Compounded Savings In a refrigerated space, some evaporators run 95% of the time (that is 24/7 minus defrost cycles).  Compressors and condensor fans turn on to supply refrigerant to those evaporators when the set points need to be met.  This leaves evaporator motors consuming electricity and generating heat inside a cooled space 95% of the time, while the duty cycle of the compressors may be more like 40-50% of a day.  The combination of solutions below not only reduce evaporator consumption, but also allow the compressor and condensor fans to run less (less heat to pull out of the space due to reduced evaporator motor heat).  These compounded savings add up to be quite significant, but must be engineered and proved to both the utility’s engineering team to offer a custom rebate, and our customers for piece of mind to prove the calculated payback.  We refer to this Efficiency from the motors and Conservation from the controls as compounded savings. Variable Air Volume Controls VAV controls are used to save energy used in industrial refrigerators and freezers. Tests in actual operating refrigerators show that it can save at least 30 percent, and as much as 70 percent of the operating cost of the evaporator fan motors in a typical industrial refrigerator.   The control system functions by sensing the operational status of the cooling system, and controlling the speed of the evaporator fans. It has been determined that the evaporator fan motors contribute a significant amount of heat inside the refrigerated space. By operating the fans at a low speed when no cooling is called for, and at high...