World energy supply and consumption refers to the global primary energy production, energy conversion and trade, and final consumption of energy. Energy can be used in various different forms, as processed fuels or electricity, or for various different purposes, like for transportation or electricity generation. Energy production and consumption are an important part of the economy. A serious problem concerning energy production and consumption is greenhouse gas emissions. Of about 50 billion tonnes worldwide annual total greenhouse gas emissions, [3] 36 billion tonnes of carbon dioxide was emitted due to energy (almost all from fossil fuels) in 2021. [4]
The goal set in the Paris Agreement to limit climate change will be difficult to achieve. [5] Many scenarios have been envisioned to reduce greenhouse gas emissions, usually by the name of net zero by 2050. As of 2022, energy consumption is still about 80% from fossil fuels. [6] The Gulf States and Russia are major energy exporters, with notable customers being the European Union and China, where domestically not enough energy is produced in order to satisfy energy demand. Energy consumption generally increases about 1–2% per year, [7] except for solar and wind energy which averaged 20% per year in the 2010s. [8] [9]
The energy that is produced, like from fossil fuels, is processed in order to make it suitable for consumption by end users. The energy supply chain from initial production and final consumption involves many different activities, causing a loss of useful energy ultimately, [10] see exergy.
Energy consumption per capita in North America is very high, while in less developed countries it is low and usually more renewable. [11] [12] There is a clear connection between energy consumption per capita, and GDP per capita. [13]
Many countries publish statistics on the energy supply and consumption of either their own country, of other countries of interest, or of all countries combined in one chart. One of the largest organizations in this field, the International Energy Agency (IEA), sells yearly comprehensive energy data which makes this data paywalled and difficult to access for internet users. [14] The organization Enerdata on the other hand publishes a free Yearbook, making the data more accessible. [6] Another trustworthy organization that provides accurate energy data, mainly referring to the USA, is the U.S. Energy Information Administration.
This is the worldwide production of energy, extracted or captured directly from natural sources. In energy statistics, primary energy (PE) refers to the first stage where energy enters the supply chain before any further conversion or transformation process.
Energy production is usually classified as:
Primary energy assessment by IEA follows certain rules [note 1] to ease measurement of different kinds of energy. These rules are controversial. Water and air flow energy that drives hydro and wind turbines, and sunlight that powers solar panels, are not taken as PE, which is set at the electric energy produced. But fossil and nuclear energy are set at the reaction heat, which is about three times the electric energy. This measurement difference can lead to underestimating the economic contribution of renewable energy. [18]
Enerdata displays data for "Total energy / production: Coal, Oil, Gas, Biomass, Heat and Electricity" and for "Renewables / % in electricity production: Renewables, non-renewables". [6]
The table lists worldwide PE and the countries producing most (76%) of that in 2021, using Enerdata. The amounts are rounded and given in million tonnes of oil equivalent per year (1 Mtoe = 11.63 TWh (3.23 megajoules), where 1 TWh = 109 kWh) and % of Total. Renewable is Biomass plus Heat plus renewable percentage of Electricity production (hydro, wind, solar). Nuclear is nonrenewable percentage of Electricity production. The above-mentioned underestimation of hydro, wind and solar energy, compared to nuclear and fossil energy, applies also to Enerdata.
The 2021 world total energy production of 14,800 MToe corresponds to a little over 172 PWh / year, or about 19.6 TW of power generation.
Total (MToe) | Coal | Oil & Gas | Renewable | Nuclear | |
---|---|---|---|---|---|
China | 2,950 | 71% | 13% | 10% | 6% |
United States | 2,210 | 13% | 69% | 8% | 10% |
Russia | 1,516 | 16% | 78% | 2% | 4% |
Saudi Arabia | 610 | 0 | 100% | 0 | 0 |
Iran | 354 | 0 | 99% | 0 | 1% |
United Arab Emirates | 218 | 0 | 99% | 0 | 1% |
India | 615 | 50% | 11% | 33% | 6% |
Canada | 536 | 5% | 81% | 10% | 4% |
Indonesia | 451 | 69% | 17% | 14% | 0 |
Australia | 423 | 64% | 33% | 3% | 0 |
Brazil | 325 | 1% | 55% | 42% | 2% |
Nigeria | 249 | 0 | 47% | 53% | 0 |
Algeria | 150 | 0 | 100% | 0 | 0 |
South Africa | 151 | 91% | 1% | 8% | 0 |
Norway | 214 | 0 | 93% | 7% | 0 |
France | 128 | 0 | 1% | 34% | 65% |
Germany | 102 | 27% | 3% | 47% | 23% |
World | 14800 | 27% | 53% | 13% | 7% |
Nation | Export minus Import in 2021 (MToe) [19] |
---|---|
Russia | 682 |
Saudi Arabia | 388 |
Australia | 296 |
Canada | 245 |
Indonesia | 226 |
Norway | 185 |
Italy | -114 |
Turkey | -118 |
Germany | -187 |
South Korea | -239 |
India | -323 |
Japan | -357 |
China | -803 |
Primary energy is converted in many ways to energy carriers, also known as secondary energy: [20]
Electricity generators are driven by steam or gas turbines in a thermal plant, or water turbines in a hydropower station, or wind turbines, usually in a wind farm. The invention of the solar cell in 1954 started electricity generation by solar panels, connected to a power inverter. Mass production of panels around the year 2000 made this economic.
Much primary and converted energy is traded among countries. The table lists countries with large difference of export and import in 2021, expressed in Mtoe. A negative value indicates that much energy import is needed for the economy. [19] Russian gas exports were reduced a lot in 2022, [21] as pipelines to Asia plus LNG export capacity is much less than the gas no longer sent to Europe. [22]
Transport of energy carriers is done by tanker ship, tank truck, LNG carrier, rail freight transport, pipeline and by electric power transmission.
TES | PE | |
---|---|---|
China | 3,650 | 2,950 |
India | 927 | 615 |
Russia | 811 | 1,516 |
Japan | 400 | 52 |
South Korea | 298 | 151 |
Canada | 289 | 536 |
Germany | 286 | 102 |
Saudi Arabia | 219 | 610 |
Year | TES |
---|---|
1990 | 8,700 |
2000 | 9,900 |
2010 | 12,600 |
2019 | 14,400 |
2020 | 13,800 |
2021 | 14,500 |
Total energy supply (TES) indicates the sum of production and imports subtracting exports and storage changes. [23] For the whole world TES nearly equals primary energy PE because imports and exports cancel out, but for countries TES and PE differ in quantity, and also in quality as secondary energy is involved, e.g., import of an oil refinery product. TES is all energy required to supply energy for end users.
The tables list TES and PE for some countries where these differ much, both in 2021 and TES history. Most growth of TES since 1990 occurred in Asia. The amounts are rounded and given in Mtoe. Enerdata labels TES as Total energy consumption. [24]
25% of worldwide primary production is used for conversion and transport, and 6% for non-energy products like lubricants, asphalt and petrochemicals. [14] In 2019 TES was 606 EJ and final consumption was 418 EJ, 69% of TES. [25] Most of the energy lost by conversion occurs in thermal electricity plants and the energy industry own use.
There are different qualities of energy. Heat, especially at a relatively low temperature, is low-quality energy, whereas electricity is high-quality energy. It takes around 3 kWh of heat to produce 1 kWh of electricity. But by the same token, a kilowatt-hour of this high-quality electricity can be used to pump several kilowatt-hours of heat into a building using a heat pump. Electricity can be used in many ways in which heat cannot. So the loss of energy incurred in thermal electricity plants is not comparable to a loss due to, say, resistance in power lines, because of quality differences.
In fact, the loss in thermal plants is due to poor conversion of chemical energy of fuel to electricity by combustion. Chemical energy of fuel is not low-quality because conversion to electricity in fuel cells can theoretically approach 100%. So energy loss in thermal plants is real loss.
Total final consumption (TFC) is the worldwide consumption of energy by end-users (whereas primary energy consumption (Eurostat) [27] or total energy supply (IEA) is total energy demand and thus also includes what the energy sector uses itself and transformation and distribution losses). This energy consists of fuel (78%) and electricity (22%). The tables list amounts, expressed in million tonnes of oil equivalent per year (1 Mtoe = 11.63 TWh) and how much of these is renewable energy. Non-energy products are not considered here. The data are of 2018. [14] [28] The world's renewable share of TFC was 18% in 2018: 7% traditional biomass, 3.6% hydropower and 7.4% other renewables. [29]
In the period 2005–2017 worldwide final consumption of coal increased by 23%, of oil and gas increased by 18%, and that of electricity increased by 41%. [14]
Fuel comes in three types: Fossil fuel is natural gas, fuel derived from petroleum (LPG, gasoline, kerosene, gas/diesel, fuel oil), or from coal (anthracite, bituminous coal, coke, blast furnace gas). Secondly, there is renewable fuel ( biofuel and fuel derived from waste). And lastly, the fuel used for district heating.
The amounts of fuel in the tables are based on lower heating value.
The first table lists final consumption in the countries/regions which use most (85%), and per person as of 2018. In developing countries fuel consumption per person is low and more renewable. Canada, Venezuela and Brazil generate most electricity with hydropower.
Fuel Mtoe |
of which renewable |
Electricity Mtoe |
of which renewable |
TFC pp toe | |
---|---|---|---|---|---|
China | 1,436 | 6% | 555 | 30% | 1.4 |
United States | 1,106 | 8% | 339 | 19% | 4.4 |
Europe | 982 | 11% | 309 | 39% | 2.5 |
Africa | 531 | 58% | 57 | 23% | 0.5 |
India | 487 | 32% | 104 | 25% | 0.4 |
Russia | 369 | 1% | 65 | 26% | 3.0 |
Japan | 201 | 3% | 81 | 19% | 2.2 |
Brazil | 166 | 38% | 45 | 78% | 1.0 |
Indonesia | 126 | 21% | 22 | 14% | 0.6 |
Canada | 139 | 8% | 45 | 83% | 5.0 |
Iran | 147 | 0% | 22 | 6% | 2.1 |
Mexico | 95 | 7% | 25 | 18% | 1.0 |
South Korea | 85 | 5% | 46 | 5% | 2.6 |
Australia | 60 | 7% | 18 | 21% | 3.2 |
Argentina | 42 | 7% | 11 | 27% | 1.2 |
Venezuela | 20 | 3% | 6 | 88% | 0.9 |
World | 7050 | 14% | 1970 | 30% | 1.2 |
The next table shows countries consuming most (85%) in Europe.
Country | Fuel Mtoe |
of which renewable |
Electricity Mtoe |
of which renewable |
---|---|---|---|---|
Germany | 156 | 10% | 45 | 46% |
France | 100 | 12% | 38 | 21% |
United Kingdom | 95 | 5% | 26 | 40% |
Italy | 87 | 9% | 25 | 39% |
Spain | 60 | 10% | 21 | 43% |
Poland | 58 | 12% | 12 | 16% |
Ukraine | 38 | 5% | 10 | 12% |
Netherlands | 36 | 4% | 9 | 16% |
Belgium | 26 | 8% | 7 | 23% |
Sweden | 20 | 35% | 11 | 72% |
Austria | 20 | 19% | 5 | 86% |
Romania | 19 | 20% | 4 | 57% |
Finland | 18 | 34% | 7 | 39% |
Portugal | 11 | 20% | 4 | 67% |
Denmark | 11 | 15% | 3 | 71% |
Norway | 8 | 16% | 10 | 100% |
Some fuel and electricity is used to construct, maintain and demolish/recycle installations that produce fuel and electricity, such as oil platforms, uranium isotope separators and wind turbines. For these producers to be economical the ratio of energy returned on energy invested (EROEI) or energy return on investment (EROI) should be large enough.
If the final energy delivered for consumption is E and the EROI equals R, then the net energy available is E-E/R. The percentage available energy is 100-100/R. For R>10 more than 90% is available but for R=2 only 50% and for R=1 none. This steep decline is known as the net energy cliff. [30]
Part of a series on |
Climate change mitigation |
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Due to the COVID-19 pandemic, there was a significant decline in energy usage worldwide in 2020, but total energy demand worldwide had recovered by 2021, and has hit a record high in 2022. [31]
In World Energy Outlook 2023 the IEA notes that "We are on track to see all fossil fuels peak before 2030". [32]: 18 The IEA presents three scenarios: [32]: 17
Alternative scenarios for achieving the Paris Climate Agreement Goals have been developed, using IEA data but proposing transition to nearly 100% renewables by mid-century, along with steps such as reforestation. Nuclear power and carbon capture are excluded in these scenarios. [33] The researchers say the costs will be far less than the $5 trillion per year governments currently spend subsidizing the fossil fuel industries responsible for climate change. [33]: ix
In the +2.0 C (global warming) Scenario total primary energy demand in 2040 can be 450 EJ = 10,755 Mtoe, or 400 EJ = 9560 Mtoe in the +1.5 Scenario, well below the current production. Renewable sources can increase their share to 300 EJ in the +2.0 C Scenario or 330 EJ in the +1.5 Scenario in 2040. In 2050 renewables can cover nearly all energy demand. Non-energy consumption will still include fossil fuels. [33]: xxvii Fig. 5
Global electricity generation from renewable energy sources will reach 88% by 2040 and 100% by 2050 in the alternative scenarios. "New" renewables—mainly wind, solar and geothermal energy—will contribute 83% of the total electricity generated. [33]: xxiv The average annual investment required between 2015 and 2050, including costs for additional power plants to produce hydrogen and synthetic fuels and for plant replacement, will be around $1.4 trillion. [33]: 182
Shifts from domestic aviation to rail and from road to rail are needed. Passenger car use must decrease in the OECD countries (but increase in developing world regions) after 2020. The passenger car use decline will be partly compensated by strong increase in public transport rail and bus systems. [33]: xxii Fig.4
CO2 emission can reduce from 32 Gt in 2015 to 7 Gt (+2.0 Scenario) or 2.7 Gt (+1.5 Scenario) in 2040, and to zero in 2050. [33]: xxviii
Global energy consumption continues to grow, but it does seem to be slowing – averaging around 1% to 2% per year.