About Renewable Energy Sources
Biomass, the subject of the first part of this lesson, is a widely used renewable energy source. As you learned earlier in the lesson, it constitutes nearly 10% of global TPES according to the IEA's 2017 Key World Energy Statistics and nearly 5% of U.S. TPES, according to Lawrence Livermore National Laboratory. As we have learned, it is processed in many different ways to produce a wide range of outputs for many kinds of applications, including heat for cooking, space heating and warming water; heat for industrial purposes; heat for electricity production; syngas; ethanol and biodiesel for transportation, and even methane for natural gas applications.
Other widely used renewable energy sources--hydro, wind and solar--are used almost exclusively for electricity generation. Energy from the sun also is used in solar hot water applications and other solar heating applications, including passive solar. But, its most common application is for electricity generation.
For the remainder of this lesson, and the following lesson, we will be considering renewable energy sources used to generate electricity: hydropower, then wind and solar (in the next lesson).
Renewable Energy for Electricity Generation
In their most recent International Energy Outlook (2017) with electricity projections, the EIA reports that renewable energy is the fastest-growing source of electricity generation (not just capacity!) in the IEO2017 Reference case through 2040. Overall, electricity generation from renewable energy sources is expected to increase 2.8% a year. In their 2016 Renewable Energy Medium-Term Market Report (the most recent report available), which projects to 2021, the IEA projected that renewable electricity capacity will grow by 42% between 2015 and 2021, and renewable sources will account for more than 60% of additional generation between 2015 and 2021.
To Read Now
Go to the "Electricity" section of the International Energy Outlook 2016 report. Read and browse as much as you like, but definitely read the "Overview" and "Renewable resources" sections.
Read the Executive Summary of the International Energy Agency's Renewable Energy Medium-Term Market Report 2016. Note that the IEA is referring to electricity whenever they refer to the "power sector."