Efficient energy appraisal lowers electricity costs and reduces emissions

2012-12-13 - Electric motors are essential to many industrial processes. On average these motors account for two thirds of any industrial facility’s total electricity consumption, but several measures can be taken to reduce both that proportion and the total cost of ownership. One way to lower energy costs is to participate in an efficient energy appraisal.

Energy efficiency is one of ABB’s long-time priorities. A special area of interest is electric motors in variable torque applications, such as centrifugal fans and pumps. They are often found in industrial processes where the flow of air or fluid has been traditionally regulated with some kind of mechanical device, which results in unnecessary losses.

A more efficient solution is to use a drive to adapt the speed of an electric motor connected to a fan or pump to obtain the required flow. This can reduce electricity consumption by up to 70 percent.

Additionally, new legislation setting minimum efficiency performance standards (MEPS) for electric motors is being introduced in many countries. These standards cover a wide range of low voltage electric motors in the EU, USA and Australia, for example.

The aim of the MEPS is to legislate efficient electric energy use by devices, thereby lowering those devices’ carbon footprint. This concept is also included in an energy appraisal, where CO2 emissions are part of the analysis. And just like the MEPS, CO2 emissions must be considered from a local perspective.

Local conditions also influence how the energy appraisals are organized. In a large industrial country like Germany, for example, the energy appraisal can be executed by one of ABB’s many partners. In countries with a smaller industrial base, such as Malaysia and Singapore, ABB will use its own appraisal teams.

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