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S and L Engineering (WA) is offering a compressed-air system review service, including advice and recommendations for improving energy efficiency.

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, this can increase the pressure drop across the distribution system.

Many businesses neglect to check for leaks as part of maintenance programmes.

The typical leak rate on a site can be up to 40 per cent.

Artificial demand is created when air pressure that is supplied for an end use is higher than that required for the application.

The use of pressure regulators at the end use reduces artificial demand and saves energy.

Compressed-air installations are often left on overnight, even when there is no production.

This is 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 substantial amounts of money.

S and L Engineering can provide compressed-air services from maintenance programmes and reviews of existing systems through to the design and supply of new installations.

S and L Engineering

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