I received an invitation from the IEA (International Energy Association) to participate in a WebEx presentation of their Renewable Energy Medium-Term Report 2016 (a five year market analysis and forecast), which was at 9:00 PM Paris time ...arrrgh, 6:00 AM my time. I also received an embargoed PDF of their report, not to be released until October 25th. The PowerPoint presentation was given by Paolo Frankl, head of the IEA Renewable Energy Division. I took several screenshots of the presentation as well.
In a nutshell:
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Figure 1: Screenshot From the Presentation--Renewable Energy Capacity Additions |
Some things to note about Figure 1:
- Most growth in renewable energy has been in wind and solar, wind in particular.
- Shows capacity, not actual energy production.
I tend to read between the lines of studies to ferret out what the researchers chose not to highlight. If you want to see what they chose to highlight and how they chose to do it,
here's the link to it.
In the end it's energy production that counts, capacity, not so much. Installing solar panels in a cave will increase installed capacity but produce no power. Actual production for solar might be something like 10-15% of capacity and for wind, about 20-30%. A solar panel in Seattle will produce a fraction of the energy of a solar panel in a sunny place, ditto for wind. If Figure 1 were to plot actual energy produced instead of capacity, it would look very different in both magnitude and shape.
I created Figure 2 below using data from the 2016 BP statistical review and an IPCC Assessment report to put the impact of wind and solar into perspective. I wanted to put it into perspective to demonstrate that wind and solar alone are very unlikely to get us to an 80% reduction in emissions.
Keep in mind that emissions displaced depend on energy source displaced. If hydro or nuclear were displaced, emissions actually increase. If natural gas is displaced, emissions will drop but natural gas emits a lot less carbon than coal. Wind and solar rarely displace coal because coal is primarily used for baseload. Claims that wind and solar have replaced coal are actually the result of switching from coal to gas so that it can dampen erratic wind and solar output. Typically, wind and solar serve as fuel reduction devices for natural gas power stations which limits their ability to reduce emissions, particularly from coal.
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Figure 2: Total Global GHG Emissions in Million Tonnes CO2 Abated by Wind and Solar |
Typically you see bar charts that paint solar and wind in a more favorable light.
- They may show installed capacity instead of power output.
- They may chart growth rates as opposed to percentages of emissions abated.
- They may show power output instead of emissions abated.
- They may only compare their abatement to emissions from electricity production as opposed all sources of emissions (deforestation, heat, transport etc).
- The chart may not start at zero, making their contribution appear much larger, and on and on it goes.