7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 1/14

Peltier thermoelectricrefrigeration

Presented by:1. Shailesh Pande

2. Shubham Kumar

3. Sujit Kumar

4.  Ajit

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 2/14

What is it?

The thermoelectric effect isthe direct conversion of

temperature differences toelectric voltage or vice-versa.

The direction of heat flowcan be controlled bychanging polarity of the

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 3/14

INTRODUCTION

Refrigeration is the process of pumping heat energy out ofan insulated chamber in order to reduce the temperature of

the chamber below that of the surrounding air.

Thermoelectric refrigeration uses a principle called the

"PELTIER" effect to pump heat electronically.

This is a good project for anyone getting into mechanical or

wanting an idea for something cool. This project not very

expensive either.

The space inside the fridge is big enough for normal sized

cans, large cans, chocolate bars, carton drinks, or anything

else you might want.

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 4/14

Thermoelectric cooling uses the Peltiereffect to create a heat flux between the

 junction of two different types of

materials.

 A Peltier cooler, heater, or thermoelectric

heat pump is a solid-state active heat

pump which transfers heat from one side

of the device to the other, withconsumption of electrical energy,

depending on the direction of the current.

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 5/14

EXISTING SYSTEM Compressive Refrigeration

1) Refrigerant fluid is compressed (high pressure –  temperature increases)

2) Fluid flows through an expansion valve

into low pressure chamber (phase of

refrigerant also changes)

3) Coils absorb heat in the device

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 6/14

PROPOSED SYSTEM 

Thermoelectric Refrigeration (TER)

 A temperature difference between the junctions of two dissimilar metal wiresproduces a voltage potential (known as

the Seebeck Effect) Peltier cooling forces heat flow from one

side to the other by applying an external

electric potential

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 7/14

Why does this Effect Occur?

Charge Carrier Diffusion and PhononDrag

Seebeck Effect Peltier Effect

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 8/14

Thermoelectric Module

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 9/14

Thermoelectric Refrigeration

9

(1)

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 10/14

Applications

10

Water/Beer Cooler

Cooled

Car Seat

Electronic Cooling

Cryogenic IR Night Vision

Laser/OE Cooling

TE

Si bench

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 11/14

PROTOTYPE

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 12/14

 Applications Thermoelectric generator

Cooling Computers

Drink Coolers

Recharging Devices

Space Probes

Solar Power

Clothing

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 13/14

Features and advantages

7/21/2019 Petlier Fridge

http://slidepdf.com/reader/full/petlier-fridge 14/14

REFERENCES

Rockwood, Alan L. (1984). "Relationship ofthermoelectricity to electronic entropy". Phys. Rev. A 30 (5):

2843 –4. Bibcode 1984PhRvA..30.2843R.

doi:10.1103/PhysRevA.30.2843

Bar-Cohen, A., Solbrekken G. L., and Yazawa, K.(2005). Thermoelectric Powered Convective Cooling ofMicroprocessors. IEEE Transactions of AdvancedPackaging, 28(2).

CRC Handbook of Thermoelectrics, Introduction, Edited

by D.M. Rowe, CRC Press, 1995.

G. Jeffrey Snyder, Tristan Ursell. "Thermoelectricefficiency and compatibility" Physical Review Letters, Vol91 p. 148301 (2003)