Improving energy efficiency for air compressors
A
SandL Engineering product story
Edited by the Engineeringtalk editorial team
Aug 4, 2009
S and L Engineering can provide large or small businesses with a comprehensive review of their compressed-air systems and offers advice and recommendations for improving energy efficiency.
According to the company, regular scheduled maintenance is essential for reliable production and reduction in energy wastage.
For example, if a filter is clogged, extra power is needed to overcome the obstruction, so the generating pressure is increased if a condensation drain is not operating properly and this can increase the pressure drop across the distribution system.
More energy is needed and costs increase.
In addition, S and L claims that many businesses do not include checking for leaks in their system as part of their maintenance programme.
The typical leak rate on a site can be up to 40 per cent, which equates to a lot of compressed air and costs wasted.
Artificial demand is created when an end use is supplied air pressure higher than required for the application.
The company recommends using pressure regulators at the end use to reduce artificial demand and save energy.
Compressed-air installations are often left on overnight, even when there is no production.
This is very wasteful, because power is being used to feed leaks.
Even when compressors are idling, they can still draw 40 per cent of their full load current.
Compressors switch on and off as the pressure demand varies.
This cycling is very wasteful in terms of energy.
Installing timers and control systems, including inverter-driven screw compressors, can minimise or eliminate on-load and off-load patterns and save money.
S and L offers energy-efficient solutions for compressed-air requirements, from maintenance programmes and reviews of existing systems, through to the design and supply of new installations.
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