residential air conditioning & peak electrical demand
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Residential Air Conditioning & Peak Electrical Demand
Mark Paterson, ENERGEX LimitedDemand Management Development & Projects Manager
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“Peak Demand”
“Peak Demand Management”
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“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)
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� “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
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� “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
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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
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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.
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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)
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Residential air conditioning is becoming a critical challenge for
electrical networks around the world
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Short, Intense Peaks in Demand
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Time of Day
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ALBANY CREEK / ARANA HILLS DEMAND CURVE
• Two consecutive summer days
• Only difference is ambient temperature
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17MVA
ALBANY CREEK / ARANA HILLS DEMAND CURVE
• Two consecutive summer days
• Only difference is ambient temperature
Short, Intense Peaks in Demand
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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
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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.”
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� 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
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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)
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“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)
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