Nowadays, systems are designed to meet some strict indoor and environmental conditions and according to the requirements of the user. This has led to the development of some more energy-efficient devices on the HVAC systems. Some key components have been incorporated into the system to improve its efficiency. The advancements are also as a result of improved technology. To learn more about Variable Frequency Drives, click here . By using computer-aided-designing tools, developers have also been able to come up with HVAC systems that are have enhanced performance and higher efficiency. There are some advancements that have helped improve the efficiency of the system and some of them include; use of high-efficiency boiler control systems, application of direct current control systems, use of energy-efficient motors, development of low kW/ton chillers and matching of variable frequency drives to fans, pumps, and chiller motors. But let us take a look at HVAC variable frequency drives. Variable frequency drives help in saving energy by varying the frequency and voltage of the motor electrical supply.

This variation is made to lower the operating speed of the equipment that it controls and so that they can match the requirements of the load. The power that is drawn from the drive drops rapidly due to the reduced operating speeds. To have a better understanding of this, we can take a centrifugal fan that operates at 75% flow and draws only 40% of full-load power. When the flow is at 50%, the fan will require power at a reduced rate of 15% of full-load power.To learn more about Variable Frequency Drives, visit this product. Vanes control and dampers are some other forms of conventional control systems that reduced the energy requirements at a partial flow but they have very insignificant savings. The variable frequency drives have also played a very important role in improving efficiencies of HVAC systems on the centrifugal pumps that are located on chilled water and hot circulation systems. The pumps are usually giving a continuous supply of water to the terminal units. With time, the demand for heating and cooling water will decrease and the control valves at the terminal units will throttle back. It is therefore very necessary to maintain the pressure of the system. This can be achieved by installing a by-pass valve that will open between the supply and the return system. The pump electric drive will tend to remain constant by keeping the rate of floe nearly constant. The drive simply works by regulating the pressure in the system to counter the varying demands by slowing the pump. Learn more from https://en.wikipedia.org/wiki/Variable-frequency_drive.