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Author Topic: Renewables Reach a Tipping Point...  (Read 291647 times)

Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1550 on: March 03, 2017, 08:36:08 PM »
EIA:  U.S. electric generating capacity increase in 2016 was largest net change since 2011
More than 27 gigawatts (GW) of electricity generating capacity was added to the U.S. power grid during 2016, the largest amount of added capacity since 2012. These additions more than offset the retirement of roughly 12 GW of capacity, resulting in a net capacity gain of nearly 15 GW, the largest change since 2011. These net additions follow a 4 GW net capacity decrease in 2015—the largest net drop in capacity recorded in the United States.

The mix of capacity additions has changed considerably in recent years. In the past 15 years, nearly 228 GW of natural gas capacity was added, and from 2002 through 2006, natural gas made up most of the capacity additions in each year. More recently, renewable technologies, primarily wind and solar, have made up a larger share of additions. Of the 2016 total utility-scale capacity additions, more than 60% were wind (8.7 GW) and solar (7.7 GW), compared with 33% (9 GW) from natural gas. Because of differences in the capacity factor across different types of plants, shares of new capacity additions are not typically a good indicator of the shares of generation provided by new capacity across technologies. In addition to varying across generation technologies, new plant capacity factors can also vary significantly across regions.
...
https://www.eia.gov/todayinenergy/detail.php?id=30112
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1551 on: March 07, 2017, 05:46:57 PM »
As energy mix becomes cleaner, Minnesotans paying less for it
...The report points to another continuing trend – the decoupling of energy consumption from a growing economy. Since 2007 the national economy has grown by 12 percent while energy demand has fallen by 3.6 percent, she said.

Prices haven’t increased, either. Consumers across the nation actually pay four percent less per kilowatt hour for electricity today than they did in 2007 after taking into account inflation, the report said....
http://midwestenergynews.com/2017/03/07/as-energy-mix-becomes-cleaner-minnesotans-paying-less-for-it/


Electrek says:
Minnesota electricity getting cheaper as renewables added – Two caveats, 1. Gas prices are low, 2. There is a *lot* of renewables, yet. But – with that – I thought renewables were supposed to make electricity prices in the USA go through the roof? Isn’t a collapse of western economic society supposed to closely follow these greens and their weird electricity? I see the northeast USA with some of the lowest wholesale electricity prices of the new millennia – and this is a region with significant renewables and they’re shutting down old nuclear and coal. What’s up with that? Is it possible that our prices of energy might fall further while cleaning themselves? Is that comprehensible?

If you look really closely – at the base of these wind mills – you can see ‘tiny’ 75 ft tall wind mills. I will name them…mini-wind. :) 
https://electrek.co/2017/03/07/38898/
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Tor Bejnar

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Re: Renewables Reach a Tipping Point...
« Reply #1552 on: March 08, 2017, 05:57:21 PM »
From news article: Vertical wind turbines could produce 10x the power per acre as their horizontal counterparts
Source: Craig AE et al. Low order physical models of vertical axis wind turbines (link for abstract) in Journal of Renewable and Sustainable Energy. 2017.

Wind power surged last year, with enough turbines installed globally to generate over 54 gigawatts of power. Nearly all of those turbines were the good old-fashioned kind: a tall tower with three propeller-like blades rotating on top.

But researchers and some small companies have been working on another turbine concept for years: vertical-axis wind turbines (VAWTs), which are cylindrical and typically look like an egg-beater or a weather vane. Vertical-axis turbines are cheaper to make and maintain, take up less space, and safer for birds and bats. The problem is that they are not very efficient.

Now, researchers at Stanford University have created a state-of-the-art lab model that could make it easier to increase the productivity of VAWTs. The model, reported in the Journal of Renewable and Sustainable Energy, makes it easy to test how large arrays of vertical turbines function together.

The power output of a wind farm depends on how its turbines are arranged. That’s because individual turbines interact with each other and affect the flow of wind across the array. When conventional wind turbines are placed close to each other, for instance, upstream turbines slow down wind and cause turbulence, which decreases power output from neighboring turbines. This is why such turbines have to be placed hundreds of feet apart.

VAWTs, on the other hand, affect each other positively when placed close to each other. “We think that the VAWTs can have blockage effects causing speedup around the turbines that helps downstream turbines,” said Anna Craig, Stanford mechanical engineering PhD student and the study’s leader author, in a press release. An individual VAWT typically produces a fraction of the power produced by a same-sized conventional horizontal-axis wind turbine (HAWT). But if you pack VAWTs closer together, you could in theory produce 10 times as much power from the same acreage of land than an array of HAWTs.
...
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1553 on: March 08, 2017, 09:37:30 PM »
Tesla launches its Powerpack 2 project in Hawaii, will help Island of Kauai get more out of its solar power
Tesla recently brought online its massive Powerpack 2 project with Kauaʻi Island Utility Cooperative in Hawaii and held an event today to inaugurate the facility.

We are talking about a 52 MWh Tesla Powerpack installation with a 13 MW solar farm built by SolarCity. The system will help the Island of Kauai get more out of its solar power and retire more diesel generators.
...
KIUC serves just over 30,000 customers on the remote island and it already has significant solar power capacity, but they have to run diesel generators when the sun is not shining.

They can run 100% on renewables for short periods of times under the best conditions in mid-day if demand is low, but the new Tesla Powerpacks will enable them to achieve 100% renewables more frequently. ...
https://electrek.co/2017/03/08/tesla-powerpack-2-project-hawaii-kauai-solar-power/
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DrTskoul

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Re: Renewables Reach a Tipping Point...
« Reply #1554 on: March 08, 2017, 11:24:01 PM »
How many charge cycles before replacement does these powerpacks  allow ?
« Last Edit: March 09, 2017, 04:28:51 AM by DrTskoul »
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ghoti

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Re: Renewables Reach a Tipping Point...
« Reply #1555 on: March 09, 2017, 04:06:35 AM »
I think the claim is 5000 full charge equivalent cycles. I've seen 15 years mentioned as well. Might be a while before we know if it is true.

DrTskoul

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Re: Renewables Reach a Tipping Point...
« Reply #1556 on: March 09, 2017, 04:28:05 AM »
Thanks ghoti.
“You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird... So let's look at the bird and see what it's doing -- that's what counts.”
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1557 on: March 09, 2017, 06:24:13 PM »
Robots cleaning solar panels will increase long term energy production and lower operating costs.

Exosun releases module-cleaning robot and free software add-on for PV plant design
http://www.solarpowerworldonline.com/2017/03/exosun-releases-module-cleaning-robot-free-software-add-pv-plant-design/
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1558 on: March 12, 2017, 11:41:50 PM »
President Jimmy Carter installed solar panels on the White House back in 1979. (His successor, President Reagan, removed them.  President Obama installed new ones.)

Now, 10 acres of Jimmy Carter's land host solar panels that track the sun and power his hometown of Plains, Georgia.

http://www.ajc.com/news/jimmy-carter-leases-his-land-solar-power-much-plains/XwFS50Kf1wEI9fXxpvSUnM/
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magnamentis

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Re: Renewables Reach a Tipping Point...
« Reply #1559 on: March 13, 2017, 05:33:42 PM »
President Jimmy Carter installed solar panels on the White House back in 1979. (His successor, President Reagan, removed them.  President Obama installed new ones.)

Now, 10 acres of Jimmy Carter's land host solar panels that track the sun and power his hometown of Plains, Georgia.

http://www.ajc.com/news/jimmy-carter-leases-his-land-solar-power-much-plains/XwFS50Kf1wEI9fXxpvSUnM/


there is a huge step between someone who does NOT install them and someone who REMOVES them, horrible, didn't know that and even though it's long past it still makes me shaking my head heavily looking at such a
stupid move (by reagan i mean) thanks for the info.
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rboyd

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Re: Renewables Reach a Tipping Point...
« Reply #1560 on: March 13, 2017, 10:43:26 PM »
My worry in the U.S. is that it has a large amount of under utilized natural gas capacity. With the large falls in NG prices, and with the possibility of the NG prices going even lower ($2 mmbtu again?), may be cheaper just to increase the NG capacity usage than add Solar and Wind. The marginal cost has to be really low.

The climate-change driven warmer winters we are getting in the North East reduce NG usage for heating, and the unused supply may find its way into the electricity generating sector.

Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1561 on: March 14, 2017, 03:51:20 PM »
EIA estimates low-ball solar (again)

Even while increasings its numbers, the agency has again shown that it cannot be relied upon to produce reliable forecasts of the electricity future in the United States.
https://pv-magazine-usa.com/2017/03/13/eia-estimates-low-ball-future-solar-growth-again/
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1562 on: March 18, 2017, 06:28:19 PM »
U.S.:  The Block Island Wind Farm posted an impressive performance as winter storm Stella barreled through Rhode Island earlier this week.
All five turbines at the wind farm three miles off Block Island were operating at full capacity (30 megawatts) during much of the powerful storm Tuesday, according to Deepwater Wind’s performance data.

The wind farm produced clean power throughout the bulk of the storm, except for a window of several hours when sustained wind speeds exceeded 55 miles an hour. That’s the designated high-wind limit when the wind farm is designed to automatically power down and feather its blades until winds calm.

During that automatic shutdown, the wind farm successfully weathered winds that topped out at approximately 70 miles an hour. Once wind speeds decreased below the 55 mph threshold, the wind farm powered back up and resumed normal operations....
http://dwwind.com/press/project-update/
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Jim Hunt

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Re: Renewables Reach a Tipping Point...
« Reply #1563 on: March 18, 2017, 08:08:41 PM »
Here’s a long video of the first ever public event at the Met Office’s new High Performance Computing Complex near Exeter:



https://youtu.be/lE7fDp3kxqo?t=14m30s

The broad theme was the Exeter City Futures project, which aims "to make the region congestion free and energy independent by 2025". I was in attendance, and if you skip to the “Questions” section at the end you can even see me asking the UKMO's Vicky Pope a tricky question! I asked another question later too.

After that I had a long chat with David Underwood, since nobody else seemed terribly interested in what 16 petaFLOPS and counting might ultimately be capable of. Arctic sea ice inevitably entered the conversation. David said he was proud of the UKMO’s “unified” model’s performance in that regard. In ~3 yrs the ocean and atmospheric components of their model are due to become “close coupled”, at which point their sea ice predictions should improve as well.

The proof of that pudding will be in the eating of course!

P.S. My old trick for embedding a YouTube video doesn't seem to work anymore. Does anybody know the secret, if there still is one?
« Last Edit: March 18, 2017, 08:19:14 PM by Jim Hunt »
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1564 on: March 22, 2017, 04:37:54 PM »
California bills propose 'clean peak' standard to boost renewables deployment

• Lawmakers in the California Assembly and Senate have introduced legislation to encourage more clean energy resources in the state in order to address peak load, reliability and to avoid the need for new fossil fuel generation.

• The bills would require utilities to deploy clean energy during peak demand in order to meet California's aggressive greenhouse gas and renewable energy goals, while mandating the California Public Utilities Commission determine a percentage of kWh each peak-load time period to be served with clean energy.

•The bills build upon a proposal in Arizona, where the state consumer advocate proposed tweaks to the state renewable portfolio standard (RPS) that could maximize the value of new capacity by adding a timing component.
...

Electrek says:
California looking to specify renewables for peak moments – The gist – California legislators are attempting to restructure the power market so it makes more sense economically for renewable energy to be applied to the very expensive peak demand areas. The reason we ought watch these types of legislation is that places like California are at the cutting edge of power markets and how we’re going to monetize clean energy. Funny that we’ve so quickly progressed from renewables can’t scale and are expensive, to there are too many renewables and they’re so cheap we need to change everything.
https://electrek.co/2017/03/22/electrek-green-energy-brief-sunpower-ceo-doubtful-on-musks-ability-to-deliver-california/
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Sigmetnow

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Re: Renewables Reach a Tipping Point...
« Reply #1565 on: Today at 12:08:34 AM »
“At midday today, California got 56.7% of its power from renewables, a new record.”
https://twitter.com/billmckibben/status/846103064654180352
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