Download Implementing Thermoelectricity

IMPLEMENTING
THERMOELECTRICITY
ABDULRAHMAN FAKHROO
GINO RUMHEIN
THE ENERGY EPIDEMIC
• Global warming
• Fossil fuels are finite
• Solutions:
• New energy sources
• Refine the way we use energy
WHAT IS THERMOELECTRICITY?
• Thermoelectricity is in essence electric power
produced by a temperature gradient
• The Seebeck Effect
• Inverse of the Peltier Effect
THEORY
• Kelvin-Planck statement:
• Two temperature reservoirs needed
• Therefore, 100 percent efficiency is impossible
• Our aim:
• To recycle Qc
DIFFICULTIES
• Material that is thermally conductive but not
electrically conductive
• Seebeck coefficient of material must be high
• Seebeck coefficient:
• Measure of an induced electric voltage as a result of a
temperature difference across a material
• A measurement of the thermoelectric efficiency of
a material:
• 𝑍 = (𝑆 2 𝜎𝑇)/𝑘
BISMUTH TELLURIDE
• Many thermoelectric properties present
• Ideal for refrigeration and portable power
generation
• High Seebeck coefficient … which comes with a
price
CALCULATIONS
• A calculation of the voltage derived from a
temperature difference within a material can be
given by:
• V(t)=
𝑇2
(𝑆𝑎
𝑇1
𝑇 − 𝑆𝑏 (𝑇)) 𝑑𝑇
• Where S is the Seebeck coefficient given as a function of
temperature
APPLICATION
• Applying the thermo electric effect on daily
temperature gradients using Bismuth Telluride, can
we recycle the lost heat transfer of various
thermodynamic cycles?