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Items Tagged with 'standards'

ARTICLES

Standby Power: Behind The 10-Second Start

The what and why of applying NFPA 110 Type 10 and NFPA 70 starting requirements to standby power system applications.
The ability of engine-powered generators to start and supply standby power of acceptable frequency and voltage within 10 seconds of a utility outage has made these generators the standby power system of choice for a wide variety of facilities including mission critical.
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Impeller: Ziehl-Abegg

Ziehl-Abegg has introduced its new ZAvblue impeller, which the company claims is up to 20% more efficient than other standard products. The company also says the bionic design of the new impeller requires significantly less space in the customer device. Equipment designers can now generate the current airflow with impellers that are one size smaller.


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Chillers: Johnson Controls

Johnson Controls has introduced the Quantech Air-Cooled Chillers. The company says the chillers offer up to 50% annual energy cost savings compared with the replaced chillers, have a low lifecycle cost, meet or exceed ASHRAE standards, and help earn LEED credit with a low refrigerant charge. Three models make up the Quantech chiller line. The QTC2 (15-50 tons) provides chilled water for all air conditioning applications using central station air handling or terminal units. The state-of-the-art installation uses tube and fin condensers, brazed plate evaporators, and scroll compressors.


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Editor's Note

From Awards To Pink Slips

Some late notes of interest from the inbox run the gamut of outcomes.
As we were putting this issue together, I got a follow-up email from Joseph Dussault, who co-wrote the feature about the big ventilation/ductwork retrofit at Yawkey Boston Medical Center.
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Packaged Unit: Johnson Controls

Johnson Controls introduced the Luxaire® Ovation™ Ultra High Efficiency Packaged Unit. The combination of the unit’s two-stage compressor, VFD, high-efficiency indoor/outdoor coil, and premium-efficiency indoor/outdoor motor, delivers up to 18.1 SEER and 14.35 EER.


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Calculated With Care: Ventilation in Health Care Systems

A Mississippi clinic needed above-average design on a budget. The equipment was nothing unusual. However, creativity and attention to detail uncovered opportunities to fine-tune the design and exceed ventilation benchmarks for less.
Engineers’ daily challenges include calculations for outside air, supply air, and return or exhaust air flows — all while balancing mandated code requirements with owners’ expectations for performance, equipment first-cost, and future energy costs.
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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
5/13/15 11:00 am EDT

When's & Why's of Fuel Options and Selection for Backup Power

ON DEMAND This presentation will bring listeners up to speed on what the best options are today and in the near future. 

Engineered Systems Magazine

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2015 May

Check out the May issue of ES with the cover story: VRF with Heat Recovery Ventilation In PreK-12 Schools.

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