Let’s go ahead and move on to talk about eliminating artificial demand with variable speed drives. So what is artificial demand? Typically, it’s when an air system is over-pressurized, and more air is produced at a higher pressure than you actually need to service the demand-needs of your application. So, remember, variable-speed drives only produce as much air as is needed at set pressure, and maintain operating pressure within 1 psi. This allows pressure to be typically set 20% lower versus load-no load driven compressed air systems. Each 2 psi of pressure reduction equals a 1% in cream in energy savings.
The graph to the right compares the pressure profile between a traditional load-no-load air compressor and a variable-speed drive air compressor: The wavy or sinusoidal black line represents the pressure profile of a load-no load air compressor over time, and the straight orange line moving across at set pressure represents the pressure profile of a variable-speed drive air compressor over time. You can see that the load-no-load drive cuts out at a considerably higher pressure than set pressure and the variable-speed drive air compressor maintains a constant set pressure over time.
So, the black-shaded areas signify your potential energy savings. These areas represent the over-pressurization in the system, or in other words, the artificial demand. So remember, N200’s variable-speed drive maintains operating pressure within 1 psi and typically allows pressure to be set 20% lower than traditional load-no-load compressed air systems. If 2 psi of pressure reduction equals a 1% increase in energy savings, eliminating 20% in over-pressurization results in a 10% increase in energy savings. That’s considerable savings right there!
Available Models
Base-Mounted
The Haida N200 is available in only one based-mounted model and two voltages: The N200VSD-46 is 460 Volt and the N200VSD-69 is 575 Volt (3-Phase | 60 Hertz).
Model | Order # | Configuration | Electrical |
N200VSD-46 | S-002203 | Base-Mounted | 460 V |
N200VSD-69 | S-002204 | Base-Mounted | 575 V |