Control of Server Inlet Temperatures in Datacenters - A Long Overdue Strategy
One of the most critical parameters in the operation of a data center is the inlet temperature of the servers. The ability to control these temperatures is essential for the effective performance of any data center. In this paper we demonstrate why control is important, how it can be achieved, and also present a comparison of the currently available data center cooling technologies, along with an assessment of their control capabilities. We will also show how the Kool-ITTM technology provides superior control over more conventional approaches, and allows data centers to perform more efficiently, reliably, and effectively. We will further demonstrate that the Kool-ITTM technology more than pays for itself in both short-term and long-term benefits. Details on efficiency, return on investment (ROI), power density and enhanced server life and performance will also be provided and discussed.
AFCO Systems

Ducted Exhaust Cabinet ~ Managing Exhaust Airflow Beyond Hot Aisle/Cold Aisle
Rack-mount computer and data storage equipment generates heat during normal operation. When equipment is enclosed in cabinets, heat generated by the equipment can concentrate within the cabinet and cause equipment to overheat and shut down. Contemporary thinking in data center thermal management promotes a Hot Aisle / Cold Aisle approach to segregate cold air in front of rows of equipment cabinets and hot exhaust air behind these rows of cabinets. This approach works well in low to medium density data center applications. Unfortunately, though, the Hot Aisle / Cold Aisle approach does not perform well in many medium density applications and can not begin to support high density applications without extreme discipline and additional air flow management devices outside of the cabinets to prevent hot exhaust recirculation into the cold aisle.
Chatsworth Products, Inc.

Supporting Cisco Switches In Hot Aisle/Cold Aisle Data Centers
The installation of Cisco switches inside equipment cabinets in the data center is a growing trend. Critical to supporting this trend is the need to address the right-to-left airflow pattern of Cisco 6500 and 9500 switches. Specific steps must be taken to prevent internal re-circulation and the hot exhaust from one switch raising the intake temperature of an adjacent switch. It is also highly desirable to place this equipment in a hot aisle/cold
aisle layout without disrupting the data center’s planned airflow pattern. These and other issues are addressed.
Chatsworth Products, Inc.

Cooligy Active Micro-Structure Liquid Cooling System for Gamer PC Applications
Recent technical advances in graphics processing units have accelerated the proliferation of high power GPUs and multiple GPUs in high-end gamer PC applications. Characterized by very high heat loads, this application is causing increasing numbers of OEMs to investigate alternative methods, such as liquid cooling, to achieve the level of thermal management needed for dramatically higher system power levels. Typical gamer PC platforms employ a dual-card configuration to support the operational requirements of extreme graphics computing. In this application, the power required by the GPU often exceeds that of the CPU itself, a trend that processor roadmaps predict will continue for the foreseeable future.
Cooligy, a Division of Emerson Network Power

The Thermal Management Imperative in Avionics and Defense Electronics
The days of testing thermal performance with duct tape and cardboard mockups are winding down. Modern electronic systems cannot be handled on the back of an envelope, and the required pace of innovation is just too fast. The most successful avionics and defense electronics companies are making thermal management expertise part of their DNA. New technologies like upfront CFD software are making it possible for today’s multi-tasking engineers to effectively deliver thermal management expertise early in the design process long before physical prototyping and testing.
CFdesign, a Division of Blue Ridge Numerics, Inc.

All-Passive, All-Analog, Electrically-Adjustable Resistor Tempco for Post-Package Temperature-Conditioning
Analog System Designers at the Mercy of Temperature Problems: Temperature dependencies of
components have been the bane of the analog designer for decades. Even with extreme care in using the
best analog design practices, the design typically doesn’t succeed unless considerable thought is devoted,
“early and often”, to how the accumulated tolerances, mismatches and variances will be fixed (trimmed) at the
end. Resistance trimming (using other approaches such as lasers, fuses, analog potentiometers, etc) allows
the engineer to directly2 trim only room-temperature variances and mismatches in currents and voltages.
Microbridge Technologies Canada, Inc.