the impedance to air flow in that slot which forces more air to flow through the other blade servers installed in the chassis.

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