Overview of Liquid Cooling Systems Peter Rumsey, Rumsey Engineers.

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Presentation transcript:

Overview of Liquid Cooling Systems Peter Rumsey, Rumsey Engineers

Outline What is liquid cooling? Energy Benefits What is water side economizer Combined benefits

Why Liquid Cooling? Heat Capacity of this much air = Heat Capacity of this much water

Fans move energy less efficiently

Liquid Cooling Closer coupling between cooling source and server

Liquid Cooled Racks Racks with integral coils

Yesterday

Today

Comparison of Conventional Cooling to Liquid Cooling – 1,000 kW data center load Cooling Towers and Pumps ChillerChilled Water Pumps FansOtherTotal Power (kW) % SAVINGS Traditional System - 45 Deg F Chilled Water n/a770N/A Liquid Cooled with Fans in the Rack - 55 Deg F Chilled Water n/a64516% Liquid Cooled without fans in the rack - 55 Deg F Chilled Water n/a54529% Liquid Cooled directly couple with CPU - 70 to 80 deg F Chilled Water Room A/C %

Free Cooling Use cooling towers and heat exchanger to produce chilled water Turn off chiller

Three – Well Suited For 24 hr Load

Put in series with chiller free cooling can improve reliability

Free Cooling

Comparison of Conventional Cooling to Liquid Cooling – 1,000 kW data center load With Free Cooling Cooling Towers and Pumps ChillerChilled Water Pumps FansOtherTotal Power % SAVINGS Traditional System - 45 Deg F Chilled Water n/a770N/A Liquid Cooled with Fans in the Rack - 55 Deg F Chilled Water n/a47538% Liquid Cooled without fans in the rack - 55 Deg F Chilled Water n/a37551% Liquid Cooled directly couple with CPU - 70 to 80 deg F Chilled Water Room A/C %

Take Aways Liquid has greater heat removal capacity Pumps are more efficient than fans Coupling heat removal to the source eliminates mixing Commercially available liquid solutions are available Water side free cooling provides cooling with reduced chiller operation for much of the year in California

Thank You