Same great features as the NQ Series with the addition of an optional variable speed compressor for significant energy savings!
Available on 10 and 20 Ton NQ Series.
Why use a NQV Chiller?
A conventional portable chiller uses a compressor running at a continuous speed, also known as a fixed speed compressor. Regardless of the requirements placed on it by the process load, the compressor speed remains at 100%. Fixed speed chillers employ a “hot gas bypass” to maintain the demand on the compressor to avoid wide fluctuations in the coolant temperature delivered to the process for consistent output.
NQV Variable Speed Chillers with advanced PLCs are at the technological forefront of the process cooling industry. The controller constantly monitors the heat load and adjusts the compressor speed for peak efficiency and temperature control and eliminates the need for hot gas bypass. By automatically adjusting the compressor speed, the chiller works only as hard as necessary to provide optimum performance with significantly reduced power use. Studies have shown that a 20% reduction in motor speed can lead to a 51% energy savings.
What kind of energy savings can I expect?
Fixed-Speed vs. Variable-Speed: 10 Ton Chiller
Compared to a typical chiller with a fixed-speed compressor, a chiller with a variable speed compressor provides major power savings at partial loads. For example, at a 30% load, the variable-speed compressor consumes just 36% of full-load power, while the fixed-speed chiller consumes 88% of full-load power – a savings in excess of 50%!
Fixed-Speed vs. Variable-Speed: 20 Ton Chiller
A NQV20 portable chiller combines a 10 ton variable-speed compressor with a 10 ton fixed-speed compressor to generate impressive savings, especially in the 3 to 8 ton range and the 13 to 16 ton range. Note that energy savings are not as significant in the middle load range, where either compressor -- fixed or variable -- would be running near its full capacity of 10 tons. The curve for the 20 ton fixed-speed chiller is a bit different too. It has two 10 ton compressors so that it can run on just one (half power, more or less) until the second compressor needs to kick in. Still, it is clear that there are significant energy savings to be realized.
For more information download our white paper Variable Speed, Portable Chillers are the Way of the Future.