FS-Elliott Co. recently launched their Polaris+ series. Building on the design of FS-Elliott’s original industrial compressors, the Polaris+ line incorporates several new product advancements aimed to increase reliability and efficiency while maintaining low cost of ownership. The new Polaris+ series consists of five models with flows ranging from 900 to 11,500 icfm, 250 to 3000 hp, and pressures up to 150 psig.
Desert Aire has unveiled its new Q-Pump Inverter + that uses a variable speed driven compressor. The Q-Pump Inverter + is incorporated into DOAS that are being installed on a geothermal, hybrid or tower/boiler loop, and delivers conditioned air to a building optimizing the performance of its heating and cooling systems. The Q-Pump Inverter + replaces Desert Aire’s Q-Pump.
FS-Elliott Co., LLC has released the R1000, the newest addition to the Regulus® control system line. The R1000 introduces new features that together enable plant operators to deal with energy costs. The control system features Ambient Compensation Control, a local control mode designed to automatically adjust the compressor set point based on changes in ambient conditions.
Lennox has expanded its light commercial Raider® rooftop unit line to include new 7.5- to 12.5-ton models, adding to its existing offering of 3- to 5-ton units. Designed for compatibility with many replacement installations, Raider units are built to fit the most curb sizes virtually eliminating the need for an adaptor curb on many replacement jobs. Available in gas/electric and electric/electric models, 3- to 12.5-ton units offer efficiency levels of up to 13 SEER, 11.5 EER, and 13.2 IEER.
Bitzer is now offering a range of compressor units for use with the natural refrigerant ammonia (R717). The Bitzer ammonia compressor packs (ACP) are available with a capacity range of 100 to 450 TR. The modular compressor units comprise up to three compressors. For higher capacities, as many as three compressor packs can be connected (up to 9 compressors) and connected to a single controller, increasing the overall capacity up to 1,200 TR. The company says this is ideal for industrial systems.
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.
Bitzer’s Oribt 6 Series Scroll Compressors for R410A are based on the design of the company’s Orbit 8 Series Scrolls. The 6 Series is designed for applications ranging from 10-20 HP, and according to Bitzer officials offers market leading energy efficiency and the lowest sound levels in their class by 2 – 4 dB(A).
Danfoss will extend its inverter scroll compressor range VZH to include three new models. According to the company, the variable speed VZH compressors provide efficiency at part-load conditions, and can improve efficiency by more than 30% compared to fixed-speed compressors.
Bosch Thermotechnology has launched its new LM Series water-to-water (W2W) heat pump line for new commercial and retrofit applications. The LM Series includes five models from 2 to 6 tons. They can be used in horizontal and vertical configurations depending on the application, and feature a two-speed scroll compressor and a commutated motor as standard components for efficiency and comfort. They achieve up to 32 EER part load and up to 22 EER full load.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.