TecKNow of the Day
Most fixed-speed compressors in traditional HVAC systems only operate at 0% and 100%; in other words, fixed-speed compressors are either off or on, wasting energy when partial-load conditions prevail. And even if you have a traditional system with 2 or 3 stages, it doesn’t compare to the full-range variable capacity of the inverter-driven system that fully supports part-load operation.
In comparison, INVERTER compressors ramp up quickly, providing the energy necessary to achieve the cooling or heating demand of the zone. Then, working in tandem with system controls and sensors, the INVERTER compressor varies its speed to maintain the desired comfort level. Thus, the system performs at only the minimum energy levels necessary and does not waste electricity when partial-load conditions are present, which is 97% of the time in most locations.
The industry is beginning to recognize part-load operations-part-load systems are now being rated with a new procedure yielding an Integrated Energy Efficiency Ration (IEER) rating. This is a great improvement over the IPLV (Integrated Part Load Value) method. To obtain IEER ratings, the systems are tested at four different capacity levels and outdoor temperature conditions to provide a very accurate part-load measure. IEER will be the gold standard for part-load systems in the near future, and VRF systems, with the INVERTER technology, are designed to be among the best.