Lecture 14A - Fuel Cells - Part 1

Lecture 14A - Fuel Cells - Part 1 - 4/11/11 ECE 4364/5374G:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
4/11/11 1 ECE 4364/5374G-14A (c) Saifur Rahman 1 Professor Saifur Rahman Electrical & Computer Engineering Dept. Virginia Tech ECE 4364/5374G: Alternate Energy Systems Lecture 14A: Fuel Cells – Part 1 ECE 4364/5374G-14A (c) Saifur Rahman 2 Chapter 14 – Fuel Cells • Fuel cells are an environmentally clean, quiet, and highly efficient method for generating electricity and heat from natural gas and other fuels. • They are vastly different from other power systems. A fuel cell is an electrochemical device that converts the chemical energy of a fuel directly to usable energy - electricity and heat - without combustion.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4/11/11 2 ECE 4364/5374G-14A (c) Saifur Rahman 3 • The fuel cell is an electrochemical device that converts chemical energy into usable electricity and heat without combustion as an intermediate step. Fuel cells are similar to batteries in that both produce a DC current by using an electrochemical process. Two electrodes, an anode and a cathode, are separated by an electrolyte. Like batteries, fuel cells are combined into groups, called stacks, to obtain a usable voltage and power output. Fuel Cell Defni4on ECE 4364/5374G-14A (c) Saifur Rahman 4 • The fuel cell works by processing a hydrogen-rich fuel - usually natural gas or methanol - into hydrogen, which, when combined with oxygen, produces electricity and water. • This is the reverse electrolysis process. Rather than burning the fuel, however, the fuel cell converts the fuel to electricity using a highly efficient electrochemical process. A fuel cell has few moving parts, and produces very little waste heat or gas. Fuel Cell Opera4on
Background image of page 2
3 ECE 4364/5374G-14A (c) Saifur Rahman 5 The fuel cell is an electrochemical device that converts chemical energy into usable electricity and heat without combustion as an intermediate step. Fuel cells are similar to batteries in that both produce a DC current by using an electrochemical process. Two electrodes, an anode and a cathode, are separated by an electrolyte. Like batteries, fuel cells are combined into groups, called stacks, to obtain a usable voltage and power output. Fuel Cell – Electrochemical Opera4on ECE 4364/5374G-14A (c) Saifur Rahman 6 Fuel cells are the ideal technology for small power plants (0.2 to 20 megawatts [MW], serving an emerging distributed generation market and larger advanced, ultra-high efficiency fuel cell/gas turbine sizes (1-100+MW) serving industrial and new, more central, or repowering units. Fuel Cell Market
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/16/2012 for the course ECE 5374G taught by Professor Srahman during the Spring '12 term at Virginia Tech.

Page1 / 13

Lecture 14A - Fuel Cells - Part 1 - 4/11/11 ECE 4364/5374G:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online