A vast amount of the energy that is lost in a factory or plant is due to wasted energy in an air compressor installation. This can have a huge effect on energy costs, raising your bills and making your cost of ownership high. Various technologies have been developed to ensure that compressed air systems are performing as efficiently as possible, one such technology is variable speed drives (VSD).A thermocompressor is a steam control device that uses high-pressure steam (motive steam) to induce flow from a lower pressure steam source (suction steam) and discharge the mixture at an intermediate pressure. The high pressure is used to create a high velocity jet that mixes with and accelerates the suction steam. The velocity of the mixture is exchanged for increased pressure in the diffuser. A Kadant Johnson thermocompressor is shown above.Evaporative cooling units are also referred to as swamp coolers. They work by blowing warm outdoor air over pads that are soaked in water. The water’s job is to absorb the heat from the air. The water then evaporates and cooler air enters your home while warm air stays out.A fixed speed, also known as non-inverter or standard air conditioner, features a single speed motor operation: on and off. Basically, once it reaches the desired temperature, it turns off, then back on when the temperature rises to a set level. In other words, this standard compressor always runs at full speed or stops completely depending on the temperature requirements.