Energy Efficiency Audit of Electrical System

Name: Energy Efficiency Audit of Electrical System
Rating: 4.5 (64 reviews)

Electric Motors and Drives Applications (Pump&Fan)

Created byElectric Drives Academy

Last updated 9/2024

English

English [Auto],

What you'll learn

In which ways it is possible to significantly reduce electricity consumption in industrial and commercial facilities?
How to perform analysis of energy efficiency of electric motors?
When to propose investment in high-efficiency motors and how to calculate investment pay-off time?
How to save electricity consumed by electric motors in hydraulic and ventillation systems?
Which free web tools can you use for calculating of electricity savings obtained by electric drives, and how to use these tools?

Course content

3 sections • 16 lectures • 1h 50m total length

Efficiency of Electric Motors7:06
Describe how electric motors convert electrical to mechanical power, the losses causing lower output, and IEC four induction motor efficiency classes I1 to I4 and related minimum energy performance standards.
Why is Motor Efficiency important?4:17
Explore why motor efficiency matters and how electric motors drive a large share of global electricity use. Total cost of ownership favors efficient motors by reducing electricity use and downtime.
How to determine the efficiency of Electric Motor?5:51
Determine motor efficiency from nameplate or data sheet, classify by efficiency class (i1–i4, premium i3), and calculate efficiency from apparent power, input power, and output power.
Change of efficiency due to motor load change7:38
Examine how motor efficiency varies with load, using linear estimates between 50–75% and 75–100% of nominal load to assess energy use for induction, synchronous, and CRM motors.
Calculation of electricity savings of high-efficiency motors - example 18:53
Calculate electricity savings for high-efficiency motors powering a 55 kW centrifugal pump, comparing i2, i3, and i4 to show i3 delivers the best payback.
Calculation of electricity savings of high-efficiency motors - example 27:56
Replacement of a low-efficiency motor - example 36:10
Compare a 110 kW old motor with a high-efficiency I3 replacement, calculating load-based efficiencies and energy losses to show about €3,500 yearly savings and payback under 2.5 years.
General tips on performing energy audit on electric motors5:17
Conduct an energy audit of electric motors by gathering base data and nameplates, prioritizing high power and aged motors for savings. Calculate savings and payback, then present options and report.

Introduction to hydraulic systems7:47
Explore how hydraulic systems transfer liquid using pumps, pipes, and reservoirs, and how motor speed control via frequency converters enables energy savings by adjusting head and flow.
Traditional flow control methods7:41
Explore traditional flow control methods for hydraulic systems, including throttle control, bypass control, on/off control, and motor speed control, and assess their energy efficiency implications.
Use of frequency converter for flow control in hydraulic system6:02
Use a frequency converter to control pump motor speed and thereby adjust flow and head in a hydraulic system, achieving energy savings through efficiency improvements.
ABB EnergySave Calculator - pump applications7:44
Utilize the ABB EnergySave calculator to quantify energy savings from frequency converters in pump applications by inputting pump data, control methods, and motor details.
Example - calculation of savings in pumping system11:19
Evaluate energy savings for a centrifugal pump by switching from on/off control to motor speed control with a frequency converter. The example shows savings and a rapid return on investment.

Introduction to fans and ventillation systems4:38
Learn how fans generate pressure to move air through ducts, facing frictional losses, and how centrifugal and axial fan curves interact with the system curve to determine the operating point.
Flow control in fans and ventillation systems6:09
Use dampers or motor speed control to manage ventilation flow and pressure, then apply affinity laws to relate speed, flow, and power for energy savings.
ABB EnergySave Calculator - fan applications5:49
Use the ABB Energy Save calculator for fan applications to quantify energy savings, investment payback, and CO2 reductions when powering motors through a frequency converter.

Requirements

Understanding of basic electrical quantities (electric power, energy, current,...)

Description

Energy Efficiency Analysis is a highly-demanded and valued skill nowadays and the goal of this course is to provide you with necessary knowledge and confidence to perform this analysis on your own. You will be equipped with skills to perform needed calculations and to use available web tools to help you with your analysis.

In this course, you will learn how to identify electrical energy savings possibilities in an industrial and commercial facilities, in which ways the efficiency can be improved, how to select the right equipment for efficiency improvement and how to calculate the electricity bill savings. Finally, you will be able to determine the pay-off time for the investment you have proposed.

The focus of the energy audit of electrical system is on electric motors and electric motor driven systems such as hydraulic (pump) and ventilation (fan) systems. These systems have been chosen for the analysis due to their dominant influence on overall electricity consumption and biggest energy saving potential.

You will learn to make investment proposals and to calculate pay-off time of high-efficiency motors and frequency converters in pump and fan applications. Special attention is given to pump and fan application due to their wide presence and big electricity saving potential. This course contains tutorial on free online tool that can be used in practice to perform calculation and to generate report on electricity savings in pump and fan applications.

By the end of this course, you will be equipped with practical skills needed to evaluate and improve energy efficiency of Electric Motors and Drive Systems, perform needed calculations of saved kWh, propose investment into improving energy efficiency, as well as to provide the information about investment pay-off time.

Target audience for this course are Engineers, Technicians and other Professionals in the fields of Electrical Engineering, Energy Management and Industrial Operations, as well as anyone else interested in this subject.

Who this course is for:

Energy efficiency consultants
Energy auditors
Electrical engineers working with electric drives
Maintenance engineers
Engineering students interested in energy efficiency

Energy Efficiency Audit of Electrical System

What you'll learn

Explore related topics

Course content

Analysis of electric motor efficiency8 lectures • 53min

Savings in pump applications5 lectures • 41min

Savings in fan applications3 lectures • 17min

Requirements

Description

Who this course is for: