Electronics Protection - November/December 2011 - (Page 14)

Thermal Emerson Network Power Introduces New RoomBased Data Center Cooling System Emerson Network Power has introduced the Liebert DSE, a room-based precision cooling system. Designed specifically for medium to large data centers, the Liebert DSE is a higher efficiency, down flow-only version of the Liebert DS cooling system that provides a nominal 125 kW of net sensible cooling. With an energyefficient SCOP (seasonal coefficient of performance) rating of 2.9, the Liebert DSE is 52 percent more efficient than the ASHRAE 90.1 (2010) minimum requirement of 1.9 for data center cooling units. It also incorporates an optional new free cooling technology feature, EconoPhase. The Liebert DSE’s integrated free cooling uses the same refrigerant circuit, coils and condenser in both economizer and noneconomizer modes. This air-cooled system employs a two-phase refrigerant versus a traditional single-phase economizer solution, resulting in a simple and efficient cooling system that maximizes the hours available to use reliable free cooling. The Liebert DSE also uses the Liebert condenser platform, the Liebert MC, that features a micro-channel cooling coil design, EC (electronically commutated) axial fans and an ability to communicate with the indoor unit to optimize total system efficiency. The Liebert DSE offers energy savings at both full load and partial load conditions. Along with the EconoPhase economizer, the Liebert DSE incorporates several technologies that improve its overall energy efficiency. These include Copeland tandem digital scroll compressors to optimize part-load energy savings, electronic expansion valves to enable operation at lower condensing temperatures and automatically adjusting, variable speed EC plug fans. Staged evaporator coils also provide greater efficiency by enhancing the ability to enable partial free cooling especially with higher return air temperatures. The Liebert DSE also features the Liebert iCOM control system, which provides diagnostic and maintenance support while optimizing the various modes of operation to save energy. With intelligent control capabilities, data center managers can tune their cooling systems to dynamically adjust airflow patterns by controlling the speed of the EC plug fans to allow cooling unit capacities to adapt quickly to changing IT loads. inches. Unlike ordinary bi-metal thermostats, which are typically capable of handling maximum currents of 2 A/DC or less, SoliStat 2-10 can handle up to 10 A/DC. Designed to operate over the full-automotive temperature range of -40°C to 125°C, SoliStat is a one-piece temperature control product that guarantees reliable, accurate (±1.1°C) setpoints at temperatures below freezing with hysteresis as low as 2.8°C. SoliStat will operate on supply voltages ranging from 6 V DC to 24 VDC, is available with a low-power standby option and carries an IP65 rating. Fujipoly Develops New Low Compression Thermal Gap Filler To help remove performance-killing heat from today’s complex, multi-level printed circuit board designs, Fujipoly has developed Sarcon GR-SL, a low compression and highperformance thermal gap filler material. When placed on top of uneven components, the material conforms to all gaps, peeks and air pockets making a level, large surface area contact point. The high degree of physical contact allows the heat sink to more efficiently remove unwanted heat. As Fujipoly’s softest gap filler pad, this formulation provides a thermal conductivity of 2.7 W/m°K with a thermal resistance between 0.94 and 1.69°Cin2/W depending on sheet thickness. The V-0 tested Sarcon GR-SL is available in 2.5 or 5 mm thick sheets up to a maximum 200 by 300 mm dimension and has an operating temperature of -40°C to 150°C. All American Semiconductor Now Offers S-Force Fan from EBM-Papst New SoliStat Temperature Controller for DC Powered Heating and Cooling Applications engenity, LLC has released the SoliStat 2-10, a compact, onepiece temperature control product for use in direct-current-powered heating and cooling applications. The SoliStat has been developed to address the shortcomings of traditional temperature control solutions in low-voltage, off-grid and mobile applications. SoliStat is an On/Off control that integrates the basic components of a temperature control system (calibrated temperature sensor, microprocessor-based control block and high-current switch) in a single package occupying a volume less than 2.5 cubic 14 All American Semiconductor is distributing the S-Force series of compact fans from EBM-Papst, Inc. The S-Force series is comprised of five smaller series of fans, with sizes ranging from 80 to 172 mm. The S-Force series was designed for cooling all kinds of electronic components quickly, powerfully and efficiently, including cooling server rooms, switch cabinets and sensitive medical technology. The S-Force series reaches nominal speeds up to 14,000 rpm, and operating values that had previously been attained only by larger fans. To equip the housing, stator, bearing system and rotor for high performance, a one-of-a-kind housing design was developed, offering mechanical precision down to the smallest detail. At the heart of the S-Force series are highly compact singlephase and three-phase multipole motors with wear-free electronic commutation. The features include high efficiency with low dissipated energy, maximum efficiency and intelligent function. The new motors attain a peak power of more than 300 watts, equivalent to a 500 percent increase compared to the direct predecessor of the same size. Special impellers, developed just for the S-Force series, have an impeller design that provides pressure build-up in the saddle. The aerodynamic design, coupled with maximum mechanical precision, enables the S-Force fans to have constant low noise. Additional features include speed monitoring, closed loop speed control, operation monitoring, integrated or external temperature sensor, and microprocessor-controlled motor management for softwarecontrolled fan operation. November/December 2011 www.ElectronicsProtectionMagazine.com http://www.ElectronicsProtectionMagazine.com

Table of Contents for the Digital Edition of Electronics Protection - November/December 2011

Raritan Introduces Data Center Rack Controller for Environment and Security Asset Management
Enclosure Design for Extreme Environments
The Power Monitoring Imperative
Protection Selection: Guidelines for Choosing Remote Monitoring Enclosures
Rittal Releases New Hygienic Design Enclosures
Emerson Network Power Introduces Data Center Cooling System
Falcon Electric Adds Lightweight 10-Year Rated Lithium-Ion Batteries to SSG Series UPSs
Crenlo Introduces IBC Kit to its Lineup of Emcor Accessories
Littelfuse Introduces SP1006 TVS Diode Array For ESD Protection in Ultra-Small Form Factors
2012 Electronics Protection Resource Guide
Industry News
Literature
Calendar of Events

Electronics Protection - November/December 2011