Avoiding Mis-Information when Assessing the Energy Saving Potential of Motor-Driven Applications in Buildings

11/22/2018
10:30  -  11:00

Theatre :  Facilities, Technology and Innovation 

T4

In theory, undertaking an energy assessment of motor-driven applications should be straightforward. Identify the inefficient pump, fan or compressor, for example. Then by switching control to a variable speed drive (VSD) you can determine the energy, money and carbon saved, along with a payback.

In this presentation, John Guthrie identifies three aspects of an energy assessment, which, if overlooked, can result in increased costs. These relate to the way energy consumption is calculated, the way the cube law is interpreted and wider considerations surrounding the actual installation.

For instance, when calculating how much energy a motor will use, what is often overlooked in that the actual load on the motor is less than its rating because of design oversizing, throttling and head.

The net result is that not only is the existing energy usage overstated but so are the potential savings that can be achieved.

Also when installing a variable speed drive it is important to consider the “big picture”: is there sufficient physical space around the application to install the drive or is a special room or cabinet needed? Is a long cable needed between a motor and a VSD, and if so is it correctly sized and designed for EMC performance?

While the VSD itself will substantially lower your energy bill, it is important to avoid the pitfalls if surprise costs are to be avoided.

Theatre :  Facilities, Technology and Innovation 

Get in touch with us

Any queries? Please send the organiser an email and we'll get back to you, asap.

Sending

©2018 HEELEC Ltd. Treviot House, 186-192 High Road, Ilford, Essex, IG1 1LR | Contact us | Term of use | Privacy policy

Log in with your credentials

Forgot your details?