It comes as a surprise to many that machines driven by electrical motors consume around 66% of all electrical energy used in industry. This gargantuan consumption can be somewhat categorised as shown in the chart below.
Since induction motors typically work for a large number of hours and have relatively long lifetimes, by far the greatest share of their entire life cycle cost is not initial outlay but is instead the energy consumed. Hence, increasing efficiency, even marginally, reduces the environmental impact and directly impacts the life cycle energy costs. In short a higher initial purchase cost of a more efficient motor will, in fact, result in far higher savings with short payback periods.
Given that the cost of energy consumption far outweighs motor purchase price, further significant savings can be realised by retrofitting or replacing inefficient constant duty motors with Variable Frequency Drive (VFD) systems.
A Variable Frequency Drive (VFD) or Inverter is a device that controls the rotational speed of motor driven equipment. They efficiently meet varying load requirement by adjusting the frequency and Voltage of the power supplied to an AC motor. This allows operation over a wide speed and load range, significantly reducing expensive energy consumption.
For pumps with no static lift the air or fluid flow varies directly with the fan or pump speed. As the input power varies to the third power of the speed small decreases in equipment rotational velocity result in massive reductions in energy consumption.
Energy reduction is typically in the region of
30%-70% resulting in massive cost savings and subsequent investment return.
As Siemen Solution Partners Finesse can offer access to Siemens Financial Services (SFS). Siemens recognises sustainability as a critical issue for businesses globally, both large and small and is dedicated to enabling sustainability gains. As an expert in energy efficiency and renewable energy funding, SFS joined forces with the Carbon Trust in 2011 to create the Energy Efficiency Financing scheme (EEF) - designed to help industry facilitate investment in new technology in an easy, affordable and flexible way.
Energy Efficiency Financing is available for a wide variety of projects (assuming they meet Carbon Trust Implementation Services’ energy saving assessment criteria). Projects that may qualify include building technologies, such as pipe insulation and air conditioning, or industrial process technologies, including compressed air, refrigeration or specialist production equipment. Energy Efficiency Financing may also be used to fund combined projects, such as replacing heating and lighting.
Investing in energy efficient equipment makes sound business and environmental sense. And now with the affordable and flexible Energy Efficiency Financing scheme brought to you by Carbon Trust Implementation Services and Siemens Financial Services, reducing energy costs has never been easier!
but this is strictly on a case by case basis.
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