Tag Archive: Hydropower

Jun 08 2015

Sunday Train: Making An Energy Revolution

Writing for Politico, “Energy Visionary” Vaclav Smil writes in Revolution? More like a crawl:

Undoubtedly, the U.S. is experiencing two notable energy transitions, from coal to natural gas and from fossil fuels to new renewables in electricity generation. These shifts are welcome because they promise to bring cleaner and less carbon-intensive supplies. But they cannot be rapid, and they bring their own technical, economic and social challenges. Energy infrastructure is the world’s most elaborate and expensive, and the longevity and inertia of many large energy enterprises make it impossible for any large, complex national system (to say nothing of the global level) to reconfigure itself even in three or four decades.

And the statement is, on its own terms, quite certainly correct. Yet I support calls for a “pedal to the metal” transition to low and no carbon, sustainable energy as a policy approach that we shall have to be pursuing in order to achieve what must be done. So, what gives? Is Vaclav Smil correct? And if he is, in what sense is he correct?

Aug 18 2014

Sunday Train: The Two Transitions to A Renewable Electricity Supply

The topic for this week’s Sunday Train was brought to my mind when I listened to the Energy Gang podcast. They were discussing the question of whether “CSP (that is, concentrated thermal solar power) is dead”, and the always entertaining, but not uniformly informative, “energy futurist” Jigar Shah declared that “CSP is dead” (segment starts 30:29), backing the claim up with a set of bullet points that fell far short of supporting the claim. And listening to the set of bullet points, it seemed to me that he was talking in the context of the phase of the transition to renewable energy that we are presently in, and ignoring the phase of the transition that we will have to pass through if we are to survive as a national economy and national economy.

In short, he seemed to be talking more as an energy presentist than an energy futurist, claiming that there was no plausible position for solar CSP power based on both the technology currently rolled out for a technology that is experiencing rapid development, and on context of renewable energy being added to an energy system which is untenable over the long term.

But I do not mean to single out Jigar Shah, since as I have recently been exploring various discussion spaces talking about various issues in the roll-out of renewable energy, cross-talk between the different phases of the transition to renewable energy seems to be commonplace. So what I wish to write about this Sunday afternoon is the “Two Transitions” to renewable energy: the Current Transition and the Next Transition.

Feb 17 2014

Sunday Train: Portfolio Theory vs the Myth of Intermittent Wind Power

This last week, in the comment section of the EnergyCollective, I saw the same myth that I have seen time and time again regarding wind power:

Fact 1: renewables are aleatorically intermittent, and so unreliable.

Fact 2: due to Fact 1, they cannot provide energy when it is needed, but only when and in the quantity they can

Fact 3: users have to get energy when they need it, not when it is aleatorically provided

Fact 4: to date, there is no storage system that can be useful for a complex industrial society

Fact 5: due to facts 1 to 4, renewables need to have a back up system that can cope with the needs of the users.

Fact 6: that back up system cannot be just stopped and then put to generation in a few seconds or minutes, and usually have to generate at low efficiency to maintain the back up at call point, generating added costs, besides the usuals as maintainance, lost profits, complex distribution grid, etc.

… not surprisingly ending with climate crisis denialism in “Fact” 8, since the name of the game here is clearly not arguing by starting with facts and seeing what conclusion you arrive it, but rather is myth creation and propagation in support of an already selected conclusion.

While many people don’t know what “aleatorically” means, many would actually share the misconception that windpower is an intrinsically intermittent resource. However, for wind power, the “Fact 1” is in many cases “Falsehood 1”. Even though individual wind turbines are intermittent, for many wind resource regions, it turns out that a substantial share of wind power is not intermittent at all, in either their “by chance (aleatorically) and unpredictable” component or their “by chance (aleatorically), though predictable” component.