rdl energy efficiency and new and renewable energy in commercial buildings – new zealand david...

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RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28 , Tokyo, Japan, 29-30 January, 2007 Energy Use in Commercial Buildings

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Page 1: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

Energy Efficiency and New and Renewable Energy in Commercial Buildings

– New Zealand

David F.S. Natusch

APEC EGNRET 28 ,

Tokyo, Japan, 29-30 January, 2007

Energy Use in Commercial Buildings

Page 2: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

Energy Efficiency in Commercial Buildings

New and Renewable Energy in Commercial Buildings

Future Initiatives

The New Zealand Profile

Key Points

Energy Use in Commercial Buildings

Coverage

Page 3: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

Few Significant Applications

• Mainly Passive.

Heat Loss Reduction

• Thermal Insulation,

• Radiation Minimisation.

Temperature Perception

• Wall Colours,

• Heat/Light Capture – Light pipes

Not an Impressive Record!

Energy Use in Commercial Buildings

Energy Efficiency

Page 4: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

New Zealand started with 100% Renewable Energy

• Firewood,

• Hydroelectricity.

Has gone Backwards in Renewable Energy Use

• Cheaper to use Coal, Gas and Petroleum Products.

Now trying to slow the Decline by Promoting:

• Hydro,

• Geothermal,

• Biogas,

• Wind Power,

• Biofuels.

A Slow Process

Energy Use in Commercial Buildings

New and Renewable Energy

Page 5: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

Energy Supply, 2005

Energy Supplied PJ Total Renewable

% %

Total Energy 688 100 27

Renewables 184 27 100

Non Biological

Hydro 84 12 46

Geothermal 81 12 44

Wind 2.2 0.3 1.2

Biological 17 2.4 9

Wastes: Sewage gas, Landfill gas, Ag. & Wood wastes

Ag. Crops

Wood Most Renewables non-Biological

Fats & Oils

Energy Use in Commercial Buildings

Current Energy Supply Distribution

Page 6: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

Energy Consumption, 2005

Energy Consumed PJ %

Total Energy 465 100

Agriculture 20 4

Industrial 136 29

Commercial 49 11

Residential 62 13

Transport 198 43

Commercial Energy use is Minor

Energy Use in Commercial Buildings

Current Consumer Energy Distribution

Page 7: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

Now trying to slow the Decline by Promoting:

• Energy End Use Efficiency

• Solar – mainly Passive,

• Hydro – micro and mini,

• Geothermal,

• Biogas,

• Wind Power,

• Combined Solar and Wind Power

• Biofuels.

The main initiatives are in Energy Efficiency & Biofuels

Energy Use in Commercial Buildings

Current Initiatives

Page 8: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

New Zealand has a Maritime Climate

• Few Temperature Extremes,

• Less Heating and Cooling Demand cf. other APEC Economies,

Little Economic Drive

• Energy Efficiency savings are relatively small,

• No Government Subsidies for Energy Efficiency.

Most Energy Conservation Activity in Residential Sector

• Management of Off Peak Electricity for Water Heating,

• Building Insulation

The Economic Drivers are not Strong

Energy Use in Commercial Buildings

The New Zealand Profile

Page 9: RDL Energy Efficiency and New and Renewable Energy in Commercial Buildings – New Zealand David F.S. Natusch APEC EGNRET 28, Tokyo, Japan, 29-30 January,

RDL

• Low Heating and Cooling Demand cf. other APEC Economies,

• Energy Efficiency savings are relatively small,

• No Government Subsidies for Energy Efficiency,

• Most Energy Conservation Activity in Residential Sector,

• Commercial Energy use quite small (11%),

• N & RE use not directed to Commercial Energy Sector,

• Quite high level of N & RE (29%) in the Energy Supply Mix,

• Government Policy to increase N & RE Supply,

• No significant initiatives for Commercial Buildings.

The Economic Drivers are not Strong

Energy Use in Commercial Buildings

Key Points