The
recent spike in crude oil prices has made it clear, once again, how much the US
are dependent on imported energy. The Solyndra fiasco has shown how illusory
the promise of readily available, cheap and clean renewable energy really was,
at least for now.
One
day perhaps, we will be able to generate wind and solar power effectively,
cheaply and reliably enough so that it will become a significant component of
our national power infrastructure. By“effectively” I mean without having to
cover hundreds of square miles of land with solar panels or wind farms; by
“cheaply”I mean without having to offer large subsidies or tax breaks; by “reliably”
I mean without having to build backup conventional power plants to make up for
the very low capacity factor inherent, so far, in these alternative power
sources.
This
may take two or three decades before becoming a reality, or it may never happen.
Right now, it makes little sense to spend considerable sums of money at a time
when federal and local government finances are strapped to promote “new” energy
sources that are not ready for prime time. Furthermore, we have two much better
(meaning cheaper, more scalable, and environmentally friendlier in my view)
sources of energy: natural gas and nuclear.
The US
has plentiful reserves of conventional, offshore and shale gas; the US also has
great expertise in building and operating nuclear power plants, and Canadian
uranium deposits are more secure than Middle Eastern oil and very large.
The following table prepared by the Department of Energy
compares the all-in cost/levelized[1]of producing one megawatthour from
new plants to be built today and starting operations in 2016. In this first
table, the DOE doesn’t differentiate between more favorable and less favorable
locations but takes a national average. Alternative energy (wind and solar) are
showed at real costs, meaning without the benefit of tax breaks or other
incentives.
Levelized cost of new
generation (2009 US$/mwhr)
Plant type
|
Capacity factor
|
Total system
levelized cost
|
|
|
|
|
|
|
|
|
|
|
|
|
Advanced coal
|
85
|
$109.7
|
|
85
|
$136.5
|
Natural gas – Advanced CC
|
87
|
$62.2
|
Nat gas – Adv. CC w/CCS
|
87
|
$88.4
|
Advanced nuclear
|
90
|
$114
|
Wind - offshore
|
34
|
$243.7
|
Wind
|
34
|
$96.1
|
Solar photo-voltaic
|
25
|
$269.3
|
Solar thermal
|
18
|
$312.2
|
Geothermal
|
91
|
$99.8
|
We can draw a few preliminary conclusions from this table:
1.
Natural
gas is the cheapest option, even after adding the cost of carbon capture and sequestration,
with geothermal close behind;
2.
Solar is
much more expensive than any other option;
3.
Wind
offshore (where there is little NIMBY opposition) is very expensive while
onshore (which carries much higher NIMBY opposition) seems a competitive
option;
4.
Nuclear is
cheaper than coal (and doesn’t pollute) and not so far behind the likes of
geothermal, nat gas and onshore wind.
However,
it is very important to realize that the above costs are those of the energy produced;
they do not include the costs of ensuring that the country is reliably supplied
with electricity. When wind farms only produce energy 34% of the time, some
other power plant must be built to supply energy during the other 66%. The
capacity factors show a very wide difference in the ability of various sources
of energy to reliably produce energy.
To assess
the true costs of each energy source, we must factor the cost of backup power.
We will assume that backup energy is produced by combined cycle power plants
equipped with CCS (as it typically is). To compare all options, we will adjust
the costs of each plant type so as to reach the equivalent of a 91% capacity
factor. We do not include the (high) costs of building extra transmission lines
to connect the backup power plants. Nevertheless, the results are telling, as
the following table shows:
Levelized
and equalized cost of new generation (2009 US$/mwhr)
Plant type
|
Adj. capa. factor
|
Total system levelized cost
|
|
|
|
|
91
|
$114.9
|
Nat gas – Adv. CC w/CCS
|
91
|
$91.3
|
Advanced nuclear
|
91
|
$114.7
|
Wind -
offshore
|
91
|
$348
|
Wind
|
91
|
$200.4
|
Solar
photo-voltaic
|
91
|
$433.5
|
Solar
thermal
|
91
|
$564.5
|
Geothermal
|
91
|
$99.8
|
Once these
adjustments are made, it becomes very clear that there are only three types of
power plants that are relatively clean, almost always on, and cheap: combined
cycle gas turbines with CCS, geothermal and nuclear. As I said earlier, the
cost of transmission lines is not included in the above figures, understating
the comparative advantages of the three leaders.
While
geothermal looks very attractive and is being developed in California and
elsewhere, its potential is limited by geology.
Some may
argue that, cost-wise, onshore wind is “only” twice as expensive as the
leaders. The problem is scalability and land usage. Wind farms occupy huge
areas of land compared to natural gas and nuclear plants. They also pose environmental problems, such
as noise, and they have an adverse impact on the value of properties in their
vicinities.
As for
solar plants, while technology is advancing rapidly, they are still very
inefficient and consequently anti-economical.
They also occupy too much land.
Their future may lie at the individual habitat level; but even then, the
wide fluctuation in their output would necessitate large investments in smart
counters and transmission power lines.
The DOE
levelized cost numbers are based on national averages; it is worth mentioning
that in the case of wind and solar, location has a much bigger impact on costs
than for nuclear or gas-fired. In other words, the gap in levelized costs
between the most favorable and unfavorable location/region is much broader.
This means that scalability is further constrained.
Range
in levelized costs (not equalized)
Plant type
|
Minimum
|
Average
|
Maximum
|
(Max-Min)/Av%
|
|
|
|
|
|
Nat gas
– Adv. CC w/CCS
|
$79.8
|
$88.4
|
$102.7
|
25.9%
|
Advanced
nuclear
|
$109.8
|
$114
|
$121.6
|
10.4%
|
Wind -
offshore
|
$187.1
|
$243.7
|
$350
|
66.8%
|
Wind
|
$82.3
|
$96.1
|
$115.5
|
34.6%
|
Solar
photo-voltaic
|
$158.9
|
$211
|
$324.4
|
78.4%
|
Solar
thermal
|
$192
|
$312.2
|
$642.5
|
144.3%
|
Geothermal
|
$85.7
|
$99.8
|
$115.8
|
30.2%
|
Finally, there is the reality of where we are starting from. In 2011, the name
plate capacity of our power plants (not including hydro, oil-fired) was as
follows:
Name
plate capacity in gigawatts
Plant type
|
Capacity
|
|
|
Coal
|
342.3
|
Natural
gas
|
467.2
|
Nuclear
|
106.7
|
Wind
|
39.5
|
Solar
|
1
|
Geothermal
|
2.4
|
Given the
limited scalability and high levelized costs as well as the dire financial
condition of the federal and local governments, it doesn’t make sense to push
renewable as hard as we currently are. It is my view that nuclear and natural
gas will eventually win the day.
At
present, rock-bottom US natural gas prices are wrecking havoc on gassy E&P
companies, accelerating the switch from coal to gas-fired power plants and
generally compressing the profit margins of merchant power producers. Over
time, the price of natural gas is bound to rise for three reasons:
1.
Supply
will be reduced as it is unprofitable for most E&P companies to drill for
more gas; witness the cutbacks already announced by the likes of Chesapeake
Energy and Southwestern Energy;
2.
Domestic
use of gas will increase, be it in the power sector, in some areas of transport
or in the chemical industry. To that end, very large investments in plant and
equipment have already started; witness Dow Chemical for example;
3.
Globally, there is a huge arbitrage opportunity to be exploited: LNG sells in
Asia at $13 to $16/mbtu; US gas sells for $2.5 at Henry Hub; the cost of
liquefying the gas and transporting it to Asia is about $6. From Louisiana to
British Columbia, we see a major drive to build gas liquefaction plants and
export terminals. We also see some slowdown in new LNG projects in Australia
when these were deemed "no-brainers" a decade ago.
Nuclear
power suffers from the fallouts of the Fukushima accident and the past laxity
of Tokyo Electric Power (TEPCO), the plants’ operator. But the economics are
there for all to see. So are the politics. It makes little sense for Europe to
trade some of the energy security afforded by nuclear plants for an increase
dependence on Russian imports and volatile crude oil prices[4].
For the US, and with the possible exception of some Californian locations,
nuclear power is very safe, and indeed the industry has an excellent safety
record, Three Mile Island included.
This
is a long game; it could take three years or more before the US nat gas market
regains its equilibrium and the specter of Fukushima recedes from collective
memories. But besides the objective merits of these energy sources, I feel
comforted by American psyche and free markets. In this country, arbitrage
opportunities tend to be exploited quickly, and there is abundant capital to be
put to work. Indeed, the gap may be closed faster than we think as America
often "over-does it" and rushes along. Perhaps the best example of
this has been shale gas, while the worst has been financial derivatives.
In
my view, the stock price of natural gas and uranium producers is too low; the
same is true of merchant power producers that operate natural gas or nuclear
plants. I am long these stocks.
[1]
The DOE first calculates the costs of building, operating, fuel and maintenance
a power plant over a 30 year cycle. It then takes their present value and
spreads them equally and annually. Inflation is taken out by expressing these
values in real US dollars of 2009. Hence the term “levelized”.
[2]
CCS: carbon control and sequestration.
[3]
CCS: carbon control and sequestration.
[4]
Most natural gas imports from Russia are pegged to crude oil, albeit with a 6
to 9 month lag.