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

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

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

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

RDL Energy Supply, 2005 Energy Supplied PJ Total Renewable % % Total Energy Renewables Non Biological Hydro Geothermal Wind Biological 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

RDL Energy Consumption, 2005 Energy Consumed PJ % Total Energy Agriculture 20 4 Industrial Commercial Residential Transport Commercial Energy use is Minor Energy Use in Commercial Buildings Current Consumer Energy Distribution

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

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

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