... many countries and regions are already at or close to 100 percent now.
There is a group of countries, often with relatively small populations, that are gifted with the right conditions and topography to be able to generate most of their electricity from hydro electric plants. Most countries don't have the necessary conditions that allow them to do that. Most, so called developed countries, have already mostly exploited the feasible hydro-electric opportunities.
It also must be noted that hydro power is highly dependent on precipitation. Rates of production usually vary considerably from year to year and even during the year.
Kim OHara wrote: ↑
Thu May 24, 2018 11:35 am
On the way to mostly* renewable power -
https://thinkprogress.org/a-100-percent ... d233c76e5/
Think Progress wrote:The ongoing debate around whether it’s feasible to have an electric grid running on 100 percent renewable power in the coming decades often misses a key point: many countries and regions are already at or close to 100 percent now.
According to data compiled by the U.S. Energy Information Administration, there are seven countries already at, or very, near 100 percent renewable power: Iceland (100 percent), Paraguay (100), Costa Rica (99), Norway (98.5), Austria (80), Brazil (75), and Denmark (69.4). The main renewables in these countries are hydropower, wind, geothermal, and solar.
for all the inline links to further information.
Is it realistic to label this group of countries as "many countries"?
I did a internet search on the first 4 countries, for instance "Iceland hydro power". All of them get the large majority of their electrical generation from hydro-electrical plants. Iceland in particular also enjoys a lot of geothermal.
Unless you are in one of these countries what does this information mean to you? Very little. It's hardly relevant. So big points for some interesting facts but a "key point" in the ongoing debate? Hardly.
The citation for the percentages quoted above is from wikipedia. Wikipedia tells us that:
This piece in The Guardian
contradicts Kim's claim of %99. Hydro-electric plus geothermal generates about %90, not %99, of the power in most years.
Costa Rica gets most of its electricity from hydroelectric plants
and a recent period of unusually heavy rain allowed the country to reach the milestone. This clean power is bolstered by geothermic energy
from the country’s volcanoes and a small amount of wind and solar power. Most years, these sources allow Costa Rica to generate approximately 90% of its electricity without burning fossil fuels.
-- https://www.theguardian.com/commentisfr ... ate-change
Paraguay (pop. less than 7 million) gets nearly all it's electricity from a single large dam which it shares with Brazil.
Readers should keep in mind that many plans for reducing carbon emissions call for greatly increasing electricity generation (perhaps a %50 increase) to replace fossil fuels. So being able to meet current demand from hydro-electric answers today's needs but probably not tomorrow's.
Also pay attention to claims made in one region of country and second for claims made for limited period during any one year. It's probably safe to assume that the region in question enjoys that nation's best hydro-electric or other renewable resources and conditions during the test period were favorable. In general pay attention to the "fine print" ... and the claims of enthusiastic boosters.
So last week, a Chinese province went out of their way to show it was possible for the entire region to run solely on green energy.
And it seems they did just that. For seven continuous days, over 5 million citizens living in the Qinghai Province in northwest China survived on 100 percent renewable energy, according to the State-run Xinhua News Agency.
... hydro power contributed about 72.3 percent
, while newer energy sources, including wind and solar picked up the rest of the slack.
... Qinghai's power grid has a total installed capacity of 23.4 million kW, and a whopping 83.8 percent of that power
currently comes from solar, wind and hydro power.
https://www.sciencealert.com/a-chinese- ... for-7-days
"... a whopping 83.8 percent of that power
currently comes from solar, wind and hydro power."?
The relative contributions are listed in reverse order.
It would be more informative to write " a whopping 83.8 percent of that power
currently comes largely from hydro power with contributions from wind and solar. IMO that is more "honest".