bonnet t fuel cell presentation final

7/30/2019 Bonnet t Fuel Cell Presentation Final

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Fuel CellTechnology

SHAILENDRA PRATAP SINGHEC-3rd YEAR (B)

0912731096


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What is a Fuel Cell? A Fuel Cell is an electrochemical device

that combines hydrogen and oxygen to

produce electricity, with water and heatas its by-product.


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Why is Fuel CellTechnology Important? Since conversion of the fuel to energy

takes place via an electrochemical

process, not combustion It is a clean, quiet and highly efficient

process- two to three times more efficient

than fuel burning.


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How does a Fuel Cellwork? A Fuel Cell consists of two catalyst

coated electrodes surrounding an

electrolyte One electrode is an anode and the other

is a cathode


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How does a Fuel Cellwork? The process begins when Hydrogen

molecules enter the anode

The catalyst coating separateshydrogens negatively charged electrons

from the positively charged protons


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How does a Fuel Cellwork? The electrolyte allows the protons to pass

through to the cathode, but not the

electrons Instead the electrons are directed

through an external circuit which creates

electrical current


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How does a Fuel Cellwork? While the electrons pass through the external

circuit, oxygen molecules pass through the

cathode There the oxygen and the protons combine

with the electrons after they have passed

through the external circuit

When the oxygen and the protons combinewith the electrons it produces water and heat


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How does a Fuel Cellwork?


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Major Types of Fuel Cells Proton Exchange Membrane

(PEM) This is the leading cell type for

passenger car application

Uses a polymer membrane asthe electrolyte

Operates at a relatively lowtemperature, about 175 degrees

Has a high power density, can

vary its output quickly and issuited for applications wherequick startup is required makingit popular for automobiles

Sensitive to fuel impurities


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Major Types of Fuel Cells Direct Methanol (a subset of PEM)

Expected efficiencies of 40% plus low operatingtemperatures between 120-190 degrees

Also uses a polymer membrane as the electrolyte Different from PEM because the anode catalyst is

able to draw hydrogen from methanol without areformer

Used more for small portable power applications,possibly cell phones and laptops


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Major Types of Fuel Cells Solid Oxide

Uses a hard, non-porousceramic compound as theelectrolyte

Can reach 60% power-generating efficiency

Operates at extremely hightemperatures 1800 degrees

Used mainly for large, high

powered applications such asindustrial generating stations,mainly because it requiressuch high temperatures


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Major Types of Fuel Cells Regenerative Fuel Cells

Currently researched by NASA

This type of fuel cell involves a closed loop form of

power generation Uses solar energy to separate water into hydrogen

and oxygen

Hydrogen and oxygen are fed into the fuel cell

generating electricity, heat and water The water byproduct is then recirculated back to the

solar-powered electrolyser beginning the processagain


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How can Fuel Celltechnology be used? Transportation

Stationary Power Stations

Telecommunications

Micro Power


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How can Fuel Cell technologybe used? Transportation

All major automakers areworking to commercialize a fuelcell car

Automakers and expertsspeculate that a fuel cell vehiclewill be commercialized by 2010

50 fuel cell buses are currently inuse in North and South America,

Europe, Asia and Australia Trains, planes, boats, scooters,

forklifts and even bicycles areutilizing fuel cell technology aswell


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How can Fuel Cell technologybe used? Stationary Power Stations

Over 2,500 fuel cell systems have beeninstalled all over the world in hospitals,nursing homes, hotels, office buildings,schools and utility power plants

Most of these systems are either connectedto the electric grid to provide supplementalpower and backup assurance or as a grid-independent generator for locations that areinaccessible by power lines


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How can Fuel Cell technologybe used? Telecommunications

Due to computers, the Internet and

sophisticated communication networks thereis a need for an incredibly reliable power

source

Fuel Cells have been proven to be 99.999%

reliable


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How can Fuel Cell technologybe used? Micro Power

Consumer electronics

could gain drastically

longer battery power withFuel Cell technology

Cell phones can be

powered for 30 days

without recharging

Laptops can be poweredfor 20 hours without

recharging


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What are the benefits of FuelCell technology? Physical Security

Reliability

Efficiency

Environmental Benefits

Battery Replacement/Alternative

Military Applications


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Conclusion Promising technology

Most viable for niche market use in the

near future Widespread marketplace acceptance and

use is still many years away

bonnet t fuel cell presentation final

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