Norway Hydro

Norway has large hydro resources of about 30 GW.  This offers storage that can be used to balance intermittent renewables in Europe.  This article lays out many of the details of the opportunities, problems and pitfalls of using Norway as Europe’s battery for their Super Grid.


Europe, hydropower, energy storage, hydro, wind, solar, renewables, Germany, Denmark

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Lazard’s LCOE Report is Out for 2014

Lazard’s Levelized Cost of Energy report looks at energy costs both with and without subsidies.  Wind and solar continue to improve their position compared to other sources.

This report is very helpful in teasing apart fact from hype regarding subsidies of various power sources.

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World PV Capacity Equivalent to 30 Nuclear Power Plants

Growth of solar energy continues to ramp rapidly.  With 2013 figures released we see solar at 137GW which is equivalent to about 30 nuclear power plants.

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Some Informative Links From This Blog

Can we power the country with renewable energy?  Certainly the cost of renewable energy is dropping rapidly!  I think the answer is yes and I think it can happen much faster than most realize.  That said, the coal industry has an enormous incentive to disrupt renewable energy development and many utilities fear it.  It is a similar story for oil.  The Electric Vehicle (EV) is here to stay and will mainstream much faster than most can imagine.  The success of the EV depends upon the cost of lithium Ion batteries coming down rapidly.  Below are some well documented posts from this blog that show the path and trends that are revolutionizing energy.

Wind power from the Great Plains could provide much of the country’s electricity.  The missing link is no longer cost, rather it is transmission line access.  And there it is not cost but right of way.  High Voltage DC power transmission is an efficient way to move the power all that is left is to get the transmission line right of way’s.

Intermittency is a major difficulty with renewables.  However Great Plains wind is extraordinarily stable and so intermittency can be reduced considerably by using it.  But the need for storage and better load timing are important.  The EV and Lithium Ion batteries may offer a solution.  Prices of Lithium Ion batteries are dropping rapidly and EVs charge at night when wind in many areas blows the most.

Links list

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Economics of Energy Storage

There is a lot being written about energy storage.  Much of this is in the context of managing renewable energy intermittency.  A metric called Energy Stored On electrical energy Invested (ESOI) has been developed.  Among other things it is used to address the decision whether to curtail energy or store and use.  I found this summary to be helpful.  There are a variety of other options to avoid curtailment.  Two in particular are expanding the transmission grid.  This has two additional benefits.  First it improves reliability by creating additional redundant paths for electricity in the event of a localized outage.  The second is to harden relative to terrorist attack.  Currently there are 9 substations which if taken out at the same time could shut down the US grid for months.  Expanding the transmission network would add redundancy making it a much less attractive target for terrorists.

Lithium Ion, Batteries

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Electric Vehicles Are Great Match to Wind in Many Areas

EVs charge mostly at night.  In fact they can be set on a timer to charge after midnight when rates are cheaper.  In many areas this provides an excellent match to wind power.  During the high demand summer months, California offers a great example of this with wind picking up as the sun goes down.  As EV battery prices drop and make them a mass market item they offer the opportunity to soak up night time peaks allowing larger capacity to be deployed and in turn making more wind power available at peak demand times.

CAISO close up of hourly renewable production 3013 08 15Consider Texas, the most wind rich state in the country.  They are building out wind rapidly.  However perhaps not as much as they would like.  The problem is that wind in Texas is night peaking but the load from air conditioning peaks in the daytime.  Wind is not a good match to the Texas load as it stands.  But if EVs were ubiquitous they could charge at night enabling Texas to better take advantage of their wind resource while reducing carbon emissions from autos and from the coal and natural gas power plants that would otherwise be required to charge them.

The graphs below are typical of summer load and generation profiles in Texas and illustrates the point well.

Ercot wind 7-25-2013While the graphs above show the resource for a day, the graph below shows the behavior for the entire year.

Trent Mesa average hourly wind profilesThe subscription based educational portal Solar Learning Lab provides access to a variety of solar data sites from around the country.  The screenshot below shows data from an Archer City Texas solar array.  The match with wind above is quite good.  If Texas pursues solar to augment wind they will have an excellent complementary resource.

Solar Archer City power 8-29-2014Solar resource in Archer City Texas.

It is important to note that the fit is not perfect.  Around 7:00pm, solar has dropped off considerably while wind has not yet ramped.  This can be addressed by use of tracking arrays.  In the Southwest they tend to be cost effective on an energy basis and in this case would have the added benefit of making the solar / wind pairing eligible for a much higher capacity credit.  In other words, the tracking arrays would reduce or possibly eliminate the reliance on peakers for the 1/2 hour transition from solar to wind.  Also, due to the very short transition period, this could also be addressed with demand side management.  The technology for utility control of load such as hot water heaters and air conditioners is mature.  Businesses could save by reducing AC from 6:30pm to 8:00pm and homes could similarly reduce air conditioning in a tighter band to address this as well.

In the graphs below, a fixed and tracking array are compared.  These two solar arrays are at Rensselaer Polytechnic Institute.  They are the same size and use the same inverters.  One is on a fixed mount and the other on a tracking mount.  Late in the day there is harvest of electricity during the transition period which otherwise would be underserved by renewable resources.  This is high value and further justifies the expenditure for electricity.

Fixed Tracking Compared 8-24-2013Graph showing improved ability of the PV array to match load as it ramps to peak in the late afternoon.

Similar profiles are observed in California.  While it is true that the wind resource in late fall and winter is low in California, so to is their load.  In the summer when there is the highest demand on the grid, wind power is very reliable and available through the night.  In fact, if you look at the data, it turns out that wind power is very predictable in California.

The term intermittent can mean many things.  The general understanding is that intermittent means unpredictable or random.  However, the term is often applied even in the case of predictable renewable resources such as wind in TX or solar in the Southwest.  In each case, suggesting that the resource is random is naive at best.  See graph below of solar production from a CA based solar array.  Even on the rainy day the array produces considerable energy.  Of course on a rainy day, temps and therefore AC demand would be lower.  Generally , clouds and rain are predictable in CA.  The combination of advanced notice and load reduction minimize and possibly eliminate the grid stability ramifications that may be existent for high penetration of solar in other areas.

Solar Energy Production - Museum of Water and Life, Hemet CA

Energy production from a 600kW solar array in Hemet CA. Energy production is consistent and predictable.



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Li_Ion at $270 / kWhr EV Tipping Point May Be Closer Than The Analysts Think

Li_Ion at $270 / kWhr EV Tipping Point May Be Closer Than The Analysts Think.

via Li_Ion at $270 / kWhr EV Tipping Point May Be Closer Than The Analysts Think.

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Tesla is the Most Important Car Company – Morgan Stanley

Tesla is the Most Important Car Company – Morgan Stanley.

via Tesla is the Most Important Car Company – Morgan Stanley.

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Growth of Windpower in Fascinating Interactive Graphic

For interactive graphic on US Windpower growth click Here .

For Interactive graphic on world windpower growth – Click Here:  If there is a Pop-up, Click the X at the upper right of the pop-up to make it go away.


Graphic on wind capacity growth here .

Renewable Energy Cost Curves here .

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Tesla The Company

This post is a catchall to collect top stories and information about Tesla and Elon Musk.  I will post links to interesting information and to capture links that I don’t have time to write about at the time I spot them.

Li ion vs pumped hydro

Giga Factory and rapidly declining price of Lithium Ion Storage:

Giga Factory will be up and running by late 2016 and expect more of them by 2020.  See more on this here.

Giga factory updates, maybe Reno.

Comparing lithium Ion at 2013 prices to pumped storage.

These are blog posts by a guy who saw Elon Musk taking to the California PUC.  He provided his notes on key points.  In the first of these posts the take-away is that Li-ion materials cost about $65 / kWhr setting a near term limit on costs (materials prices can drop if demand justifies developing processes for synthesizing or obtaining them for less cost).

In the second post he suggests that oil is much better used as a raw material for synthetics and plastics.  I also found it interesting that he thought both SpaceX and Tesla were going to fail.  I have always thought the positive thinkers take it too far when they suggest that you should divorce yourself from reality.  Here he is, the most significant entrepreneur of our time acknowledging that it is all about hard work and drive, not denial of reality, that wins the day.

Peter Rive – Don’t cut the cord.  Storage is good, the grid is good, the network effect adds value – stay grid connected.

This is just the beginning – Expect Tesla to grow their battery business very rapidly.

More on the gigafactory and its implications for the future.

Direct Sales Model

This is a good article about resistance to Tesla’s direct sales model.  Dealers are trying to prevent Tesla from selling direct to the customer.  This strikes me as anti-competitive.  Here is an article about another car company that wants to use a similar sales model and may be an ally for Tesla.

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