Login | Signup now       

Guest

 Click to see how  

HOME | VIDEOS | DOCUMENTS | COLLECTIONS | UPLOAD | BROADCAST | MY ACCOUNT | FEEDBACK | ABOUT

Share  Title: Solid Oxide Fuel Cells

 
iConnect (Beta)   |  Like   |    Sponsor  |   Comment   |    Report  

Related Profiles

If you are an author or an inventor or an individual related to the work displayed in this video, you can click on the 'add me as' button to link your researchusa profile to this entry. Doing so automatically puts you on the iConnect network bringing great visibility to all your related work.

    
 
Article

View Cross Ref (Beta)

Your Edit is Valuable. Editor's names show on Edit pannel.Edit this article  

 

A solid oxide fuel cell (SOFC) is an electrochemical conversion device that produces electricity directly from fuel. Fuel cells are characterized by their electrolyte material and, as the name implies, the SOFC has a solid oxide, or ceramic, electrolyte. Ceramic fuel cells operate at much higher temperatures than polymer based ones.

Solid oxide fuel cells are intended mainly for stationary applications with an output from 100 W to 2 MW. They work at very high temperatures, typically between 700 and 1,000°C. Their off-gases can be used to fire a secondary gas turbine to improve electrical efficiency. This enables efficiency to reach as much as 90% in these hybrid systems, called combined heat and power (CHP) device. In these cells, oxygen ions are transferred through a solid oxide electrolyte material at high temperature to react with hydrogen on the anode side.

Due to the high operating temperature of SOFC's, they have no need for expensive catalyst, which is the case of proton-exchange fuel cells (platinum) and most other types of low temperature fuel cells. This means that SOFC's do not get poisoned by carbon monoxide and this makes them highly fuel-flexible. Solid oxide fuel cells have so far been operated on methane, propane, butane, fermentation gas, gasified biomass and paint fumes. However, sulfur components present in the fuel must be removed before entering the cell, but this can easily be done by an activated carbon bed or a zinc absorbent.

Thermal expansion demands a uniform and slow heating process at startup. Typically, 8 hours or more are to be expected. Micro-tubular geometries promise much faster start up times, typically on the order of minutes.[1]

Unlike most other types of fuel cells, SOFC's can have multiple geometries. The planar geometry is the typical sandwich type geometry employed by most types of fuel cells, where the electrolyte is sandwiched in between the electrodes. SOFC's can also be made in tubular geometries where either air or fuel is passed through the inside of the tube and the other gas is passed along the outside of the tube. The tubular design is advantageous because it is much easier to seal and separate the fuel from the air compared to the planar design. The performance of the planar design is currently better than the performance of the tubular design however, because the planar design has a lower resistance compared to the tubular design. Other geometries of SOFC's include modified planar cells (MPC or MPSOFC), where a wave-like structure replaces the traditional flat configuration of the planar cell. Such designs are highly promising, because they share the advantages of both planar cells (low resistance) and tubular cells (easier sealing).[2]

http://en.wikipedia.org/wiki/Solid_oxide_fuel_cell

 

 
Related Documents
The Combustion of Aluminum in Solid Rocket Propellants
The Role of Density Gradient in Liquid Rocket Engine Combustion Instability
Plasma Physics
Metro Station Complex- A Public Realm
Sustainable Energy Production and Utilization In Semi-rural Arizona
Integrated Approach to Value Management and Sustainable Construction in Indian Construction Industry
 
Member Documents
Hydrogen sensors based on titania nano-tubes
Plasma Wind Tunnels
Temperature measurements during Reentry
Coefficient of Thermal Expansion and Thermal Shock Parameter
Sustainable Energy Production and Utilization In Semi-rural Arizona
 

Keywords
fuel  cells  solid  oxide  energy  
 
 About This Video
 
 Subject Energy
 Category White Board
 Duration 00:09:12
 Views 3593
 Added 18-11-07
 Contributor    sidpatel
 Add to Favourites
 Report Abuse
 
 Related Videos
 See More

Hydrogen

 RunTime  00:03:42
 Uploaded  26-12-07
 Views  3732
   
 Hydrogen Fuel Cell

Fuel

 RunTime  00:07:02
 Uploaded  28-10-07
 Views  3719
   
 Fuel Cells

Stem

 RunTime  00:00:02
 Uploaded  30-10-07
 Views  3490
   
 Stem Cells

Cell

 RunTime  00:02:59
 Uploaded  17-04-08
 Views  3730
   
 Cell Mechanics, A Case St...

Cell

 RunTime  00:00:02
 Uploaded  31-10-07
 Views  3683
   
 Cell division on contrast...

Stem

 RunTime  00:09:00
 Uploaded  08-01-08
 Views  3242
   
 Stem Cell Research Docume...

Cellular

 RunTime  00:00:02
 Uploaded  31-10-07
 Views  3260
   
 Cellular Division

Kettering

 RunTime  00:00:02
 Uploaded  22-11-07
 Views  3469
   
 Kettering University - Me...

Stem

 RunTime  00:59:27
 Uploaded  20-12-07
 Views  3780
   
 Stem Cells: The Brain's B...

Why

 RunTime  00:18:59
 Uploaded  02-03-10
 Views  3457
   
 Why Open Access Is So Imp...

Blood:

 RunTime  00:00:02
 Uploaded  01-11-07
 Views  4545
   
 Blood: Path of a Red Bloo...

The

 RunTime  00:02:50
 Uploaded  27-11-07
 Views  4584
   
 The wonders of a tiny cel...

Sound

 RunTime  00:03:31
 Uploaded  25-08-09
 Views  3970
   
 Sound Propagation in Vacu...

Customized

 RunTime  00:03:39
 Uploaded  27-12-07
 Views  3744
   
 Customized Y-Shaped Nanot...

Live

 RunTime  00:05:25
 Uploaded  27-11-07
 Views  3632
   
 Live Cell Video Microscop...

Sound,

 RunTime  00:04:58
 Uploaded  25-11-07
 Views  3539
   
 Sound, Vision & Nanoscien...

Excel

 RunTime  00:09:28
 Uploaded  26-12-07
 Views  3649
   
 Excel Spread Sheet Basics...

Aerodynamics

 RunTime  00:00:02
 Uploaded  19-10-07
 Views  3703
   
 Aerodynamics

 Member Videos
 See More

Hydrogen

 RunTime  00:03:42
 Uploaded  26-12-07
 Views  3732
   
 Hydrogen Fuel Cell

Fuel

 RunTime  00:07:02
 Uploaded  28-10-07
 Views  3719
   
 Fuel Cells

Solid

 RunTime  00:09:12
 Uploaded  18-11-07
 Views  3594
   
 Solid Oxide Fuel Cells

Cardio-Vasular

 RunTime  00:46:37
 Uploaded  04-08-08
 Views  3541
   
 Cardio-Vasular Tissue Bio...

Ruben's

 RunTime  00:02:48
 Uploaded  25-11-07
 Views  3518
   
 Ruben's Tube

Cherry

 RunTime  00:00:29
 Uploaded  13-04-08
 Views  3398
   
 Cherry Blossom Festival

Solar

 RunTime  00:31:10
 Uploaded  12-08-08
 Views  3363
   
 Solar Hybrid Power Plant

Physics

 RunTime  00:02:52
 Uploaded  26-12-07
 Views  3232
   
 Physics of Fluids - Waves...

Robotic

 RunTime  00:02:21
 Uploaded  24-02-08
 Views  3091
   
 Robotic Arm Demo

Statistical

 RunTime  00:08:08
 Uploaded  26-12-07
 Views  3081
   
 Statistical Thermodynamic...

 

 

Comments | Queries | Clarifications