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WORLD ENERGY [R]EVOLUTION A SUSTAINABLE ENERGY OUTLOOK scenarios for a future energy supply GLOBAL SCENARIO BACKGROUND MAIN SCENARIO ASSUMPTIONS POPULATION DEVELOPMENT ECONOMIC GROWTH OIL & GAS PRICE PROJECTIONS COST OF CO2 EMISSIONS COST PROJECTIONS SUMMARY OF RENEWABLE ENERGY COST DEVELOPMENT ASSUMED GROWTH RATES IN DIFFERENT SCENARIOS 5“towards a image WIND TURBINE IN SAMUT SAKHON, THAILAND. © GP/VINAI DITHAJOHN “the technology sustainable is here, all we global need is energy political supply will.” system.” GREENPEACE CHRIS JONES INTERNATIONAL SUPORTER CLIMATE CAMPAIGN AUSTRALIA 44
Moving from principles to action on energy supply and climate change mitigation requires a long-term perspective. Energy infrastructure takes time to build up; new energy technologies take time to develop. Policy shifts often also need many years to take effect. Any analysis that seeks to tackle energy and environmental issues therefore needs to look ahead at least half a century. Scenarios are important in describing possible development paths, to give decision-makers an overview of future perspectives and to indicate how far they can shape the future energy system. Two different kinds of scenario are used here to characterise the wide range of possible pathways for a future energy supply system: a Reference Scenario, reflecting a continuation of current trends and policies, and the Energy [R]evolution Scenarios, which are designed to achieve a set of dedicated environmental policy targets. The Reference Scenario is based on the reference scenario published by the International Energy Agency (IEA) in World Energy Outlook 2009 (WEO 2009). 44 This only takes existing international energy and environmental policies into account. Its assumptions include, for example, continuing progress in electricity and gas market reforms, the liberalisation of cross-border energy trade and recent policies designed to combat environmental pollution. The Reference scenario does not include additional policies to reduce greenhouse gas emissions. As the IEA’s projection only covers a time horizon up to 2030, it has also been extended by extrapolating its key macroeconomic and energy indicators forward to 2050. This provides a baseline for comparison with the Energy [R]evolution scenario. The Energy [R]evolution Scenario has a key target to reduce worldwide carbon dioxide emissions down to a level of around 10 Gigatonnes per year by 2050 in order to keep the increase in global temperature under +2°C. A second objective is the global phasing out of nuclear energy. First published in 2007, then updated and expanded in 2008, this latest revision also serves as a baseline for the more ambitious “advanced” Energy [R]evolution scenario. To achieve its targets, the scenario is characterised by significant efforts to fully exploit the large potential for energy efficiency, using currently available best practice technology. At the same time, all cost-effective renewable energy sources are used for heat and electricity generation as well as the production of bio fuels. The general framework parameters for population and GDP growth remain unchanged from the Reference Scenario. The Advanced Energy [R]evolution Scenario is aimed at an even stronger decrease in CO2 emissions, especially given the uncertainty that even 10 Gigatonnes might be too much to keep global temperature rises at bay. All general framework parameters such as population and economic growth remain unchanged. The efficiency pathway for industry and “other sectors” is also the same as in the basic Energy [R]evolution scenario. What is different is that the advanced scenario incorporates a stronger effort to develop better technologies to achieve CO2 reduction. Given the enormous and diverse potential for renewable power, the advanced scenario also foresees a shift in the use of renewables from power to heat. Assumptions for the heating sector therefore include a faster expansion of the use of district heat and hydrogen and more electricity for process heat in the industry sector. More geothermal heat pumps are also used, which leads – combined with a larger share of electric drives in the transport sector – to a higher overall electricity demand. In addition a faster expansion of solar and geothermal heating systems is assumed. In all sectors, the latest market development projections of the renewables industry 45 have been taken into account (see table 5.13 Annual growth rates of RE energy technologies). In developing countries in particular, a shorter operational lifetime for coal power plants, of 20 instead of 40 years, has been assumed in order to allow a faster uptake of renewables. The speedier introduction of electric vehicles, combined with the implementation of smart grids and faster expansion of super grids (about ten years ahead of the basic Energy [R]evolution scenario) - allows a higher share of fluctuating renewable power generation (photovoltaic and wind) to be employed. The 30% mark for the proportion of renewables in the global energy supply is therefore passed just after 2020 (ten years ahead of the basic Energy [R]evolution scenario). The global quantities of biomass and large hydro power remain the same in both Energy [R]evolution scenarios, for reasons of sustainability. These scenarios by no means claim to predict the future; they simply describe three potential development pathways out of the broad range of possible ‘futures’. The Energy [R]evolution Scenarios are designed to indicate the efforts and actions required to achieve their ambitious objectives and to illustrate the options we have at hand to change our energy supply system into one that is sustainable. scenario background The scenarios in this report were jointly commissioned by Greenpeace and the European Renewable Energy Council from the Institute of Technical Thermodynamics, part of the German Aerospace Center (DLR). The supply scenarios were calculated using the MESAP/PlaNet simulation model adopted in the previous Energy [R]evolution studies. 46 Some detailed analyses carried out during preparation of the 2008 Energy [R]evolution study were also used as input to this update. The energy demand projections were developed for the 2008 study by Ecofys Netherlands, based on an analysis of the future potential for energy efficiency measures. The biomass potential, judged according to Greenpeace sustainability criteria, has been developed especially for this scenario by the German Biomass Research Centre. The future development pathway for car technologies is based on a special report produced in 2008 by the Institute of Vehicle Concepts, DLR for Greenpeace International. These studies are described briefly below. 5 scenarios for a future energy supply | SCENARIO BACKGROUND references 44 INTERNATIONAL ENERGY AGENCY, ‘WORLD ENERGY OUTLOOK 2007’, 2007 45 SEE EREC, RE-THINKING 2050, GWEC, EPIA ET AL 46 ‘ENERGY [R]EVOLUTION: A SUSTAINABLE WORLD ENERGY OUTLOOK’, GREENPEACE INTERNATIONAL, 2007 AND 2008 45
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geothermal energy Geothermal energy
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climate and energy policy GLOBAL ST
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