Hydrogen Fuel Cell Quotes

I thought I was far enough from the explosion but no, not even close. Chunks of twisted metal bashed my boulder while smaller bits of wreckage rained from above. “Oh, right,” I said. I’d forgotten to account for the other explosive in there: the hydrogen fuel-cell battery. All that hydrogen had met the oxygen at high temperature and they’d had a brief chat.

For unknown ages after the explosive outpouring of matter and energy of the Big Bang, the Cosmos was without form. There were no galaxies, no planets, no life. Deep, impenetrable darkness was everywhere, hydrogen atoms in the void. Here and there, denser accumulations of gas were imperceptibly growing, globes of matter were condensing-hydrogen raindrops more massive than suns. Within these globes of gas was kindled the nuclear fire latent in matter. A first generation of stars was born, flooding the Cosmos with light. There were in those times, not yet any planets to receive the light, no living creatures to admire the radiance of the heavens. Deep in the stellar furnaces, the alchemy of nuclear fusion created heavy elements from the ashes of hydrogen burning, the atomic building blocks of future planets and lifeforms. Massive stars soon exhausted their stores of nuclear fuel. Rocked by colossal explosions, they returned most of their substance back into the thin gas from which they had once condensed. Here in the dark lush clouds between the stars, new raindrops made of many elements were forming, later generation of stars being born. Nearby, smaller raindrops grew, bodies far too little to ignite the nuclear fire, droplets in the interstellar mist on their way to form planets. Among them was a small world of stone and iron, the early Earth. Congealing and warming, the Earth released methane, ammonia, water and hydrogen gases that had been trapped within, forming the primitive atmosphere and the first oceans. Starlight from the Sun bathed and warmed the primeval Earth, drove storms, generated lightning and thunder. Volcanoes overflowed with lava. These processes disrupted molecules of the primitive atmosphere; the fragments fell back together into more and more complex forms, which dissolved into the early oceans. After a while the seas achieved the consistency of a warm, dilute soup. Molecules were organized, and complex chemical reactions driven, on the surface of clay. And one day a molecule arose that quite by accident was able to make crude copies of itself out of the other molecules in the broth. As time passed, more elaborate and more accurate self replicating molecules arose. Those combinations best suited to further replication were favored by the sieve of natural selection. Those that copied better produced more copies. And the primitive oceanic broth gradually grew thin as it was consumed by and transformed into complex condensations of self replicating organic molecules. Gradually, imperceptibly, life had begun. Single-celled plants evolved, and life began generating its own food. Photosynthesis transformed the atmosphere. Sex was invented. Once free living forms bonded together to make a complex cell with specialized functions. Chemical receptors evolved, and the Cosmos could taste and smell. One celled organisms evolved into multicellular colonies, elaborating their various parts into specialized organ systems. Eyes and ears evolved, and now the Cosmos could see and hear. Plants and animals discovered that land could support life. Organisms buzzed, crawled, scuttled, lumbered, glided, flapped, shimmied, climbed and soared. Colossal beasts thundered through steaming jungles. Small creatures emerged, born live instead of in hard-shelled containers, with a fluid like the early ocean coursing through their veins. They survived by swiftness and cunning. And then, only a moment ago, some small arboreal animals scampered down from the trees. They became upright and taught themselves the use of tools, domesticated other animals, plants and fire, and devised language. The ash of stellar alchemy was now emerging into consciousness. At an ever-accelerating pace, it invented writing, cities, art and science, and sent spaceships to the planets and the stars. These are some of the things that hydrogen atoms do, given fifteen billion years of cosmic evolution.

hold. That’s because each pillar can only function in relationship to the others. The five pillars of the Third Industrial Revolution are (1) shifting to renewable energy; (2) transforming the building stock of every continent into micro–power plants to collect renewable energies on site; (3) deploying hydrogen and other storage technologies in every building and throughout the infrastructure to store intermittent energies; (4) using Internet technology to transform the power grid of every continent into an energy-sharing intergrid that acts just like the Internet (when millions of buildings are generating a small amount of energy locally, on site, they can sell surplus back to the grid and share electricity with their continental neighbors); and (5) transitioning the transport fleet to electric plug-in and fuel cell vehicles that can buy and sell electricity on a smart, continental, interactive power grid.

The explosion At first the crew thought a meteoroid had hit them. As well as the noise of an explosion, the electrics were going haywire and the attitude control thrusters had fired. In fact, a short circuit had ignited some insulation in the Number 2 oxygen tank of the Service Module. The Service Module provided life support, power and other systems to the Command Module, which held the astronauts as they travelled to and from lunar orbit. The Lunar Module was a separate, though connected, craft that would be used to ferry the men to the lunar surface and back. The fire caused a surge in pressure that ruptured the tank, flooding the fuel cell bay with gaseous oxygen. This surge blew the bolts holding on the outer panel, which tore off free and spun into space, damaging a communications antenna. Contact with Earth was lost for 1.8 seconds, until the system automatically switched to another antenna. The shock also ruptured a line from the Number 1 oxygen tank. Two hours later all of the Service Module’s oxygen supply had leaked into the void. As the Command Module’s fuel cells used oxygen with hydrogen to generate electricity, it could now only run on battery power. The crew had no option but to shut down the Command Module completely and move into the Lunar Module. They would then use this as a ‘lifeboat’ for the journey back to Earth before rejoining the Command Module for re-entry. As for the mission, the Service Module was so badly damaged that a safe return from a lunar landing was impossible. These men would not be landing on the Moon. 320,000 km from home The Flight Director immediately aborted the mission. Now he just had to get the men home. The quickest way would be a Direct Abort trajectory, using the Service Module engine to essentially reverse the craft. But it was too late:

Well,” Harry said, “look at it this way: Suppose you were an intelligent bacterium floating in space, and you came upon one of our communication satellites, in orbit around the Earth. You would think, What a strange, alien object this is, let’s explore it. Suppose you opened it up and crawled inside. You would find it very interesting in there, with lots of huge things to puzzle over. But eventually you might climb into one of the fuel cells, and the hydrogen would kill you. And your last thought would be: This alien device was obviously made to test bacterial intelligence and to kill us if we make a false step. “Now, that would be correct from the standpoint of the dying bacterium. But that wouldn’t be correct at all from the standpoint of the beings who made the satellite. From our point of view, the communications satellite has nothing to do with intelligent bacteria. We don’t even know that there are intelligent bacteria out there. We’re just trying to communicate, and we’ve made what we consider a quite ordinary device to do it.

2011, I led the Department of Energy’s Quadrennial Technology Review to develop strategies for government support of emerging clean energy technologies. In one town hall meeting, I faced advocates for four different vehicle technologies—internal combustion engines powered by biofuels, compressed natural gas, hydrogen-powered fuel cells, and battery-powered plug-ins. Each of them believed that their technology was the optimal vision for the future, and that all the government had to do was support the development of the appropriate fueling infrastructure. When I reminded them that the country could probably deploy no more than two new fueling technologies at scale, a squabble ensued. There are several reasons I believe that electricity will fuel the passenger vehicles of the future, but one of them is that the existing electrical grid is a good start on the fueling infrastructure. If a widespread transition to plug-in electric cars does come about, systems thinking will be even more important as the electrical and transportation systems would have to work together to accommodate charging millions of vehicles.

that we currently use in ICEs, we have to use hydrogen. I find this very disappointing as hydrogen can actually be used to fuel ICEs directly (and only emits water and trace amounts of nitrogen oxide from the exhaust), and as a fuel in fuel cells to generate electricity that powers the vehicle.