Thermoelectric cooling uses the Peltier effect to create a heat flux between the junction of two different types of materials.

1. THERMOELECTRIC COOLER
DEBASIS MOHANTY
14020081

2. Thermoelectric cooling
 Thermoelectric cooling uses the Peltier effect to create a heat flux
between the junction of two different types of materials.

3. Peltier effect
 The Peltier effect is the presence of heating or cooling at an electrified junction of two
different conductors and is named after French physicist Jean Charles Athanase Peltier, who
discovered it in 1834. When a current is made to flow through a junction between two
conductors, A and B, heat may be generated or removed at the junction.

4. Thermoelectric effect
 The thermoelectric effect is the direct conversion of temperature differences to
electric voltage and vice versa. A thermoelectric device creates voltage when there is a
different temperature on each side. Conversely, when a voltage is applied to it, it
creates a temperature difference.
 This effect can be used to generate electricity, measure temperature or change the
temperature of objects. Because the direction of heating and cooling is determined by
the polarity of the applied voltage, thermoelectric devices can be used as temperature
controllers.

5. Thermoelectric effect

6. Thermoelectric cooling

7. Materials of choice for thermoelectricity

8. Advantages of thermoelectric cooling
 An interchange of heating and cooling process can be exercised just by reversing the polarity.
 The weight per unit registration is considerably lower than conventional refrigeration system.
 These units are much more flexible than conventional units.
 It can take over-load simply by increasing power input.
 Simple and fewer parts required.
 Suitable for low capacity.
 Can operate in any position.
 No moving parts; noiseless.
 No leakage problem
 Compact in size
 Very long life.
 More reliable.
 Easy control.

9. Disadvantages
 Advantageous only for unit smaller capacity
 More power is needed to run the system

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11. Applications for Thermoelectric
Coolers
 Applications for thermoelectric modules cover a wide spectrum of product areas. These include
equipment used by military, medical, industrial, consumer, scientific/laboratory, and
telecommunications organizations. Uses range from simple food and beverage coolers for an
afternoon picnic to extremely sophisticated temperature control systems in missiles and space
vehicles.
 thermoelectric coolers generally may be considered for applications that require heat removal ranging
from milliwatts up to several thousand watts. Most single-stage TE coolers, including both high and
low current modules, are capable of pumping a maximum of 3 to 6 watts per square centimeter (20 to
40 watts per square inch) of module surface area.

12. Typical applications for thermoelectric
modules include:
 Black box cooling
 Calorimeters
 Cold chambers
 Cold plates
 Compact heat exchangers
 Microprocessor cooling
 Refrigerators and on-board refrigeration systems (aircraft, automobile, boat, hotel,
insulin, portable/picnic, pharmaceutical, RV)

13. Thermoelectric
cooler
modules

14. Thermoelectric
cooler
CAR & CPU
Refrigeration

15. conclusion
LARGE THERMOELECTRIC SYSTEMS IN THE KILOWATT RANGE HAVE BEEN BUILT
IN THE PAST FOR SPECIALIZED APPLICATIONS SUCH AS COOLING WITHIN
SUBMARINES AND RAILROAD CARS. SYSTEMS OF THIS MAGNITUDE ARE NOW
PROVING QUITE VALUABLE IN APPLICATIONS SUCH AS SEMICONDUCTOR
MANUFACTURING LINES.

16. THANK YOU