Refrigeration Compressors

This first article will examine the evolution of equipment-efficiency standards from full to part load and their relationship to whole-building efficiency. The second article will look at how HVAC technologies are advancing to modulate capacity to match variations in building loads, a major factor in improving whole-building energy performance.

Xcel Energy is headquartered in Minneapolis, Minnesota, and is the largest electrical energy provider in Colorado. The company recently upgraded its refrigerant monitoring systems at its Chilled Water building in downtown Denver, creating an efficient and reliable method for continuous monitoring of refrigerant used in 16 chillers in different locations – while supporting the need for safety, system performance, and reductions in energy and refrigerant costs.
Cooling large buildings typically requires the use of air- or water-cooled chillers that produce chilled water, which then cools the air. About 39% of buildings over 100,000 square feet use chilled-water systems employing various refrigeration compressor designs.
Snail mail. Rolodexes. Boomboxes. We’ve given up the familiarity of the past for the promise of the future. But is the same happening in the chiller industry? Is the push for lower global warming potential (GWP) refrigerants changing the industry as we know it? In some ways, yes. But, in the United States in particular, the change may be more gradual than it appears at first glance.
The second generation Copeland Scroll variable speed ZPV2 compressor features intermediate discharge valves to boost efficiency, optimized scroll elements for variable speed performance, positive displacement oil pump for enhanced reliability in low speed operation and brushless permanent magnet (BPM) motor technology for maximum efficiency.