1 Residential Air Conditioning & Peak Electrical Demand Mark Paterson, ENERGEX Limited Demand Management Development & Projects Manager
1
Residential Air Conditioning & Peak Electrical Demand
Mark Paterson, ENERGEX LimitedDemand Management Development & Projects Manager
2
“Peak Demand”
“Peak Demand Management”
3
“The leaders of the future are going to have three traits...A deep sense for potential new markets…
A great fingertip touch with technology…Understand ways to capitalise on these
everywhere in the world…”
*Jeff Immelt paraphrased from ‘The Articulate Executive in Action’ (2005)
4
� “Peak Demand” is surging demand for electricity during extremely brief periods of the year
� It’s a growing global issue that’s not going away
1-2% of year
150-200% demand surge
Annual load duration curve
5
� “Peak Demand Management” is achieving more intelligent, sustainable control of electrical networks and demand for electricity
� A critical component in any genuine move to energy sustainability
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:0
0
11:0
0
12:0
0
13:0
0
14:0
0
15:0
0
16:0
0
17:0
0
18:0
0
19:0
0
20:0
0
21:0
0
22:0
0
23:0
0
MW
0
5
10
15
20
25
30
35
40
45
Tem
pera
ture
Demand Temp
6
ENERGEX Limited
� Community-owned electricity distributor for South East Qld
� $6B+ assets
� 1.3 million customers
� 36,000 km overhead lines
� 13,000 km underground cables
� 249 substations
7
Context� Joint letter to DEWHA from:
– Ergon Energy– ENERGEX Limited– Integral Energy– ETSA Utilities– Western Power
� Requesting a significant increase in the focus on A/C unit demand management capability under MEPs framework
� We envision Australia as the global leader in this field and will work together to achieve this.
8
Annual peak demand growth in SEQ approx. ~200% energy volume growth
0%5%
10%15%20%25%30%35%40%45%
2001-02 2002-03 2003-04 2004-05 2005-06 2006-07
Energy growth (%) Demand Growth (%)
� Peak Demand drives network investment
� Largest component of bill increases in recent years (and growing)
9
Residential air conditioning is becoming a critical challenge for
electrical networks around the world
10
Short, Intense Peaks in Demand
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Time of Day
Lo
ad (
MV
A)
ALBANY CREEK / ARANA HILLS DEMAND CURVE
• Two consecutive summer days
• Only difference is ambient temperature
11
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Time of Day
Lo
ad (
MV
A)
17MVA
ALBANY CREEK / ARANA HILLS DEMAND CURVE
• Two consecutive summer days
• Only difference is ambient temperature
Short, Intense Peaks in Demand
12
Viable Options
� AS4755 series of Australian Standards now published – a world first!
� Extensive trial work conducted nationally:– ETSA Utilities (>1,000 homes)– ENERGEX (>1,500 homes)– Western Power– Ergon Energy
� Many learnings from these trials informed drafting of AS4755 standards
13
What about Comfort…?
� This is NOT about turning off air conditioners!
� Sophisticated demand A/C demand management is designed to minimise any perceivable change
� Trials have universally demonstrated negligible impact on residential comfort (typically 85-90% satisfaction!)
“Haven’t noticed a difference, I think it’s a good initiative.”
“Keep up the good work. Would be happy to put the other air conditioner in the trial.”
14
� Air conditioning demand management is one of the KEY issues for electrical networks in Australia
� The Australian public will not accept continuous peak demand-driven tariff increases
� Widespread A/C demand management will play a critical part of avoiding or minimising network events
� Mandatory legislative requirement for compliance of all A/C units with AS4755.3.1
� Smarter, more intelligent…
“A little by a lot of people gives a big impact”
The Future for A/C
* ETSA Utilities
15
Imperatives for Utilities ü Ownership. Appointment of specific Federal and State
entities to drive demand management implementation and enforcement
ü DM-Ready. Legislated mandatory requirement for compliance of A/C units with AS4755.3.1 (under MEPs framework)
ü Pricing. New tariff structures reflecting the true cost of supply electricity to extremely ‘peaky’ loads
ü Unit Efficiency. Strong support for MEPs work strengthening A/C energy efficiency standards
ü Application Efficiency. Need for an Australian Standard addressing residential A/C design and installation (for adoption under BCA)
16
“The leaders of the future are going to have three traits...A deep sense for potential new markets…
A great fingertip touch with technology…Understand ways to capitalise on these
every place in the world…”
*Jeff Immelt paraphrased from ‘The Articulate Executive in Action’ (2005)
17