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matthew ricciardelli

HowStuffWorks "How Fuel Cells Work" - 1 views

auto.howstuffworks.com/...fuel-cell.htm

shared by matthew ricciardelli on 19 Mar 14 - Cached
  • If you want to be technical about it, a fuel cell is an electrochemical energy conversion device. A fuel cell converts the chemicals hydrogen and oxygen into water, and in the process it produces electricity.
  • The other electrochemical device that we are all familiar with is the battery.
  • With a fuel cell, chemicals constantly flow into the cell so it never goes dead -- as long as there is a flow of chemicals into the cell, the electricity flows out of the cell. Most fuel cells in use today use hydrogen and oxygen as the chemicals.
Nick Waters

PROS - 0 views

www.hydrogen-fuelcells.com/...-fuel-cells-pros-and-cons.html

advantages informative fuel cell hydrogen energy

shared by Nick Waters on 19 Mar 14 - No Cached
  • Nick Waters on 19 Mar 14
     
    Hydrogen fuel cells pros Eliminates greenhouse gases if the hydrogen used comes from electrolysis of water Eliminates pollution caused by burning fossil fuels, the only by product is water Have a higher efficiency than diesel or gas engines Eliminates economic dependence on politically unstable countries for fossil fuel Some have low heat transmission-ideal for military applications Most operate silently compared to internal combustion engines Maintenance is simple since there are few moving parts in the system Operating times are much longer than with batteries
Alejandro Garcia

HowStuffWorks "What are the pros and cons of hydrogen energy?" - 1 views

science.howstuffworks.com/...nd-cons-of-hydrogen-energy.htm

fuel energy cells hydrogen

shared by Alejandro Garcia on 19 Mar 14 - No Cached
  • Producing hydrogen fuel cells doesn't release pollution either, provided that renewable sources such as water or solar energy are used in the production process.
  • Producing hydrogen fuel cells doesn't release pollution either, provided that renewable sources such as water or solar energy are used in the production process.
  • Producing hydrogen fuel cells doesn't release pollution either, provided that renewable sources such as water or solar energy are used in the production process.
  • Alejandro Garcia on 19 Mar 14
     
    One hope for our energy future lies in hydrogen -- an infinitely renewable and relatively pollution-free fuel that scientists and politicians alike see as a viable alternative to fossil fuels. Producing hydrogen fuel cells doesn't release pollution either, provided that renewable sources such as water or solar energy are used in the production process. 
Alisha Patel

What Are Fuel Cells Used for - Ask.com - 0 views

www.ask.com/...what-are-fuel-cells-used-for

fuel cells

shared by Alisha Patel on 19 Mar 14 - No Cached
  • Fuel cells are a type of battery that runs from an external fuel source. They are used for power in remote areas and as emergency backup power. Fuel cells are being used in transportation vehicles, hybrid cars, boats and race cars. The fuel cell is also used in technology such as cell phones, laptops and PDAs. You can find more information here:
  • Fuel cells are a type of battery that runs from an external fuel source. They are used for power in remote areas and as emergency backup power.
  • Cole Carpenter on 19 Mar 14
     
    "Fuel cells are a type of battery that runs from an external fuel source. They are used for power in remote areas and as emergency backup power. Fuel cells are being used in transportation vehicles, hybrid cars, boats and race cars. The fuel cell is also used in technology such as cell phones, laptops and PDAs."
Max Benedetto

Fuel Cell Energy: Pros and Cons - 2 views

www.triplepundit.com/...fuel-cell-energy-pros-cons

informative energy fuel cell

shared by Max Benedetto on 19 Mar 14 - No Cached
  • High cost due to expensive materials like platinum
  • Robustness. Many are sensitive to temperature and contamination.
  • Durability, particularly at high temperatures.
  • ...3 more annotations...
  • Reliability still evolving.
  • Little (but growing) infrastructure for hydrogen delivery
  • Could become irrelevant if batteries got good enough
  • Cole Carpenter on 19 Mar 14
     
    "High cost due to expensive materials like platinum Requires fuel Reliability still evolving. Durability, particularly at high temperatures. Robustness. Many are sensitive to temperature and contamination. Hydrogen fuel not readily available Little (but growing) infrastructure for hydrogen delivery Safety concerns with hydrogen (though it is less dangerous than gasoline) Low density of fuel, compared to gasoline Could become irrelevant if batteries got good enough "
Joseph Drahos

Why fuel cells are not viable - 0 views

pec.putney.net/issue_detail.php

shared by Joseph Drahos on 19 Mar 14 - No Cached
  • Joseph Drahos on 19 Mar 14
     
    The reason that fuel cells are not viable is because unlike batteries fuel cells are not an energy source.
Ian Doin

Fuel Cells Information, Fuel Cells Facts, Fuel Cells Technology - National Geographic - 0 views

environment.nationalgeographic.com/...fuel-cell-profile

shared by Ian Doin on 19 Mar 14 - No Cached
  • Fuel cells have three main applications: transportation, portable uses, and stationary installations.
  • Fuel cells have strong benefits over conventional combustion-based technologies currently used in many power plants and cars.
  • According to many experts, we may soon find ourselves using fuel cells to generate electrical power for all sorts of devices we use every day. A fuel cell is a device that uses a source of fuel, such as hydrogen, and an oxidant to create electricity from an electrochemical process.
Maggie Borgos

Fuel cells: environmental friend or foe? - physicsworld.com - 0 views

physicsworld.com/...ls-environmental-friend-or-foe

shared by Maggie Borgos on 19 Mar 14 - No Cached
  • But a group of researchers in the US believes that fuel cells could themselves have a detrimental effect on the environment. Tracey Tromp and colleagues at the California Institute of Technology have used models of the atmosphere to show that the inevitable emissions produced by fuel cell technology could substantially damage the ozone layer
  • They say that if hydrogen fuel cells replaced all of today's oil and gas-based combustion technologies, such losses would double or even triple the total hydrogen deposited into the atmosphere at the Earth's surface.
Shaye Pustolka

What Is a Biofuel Cell? (with picture) - 0 views

www.wisegeek.com/what-is-a-biofuel-cell.htm

shared by Shaye Pustolka on 19 Mar 14 - No Cached
  • Shaye Pustolka on 19 Mar 14
     
    A biofuel cell is a device that uses biological materials to generate electricity in a direct way through redox reactions. This contrasts with conventional use of biofuels to generate electricity from the heat provided by combustion of the material. The principle behind biofuel cell technology is to mimic various natural processes that are used to produce energy within living organisms.
Julia Przybysz

http://www.fuelcellenergy.com/why-fuelcell-energy/why-fuel-cells/ - 0 views

Fuel cells make much more efficient use of fuels than other distributed generation technologies such as reciprocating engines and gas turbines, and generate virtually no pollution such as nitrogen ...

started by Julia Przybysz on 19 Mar 14 no follow-up yet
Rachel Spaulding

Types of Fuel Cells - 0 views

Polymer Electrolyte Membrane (PEM) Fuel Cells Direct Methanol Fuel Cells Alkaline Fuel Cells Phosphoric Acid Fuel Cells Molten Carbonate Fuel Cells Solid Oxide Fuel Cells Regenerative Fuel Cells

started by Rachel Spaulding on 19 Mar 14 no follow-up yet
Gianna Smith

How Do Fuel Cells Work? :: Education :: ChemistryViews - 0 views

www.chemistryviews.org/...How_Do_Fuel_Cells_Work.html

shared by Gianna Smith on 19 Mar 14 - No Cached
  • Fuel cells are electrochemical energy converters. They directly convert the energy of a chemical reaction into electrical energy – without a thermal-electric intermediate step.
Linus Sante

A Basic Overview of Fuel Cell Technology - 0 views

americanhistory.si.edu/...basics.htm

shared by Linus Sante on 19 Mar 14 - No Cached
  • There are several kinds of fuel cells, and each operates a bit differently. But in general terms, hydrogen atoms enter a fuel cell at the anode where a chemical reaction strips them of their electrons. The hydrogen atoms are now "ionized," and carry a positive electrical charge. The negatively charged electrons provide the current through wires to do work. If alternating current (AC) is needed, the DC output of the fuel cell must be routed through a conversion device called an inverter.
Nikolas Lamphear

A Basic Overview of Fuel Cell Technology - 1 views

americanhistory.si.edu/...basics.htm

shared by Nikolas Lamphear on 19 Mar 14 - Cached
  • A fuel cell is a device that generates electricity by a chemical reaction. Every fuel cell has two electrodes, one positive and one negative, called, respectively, the anode and cathode. The reactions that produce electricity take place at the electrodes.
  • generate electricity with very little pollution–much of the hydrogen and oxygen used in generating electricity ultimately combine to form a harmless byproduct
  • Every fuel cell also has an electrolyte, which carries electrically charged particles from one electrode to the other, and a catalyst, which speeds the reactions at the electrodes.
  • ...14 more annotations...
  • Hydrogen is the basic fuel, but fuel cells also require oxygen
  • As long as a fuel cell is supplied with hydrogen and oxygen, it will generate electricity.
  • hydrogen atoms enter a fuel cell at the anode where a chemical reaction strips them of their electrons. The hydrogen atoms are now "ionized," and carry a positive electrical charge. The negatively charged electrons provide the current through wires to do work. If alternating current (AC) is needed, the DC output of the fuel cell must be routed through a conversion device called an inverter.
  • Oxygen enters the fuel cell at the cathode and, in some cell types (like the one illustrated above), it there combines with electrons returning from the electrical circuit and hydrogen ions that have traveled through the electrolyte from the anode
  • A fuel cell is a device that generates electricity by a chemical reaction. Every fuel cell has two electrodes, one positive and one negative, called, respectively, the anode and cathode
  • Alkali fuel cells operate on compressed hydrogen and oxygen
  • Molten Carbonate fuel cells (MCFC) use high-temperature compounds of salt (like sodium or magnesium) carbonates (chemically, CO3) as the electrolyte.
  • Phosphoric Acid fuel cells (PAFC) use phosphoric acid as the electrolyte.
  • Proton Exchange Membrane (PEM) fuel cells work with a polymer electrolyte in the form of a thin, permeable sheet
  • Solid Oxide fuel cells (SOFC) use a hard, ceramic compound of metal (like calcium or zirconium) oxides (chemically, O2) as electrolyte
  • Oxygen enters the fuel cell at the cathode and, in some cell types (like the one illustrated above), it there combines with electrons returning from the electrical circuit and hydrogen ions that have traveled through the electrolyte from the anode
  • Oxygen enters the fuel cell at the cathode and, in some cell types (like the one illustrated above), it there combines with electrons returning from the electrical circuit and hydrogen ions that have traveled through the electrolyte from the anode
  • In other cell types the oxygen picks up electrons and then travels through the electrolyte to the anode, where it combines with hydrogen ions
  • . The electrolyte plays a key role. It m
  • Joseph Drahos on 19 Mar 14
     
    A fuel cell is a device that generates electricity by a chemical reaction.
Max Benedetto

Fuel cell - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/...Fuel_cell

informative energy fuel cells

shared by Max Benedetto on 19 Mar 14 - No Cached
  • A fuel cell system running on hydrogen can be compact and lightweight, and have no major moving parts. Because fuel cells have no moving parts and do not involve combustion, in ideal conditions they can achieve up to 99.9999% reliability.[61] This equates to less than one minute of downtime in a six-year period.[61]
Maggie Borgos

Fuel Cells - ICLEI Local Governments for Sustainability USA - 0 views

www.icleiusa.org/...fuel-cells

shared by Maggie Borgos on 19 Mar 14 - No Cached
  • However, in most cases, the hydrogen fuel used to power hydrogen fuel cells is produced from fossil fuels, thereby resulting in upstream emissions associated with the burning of the fossil fuels.
  • Reliance on Fossil Fuels:
  • Fuel cells are often not commercially viable without external funding sources since the technology is still in the research and development phase.
Josh Vogel

Fuel cells produce energy electrochemically - without combusting the fuel - 0 views

www.fuelcellenergy.com/...how-do-fuel-cells-work

shared by Josh Vogel on 19 Mar 14 - No Cached
  • Similar to a battery, a fuel cell is comprised of many individual cells that are grouped together to form a fuel cell stack. Each individual cell contains an anode, a cathode and an electrolyte layer. When a hydrogen-rich fuel such as clean natural gas or renewable biogas enters the fuel cell stack, it reacts electrochemically with oxygen (i.e. ambient air) to produce electric current, heat and water. While a typical battery has a fixed supply of energy, fuel cells continuously generate electricity as long as fuel is supplied.
  • Similar to a battery, a fuel cell is comprised of many individual cells that are grouped together to form a fuel cell stack. Each individual cell contains an anode, a cathode and an electrolyte layer. When a hydrogen-rich fuel such as clean natural gas or renewable biogas enters the fuel cell stack, it reacts electrochemically with oxygen (i.e. ambient air) to produce electric current, heat and water. While a typical battery has a fixed supply of energy, fuel cells continuously generate electricity as long as fuel is supplied.
  • Nicholas Fuller on 19 Mar 14
     
    Because there is no combusting of fuel, virtually no harmful emissions are generated by the fuel cells. This results in power production that is almost entirely absent of nitrogen oxide (NOx), sulfur dioxide (SOx) or particulate matter (PM).
  • Josh Vogel on 19 Mar 14
     
    Fuel cells cleanly and efficiently convert chemical energy from hydrogen-rich fuels into electrical power and usable high quality heat in an electrochemical process that is virtually absent of pollutants. Similar to a battery, a fuel cell is comprised of many individual cells that are grouped together to form a fuel cell stack. Each individual cell contains an anode, a cathode and an electrolyte layer. When a hydrogen-rich fuel such as clean natural gas or renewable biogas enters the fuel cell stack, it reacts electrochemically with oxygen (i.e. ambient air) to produce electric current, heat and water. While a typical battery has a fixed supply of energy, fuel cells continuously generate electricity as long as fuel is supplied.
Brett Champion

Fuel cell - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Fuel_cell

shared by Brett Champion on 19 Mar 14 - Cached
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen/air to sustain the chemical reaction; however, fuel cells can produce electricity continuously for as long as these inputs are supplied.
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen/air to sustain the chemical reaction; however, fuel cells can produce electricity continuously for as long as these inputs are supplied.
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen/air to sustain the chemical reaction; however, fuel cells can produce electricity continuously for as long as these inputs are supplied.
  • Cameron Bleibtrey on 19 Mar 14
     
    There are many types of fuel cells, but they all consist of an anode, a cathode and an electrolyte that allows charges to move between the two sides of the fuel cell. Electrons are drawn from the anode to the cathode through an external circuit, producing direct current electricity.
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