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Reduce the chiller's energy usage up tp 30 percent by adding a VFD, says McQuay |
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Monday, 22 January 2007 |
 A centrifugal chiller is typically the single largest consumer of energy in a building, says McQuay. But it's possible to reduce the chiller’s energy usage by installing a solid state variable frequency drive (VFD). Coupled with the latest MicroTech II unit controller, a VFD allows the centrifugal chiller to achieve the most efficient part load performance possible by accurately matching the chiller’s motor performance to the actual cooling load requirement.
Since most chillers operate at part load 99% of the time, the energy savings with a VFD can be significant, up to 30% annually. Additionally, a VFD may qualify for local utility rebates for even more savings.
The “soft start” provided by a VFD results in less stress on compressor motor, gears and electrical components than a traditional Wye-Delta or solid state motor starter. Superior protection of the compressor motor can result in improved reliability and longer equipment life.
McQuay Factory Service can provide a complete evaluation of a centrifugal chiller, including estimated energy savings. "We can provide expert engineering and turnkey installation to help the VFD retrofit go smoothly and quickly", affirms the company in the product's brochure. |
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