ppt about design and fabrication of thermodynamic generator

1. PRIYADARSHINI INSTITUTE OF ENGINEERING AND
TECHNOLOGY
VIIITH SEM MECHANICAL ENGINEERING
Pesented By : Saloni Pophare
Abhay kumar
Sagar Kumar
Saiyed Kamran
Rahul Atram
Vaibhav Khobragade
Guided by : Dr A . P Kedar

2. TITLE : FABRICATION OF
THERMOELECTRIC GENERATOR

3. CONTENTS :
INTRODUCTION -
SEEBECK EFFECT -
PELTIER EFFECT -
THOMSON EFFECT -
THERMOELECTRIC MATERIALS -
ABOUT TEG MODULES -
PRINCIPLE & WORKING -
PROPOSED WORK -
DIAGRAM -
REFERENCE -

4. Introduction -
• In 1821, Thomas Johann Seebeck discovered that a thermal gradient
formed between two dissimilar conductors produces a voltage..
• In 1834, Jean Charles Athanase Peltier discovered the reverse effect,
that running an electric current through the junction of two dissimilar
conductors could, depending on the direction of the current, cause it to
act as a heater or cooler.
• In 1963, the first ATEG was built and reported by Neild et al.In 1988,
Birkholz et al. published the results of their work in collaboration with
Porsche.

5. LITERATURE REVIEW
• G. Fraisse, J. Ramousse, D. Sgorlon, C. Goupil : They analyze that simplified
models’ accuracy, with regards to the performance (COP, efficiency), the voltage–
current characteristics and the thermal/electrical power .(Energy conversion and
management )
• Mr. Satayu Travadi, Jaspalsinh Dabhi, This study investigated the role of the
dimensions of TEG, including the length, and cross-sectional area of the
thermoelements to evaluate the power and efficiency.They calculated the
thermoelectric power generated by the TEG and efficiency.(IJOSR)
• Rasit Ashika, Hayati Mamur, The structure of the tegs used in electrical energy
production have been reported.They concluded that conversion efficiency of te
modules used commercially is <= 10% (IJORER)

6. In 1821, thomas seebeck found that-when the function of two
difference metals are maintained at different temperatures the emf is
produced in the circuit.
S = dV/dT
S is the seebeck coefficient with units of volts per Kelvin
S is positive when the direction of electric current is same as the
direction of thermal current
SEEBECK EFFECT

7. -The good thermoelectric material should posses.
1. Large seebeck coefficients.
2. High electrical conductivity.
3. Low thermal conductivity.
EXAMPLES ARE-
Bismuth Telluride (Bi2Te3)
Silicon Germanium (SiGe)
Lead Telluride (PbTe)
Bismuth Antimony(Bi-Sb)
THERMOELECTRIC MATERIAL

8.  TEG module consisting of 126 Bi2Te3 p-type & n- type semiconductors couples.
 By connecting an electron conduction (n-type) & hole conducting (p-type) material in
series, a net voltage is produced that can be driven through a load.
 Module surface is flat plane with dimension 40x40mm & height 3-5mm.
TEG MODULES

9. In ATEGs, thermoelectric materials are packed between the hot-side and the cold-side heat
exchangers. The thermoelectric materials are made up of p-type and n-type semiconductor,
while the heat exchangers are metal plates with high thermal conductivity.
The temperature difference between the two surfaces of the thermoelectric module
generates electricity using the Seebeck Effect. When hot exhaust from the engine passes
through an exhaust ATEG, the charge carriers of the semiconductors within the generator
diffuse from the hot-side heat exchanger to the cold-side exchanger. The build-up of charge
carriers results in a net charge, producing an electrostatic potential while the heat transfer
drives a current. With exhaust temperatures of 700°C (~1300°F) or more, the temperature
difference between exhaust gas on the hot side and coolant on the cold side is several
hundred degrees
WORKING PRINCIPLE OF TEG

11. WATER
TANK
TEMPERATURE
DIGITALMETER
FASTENERSPAN
HEAT SOURCE
TEG MODULE
BATTERY VOLTMETER
WORKING MODEL
WATER INWATER
OUT

12. Sr.no Temp of hot
side(Th)
Temp of cold
side(Tc)
Tempdiffere
nce(Td)
Current in
mA
VOLTAGE
volts
1 70 30 40 1.3 1.42
2 78 28 50 1.5 1.6
3
4

13. APPLICATIONS
o The most common application is the use of thermoelectric generators on gas
pipelines. For example, for cathodic protection, radio communication, and other
telemetry. On gas pipelines for power consumption of up to 5 kW thermal
generators are preferable to other power sources. The manufacturers of generators
for gas pipelines are Global Thermoelectric (Calgary, Canada) and TELGEN
(Russia)
Many space probes, including the Mars Curiosity rover, generate electricity
using a thermoelectric generator whose heat source is a radioactive element.
For more details, see the article: Radioisotope thermoelectric generator
It is used in wrist watch.
It is use in cars so that waste heat liberates from the car engine comes in to
useful work.

14. REFERENCE
1. Rasit Ashika, Hayati Mamur, “A review : Thermoelectric generator in renewable
energy”, International Journal Of Renewable Energy Research, vol.4,1, 2014.
www.ijrer.org.
Mr. Satayu Travadi, Jaspalsing Dabhi, “Review on design and analytical model of
thermoelectric generator”, International Journal Of Scientific Research,
volume:2, issue:2, feb-2013, ISSN No-2277-8179, (Pg 143-146).
http://iosrjournals.org/iosr-jmce.html
1. G.Jeffrey Snyder, “ Small thermoelectric generators” The Electrochemical
Society Interface 2008.
https://www.electrochem.org/dl/interface/fal/fal08/fal08_p54-56.pdf

15. THANK YOU
clickhere