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- 1. Variable Frequency Drives VFD Basics
Editor's Notes
- Energy Usage in modern office buildings The main reason that contractors and building owners install AC inverter drives is to provide an efficient method of controlling the speed of the AC motors on the air conditioning machinery. Reducing the speed of the motor results in a reduction of the flow of air or cooling water and a corresponding reduction in the energy used. AC inverter drives are normally the most efficient means of controlling speed. This control method allows the air conditioning system to be constantly adapted to the demand on the building (number of people working, outside environmental conditions etc.) with the building owner benefiting by way of a lower electricity bill. There have been mechanical methods of adjusting flow rates available for many years. The AC inverter drive, however offers advantages in terms of efficiency and control which will be discussed in this presentation. In a modern building more than 50% of the energy used is consumed by the air conditioning system. The potential for savings is therefore very significant. In many countries government offers incentives to optimize the savings. Consequently new installations are invariably fitted with AC inverter drives.
- 1 Advantages for the : Consultant (offering better solutions to the client) Building Owner (Lower operating costs with higher comfort levels) Panel Builder (reduced labor costs due to simplified fewer components) Commissioning Engineering Contractor (reduced total time and flexibility to compensate for variations in other equipment)