1. 8 December 2018
How are engineering companies addressing the issue of energy efficiency?

2. When is 'energy efficiency' important?
12/8/2018
Focussing Questions:
When is 'energy efficiency' important?
What is 'energy efficiency' to a project developer?
What is the measure of 'energy efficiency'?
How does this impact on technology selection?

3. When is 'energy efficiency' important?
12/8/2018
When is 'energy efficiency' important?
Limited or very high cost energy (water) supply
Good corporate citizenship
Operating costs optimisation
Optionality – unreliable and multiple supply systems

4. What is 'energy efficiency' in project development?
12/8/2018
What is 'energy efficiency' in project development?
Process selection - particularly comminution
High efficiency drives
High efficiency lighting
Optimised materials handling (trucking, conveying and pumping)
Optimised elevations
Water recovery efficiency – (water can cost $4/m3)

5. $ cashflow, NPV, ROV What is the measure of 'energy efficiency'?
12/8/2018
What is the measure of 'energy efficiency'?
kWh/t ore processed?
kWh/t metal produced?
t CO2/t ore produced (including inherent energy)?
t CO2/t metal produced (including inherent energy)?
$ cashflow, NPV, ROV
Energy cost and supply risks are factored in
Corporate 'good citizen' policies are considered

6. Ingenuity & insight – the Ausenco group
12/8/2018
Ingenuity & insight – the Ausenco group

7. A cycle Need Idea Innovation Cost reduction
12/8/2018
A cycle
Need
Idea
Innovation
Cost reduction
Paradigm shift (only when cost effective)

8. Why doesn’t every one drive a Prius?
12/8/2018
Why doesn’t every one drive a Prius?

9. Energy efficient operation Cost inefficient
12/8/2018
Energy efficient operation
Cost inefficient
(unless you are a taxi operator)

10. Conclusions Energy efficiency is a sub-set of cost effectiveness
12/8/2018
Conclusions
Energy efficiency is a sub-set of cost effectiveness
The key driving forces are commercial
Energy costs
Energy supply limitations
Revenue implications
To optimise energy efficiency requires a 'business optimisation perspective'
Cost
People
Energy

11. 8 December 2018
Thank you
Ingenuity & insight – the Ausenco group | July | 11