Tag Archives: Sun

A greener White House

by

0

As promised by Energy Secretary Chu and White House Council on Environmental Quality Sutley in 2010, the Obama administration is joining the legacy—alongside Presidents James Carter and George W. Bush—of using solar energy to power the White House.

The solar panels being installed on the White House are an important symbol of federal commitment to renewable energy. Even more important, however, is the administration’s greater commitment, which Juliet Eilperin reports as a pledge to generate 20% of the energy consumed by the federal government—including the military—from renewable resources by 2020.

20% of federal energy use isn’t a huge number in global, or even national, terms. To put it in perspective, we consume about 4.4 million Gigawatt-hours each year in the US, while 20% of federal energy consumption only amounts to about 3 Gigawatt-hours. But every bit counts! Worthwhile progress is often piecemeal—and to cast it in more relatable terms: generating 3 Gigawatt-hours from another source would require, for example, over 3,200 pounds of coal. By getting that energy from the Sun, we spare the atmosphere more than 63,000 pounds of carbon dioxide.

The panels at 1600 Pennsylvania Ave. only represent a small fraction of this overarching goal, but greening the White House is, in my opinion, wise both for both politics and aesthetics.

To the sun god!

Mars in 30 days? Solar powered space flight

by

0

Here I thought the Solar Impulse was a breakthrough in solar powered flight, but NASA, the University of Washington, and Elon Musk of SpaceX (among others) have turned it to 11. With a new Fusion Driven Rocket (FDR) design, engineers may be able to cut the trip to Mars from 8 months to somewhere between 30 and 90 days. And what’s more: the engine operates via “magnetic inertial confinement fusion,” which, thankfully its designers explain, means that the rocket’s fusion reactor could be run by solar power alone–200 KW to be exact (an extremely feasible number). If flying from California to New York on solar energy as the Impulse team intends is impressive (and it is), then the FDR team’s plan for solar powered space flight is out of this world.

Colonizing Mars–part of Musk’s plan for making life multi-planetary to ensure that “the light of consciousness is not extinguished”–is undoubtedly among the more fantastical utopian visions of the future of humanity. Moreover, the team hopes to eventually make interplanetary travel so efficient that it’s commonplace. Skeptics and detractors (myself sometimes among them) may question the endeavor on “realist” or ethical grounds, claiming that either resource scarcity or social collapse is likely to preclude any significant opportunities for interplanetary migration, or that leaving the Earth behind is a defeatist reaction to socio-ethical challenges here at home, like stabilizing the modern ecological crisis. Indeed, I still think these points have some validity.

But Julian Simon’s infinite resource of human innovation again rears its head. The FDR is already in the pipeline, so to speak. And I’ll be the first to champion the triumphs of solar technology–especially when space travel is involved. Like so many others I’m sure, the prospect of an interstellar humanity speaks volumes to my inner Lewis and Clark–the passion for adventure and discovery too often squelched by the pervasive impact of human activity on and ubiquitous presence in what remains of natural world.

Interplanetary exploration and colonization promise new environments, mysteries, challenges, and questions–philosophical and otherwise. Should we leave Earth in the first place? What is the purpose of colonizing another planet? What would “environmental philosophy” mean if/when we depart from our environment of origin? What new responsibilities do we have to the non-human if and when we undertake massive martian geo-engineering projects like terraforming? If human beings create a living ecosphere on Mars, should we see ourselves as eco-constituents subsumed by a greater natural cycle as we are here on Earth, or, in a sense, should we regard ourselves as semi-gods, directly responsible for the martian natural cycle’s very existence? How should we organize a new society on Mars? Do Earthly political philosophies still apply? Once society on Mars is established, what responsibility will Martian humans have to their Earth-dwelling counterparts, and vice versa, if any? And should we today move further into the final frontier by small precautionary steps or giant proactionary leaps? Barring any unforeseen fatal design flaws or socio-political roadblocks, we could soon have our generation’s Neil Armstrong moment on the red planet. And we’d get there on solar power no less. To the sun god!

Cheers,

jmk

Sadoway’s liquid metal battery

by

9

The Sun’s energy contribution to the Earth is more than enough than what would be necessary to power the modern world. But there are two technological hurdles to solar society. On one hand, solar panels need to be more efficient. On the other, solar energy is intermittent and human demand is not, which means that we need good batteries to store solar power when its available. But so far, our batteries aren’t so good.

Donald Sadoway and a group at MIT are currently working to fix the latter problem with liquid metal battery technology. Sadoway’s presentation is so impressive I couldn’t not share it. Can his team find the missing link to alternative energy?

JM Kincaid