David A. Moore

Characterization of fiber accumulation fouling in fine pitched heat sinks

Fiber accumulation fouling of heat sinks is a growing issue within the electronics industry. Fouling can lead to significant decreases in cooling efficiency and may even cause equipment malfunction. Most existing dust studies focus on fine particle threats to human health or heavy machinery. Little attention is paid to the larger particles and fibers that human anatomy and heavy equipment typically filter out before they reach susceptible areas. This approach ignores many threats to electronic equipment. This paper characterizes examples of Fiber Accumulation Fouling from several sources

Hybrid warm water cooled supercomputing system

The National Renewable Energy Laboratory (NREL) has implemented a state-of-the-art facility which tightly integrates campus and datacenter thermal management and allows for a chiller-less system with substantially lower capital and operating expenses than a traditional data center. To further lower these expenses, NREL recovers waste heat for use in climate control of offices and laboratories co-located with its data center. The NREL data center houses a liquid cooled High Performance Computing (HPC) system and supporting air cooled computing equipment collectively known as Peregrine. The energy efficiency of NRELs facility is explored using data acquired during facility operation. The facility achieved an average Power Usage Effectiveness (PUE) of 1.05 over the most recent year of operation. During the study, Peregrine had a peak power consumption of approximately 900kW, while the combination of the cooling towers, pumps, and lighting/plug loads consumed an average of 25.3 kW. Since the start of operations, NREL estimates that it saves approximately

CWDM transceiver for mid-board optics

200,000 per year through the recovery of datacenter waste heat. The availability of recovered heat allowed NREL to delay startup of the campus heating boiler by approximately one month during the autumn of 2015.

Docking station with auxiliary heat dissipation system for a docked portable computer

The need for additional IO bandwidth for data center device interconnection is well established. Optical interconnects can deliver required bandwidth along with energy and space efficiency at a cost that encourages adoption. To this end, we are developing an optical transceiver incorporating multimode VCSEL emitters in a coarse wavelength division multiplex (CWDM) system capable of transmission at 25Gbps per channel, 100Gbps/fiber, and a maximum aggregate bidirectional data rate of 1.2Tbps. Electrical connection to the transceiver can be made by solder reflow or LGA connector, and optical connection is made by means of a custom optical connector supporting CWDM transmission.