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.
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.
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.
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.
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.
Check out Engineered Systems magazine’s November 2019 issue continues the discussion of condensation on active chilled beams, examines the dynamic cooling solutions required in data center applications, the implications of USP 800 on pharmaceutical comfort, and much more.