S & L Engineering | Pneumatic Tools Supplier | Pneumatic Equipments Supplier, Australia

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S&L Engineering Compressed Air Cost Saving Estimator

Discover how much your workshop could be saving with an
Inverter Energy Saving Air Compressor.

Number of Compressors

Motor Size

System Pressure bar	Cost Per kWh display in the currency
Usage { Shifts per day days per week weeks per year }

	Estimated Enery Savings p/a = 12,833 kWh
	Estimated Cost Savings p/a = AUD 641.66

Inverter-based compressors reduce energy costs
S & L Engineering (WA) Pty Ltd.

Why save compressed air?
Compressed air is an essential resource: it is often
referred to as the 4th utility after gas, electricity and water.
The common misconception however is that it is free.
Air is free until it is compressed.

	Save 22% On Energy Costs

	Save 50% from Gov Rebate

	Silenced Compressors

	ECO Friendly

There are two main reasons for reducing the amount of compressed air you use:

•	It is expensive
•	To produce it requires a lot of energy (usually electricity) It is assumed by many people that the largest cost is the purchase price of the compressor, then the running costs are mostly maintenance. This is not true – over a 10 year period 72% of the total cost is energy.

How can I calculate how much my compressed air system costs my business each year?

You can obtain the approximate running costs in terms of electricity for a compressor each year using the calculation below:

Size of Motor (kW) x Cost of Electricity Per Unit x Running Hours Per Day x Days x Weeks

Example: A factory runs a 100kW compressor 10 hours a day, 5.5 days a week, all year round. It pays15cents per unit.

Cost = 100 x 0.15 x 10 x 5.5 x 52 = $42,900.00 a year

This figure is only a guideline, since it assumes only fully load running and it does not take in to account the actual motor efficiency.

How installing an MARK inverter – driven compressor can help reduce my energy costs

Installing an inverter - driven screw compressor can assist in achieving reductions in compressed air related energy costs by up to 22%.

Principles

The amount of compressed air needed during a given day or week varies depending on production. Variations in the amount of compressed air required cause corresponding variations in line pressure. Pressure variation is detected by the compressor delivery pressure sensor, which processes the signal and transmits it to the control system. The machine varies motor speed and keeps line pressure constant, adjusting automatically according to consumption. This means it only supplies the amount of compressed air required by the system.

The motor speed is regulated by varying the electric motor feed frequency. Every re-start of the electric motor using the INVERTER is ramped, with limited current. This means an unlimited number of start-ups can be performed, unlike traditional compressors with direct or ASD start-up.

Summary of Advantages
»	Lower Running Cost
	Only uses energy for air production No energy wasted on partial loading

»	Constant Pressure
	Lower energy consumption Higher process stability

»	Lower Maximum Pressure
	Lower energy consumption for lowest maximum pressure Reduced compressed air leaks

»	Constant Power Factor
	High value, even with reduced loads No need for rephasing No penalties imposed by power suppliers

»	Reduced Environmental Footprint

»	Longer Maintenance Intervals

»	Longer Maintenance Intervals

»	Standard Components Reliable standard motors and inverter Customer service available

»	Profitable in the long run

»	Electromagnetic Compatibility

»	Silent Running

»	MARK Guarantee

»	Ramped Motor-Startup
	No current peaks Lower energy consumption Low stress on coupling elements Improved mechanical reliability Unlimited start-ups No penalties imposed by power suppliers

»	Easy Maintenance
	Easy component access Operation parameter monitoring