This is project on green computing. Here we have shown earthen refrigerator

1. Energy Efficient Cooling :
Refrigerator
Presentation By :-
Sneha Sanjay Rajeshirke (Roll no. 82)
Swina Mahendra Rane (Roll no. 83)

2. Content
 Introduction
 Production
 Functionality
 Usage hints
 Refrigerator VS
Clay pot cooler

3. About
 The refrigerator has become one of the most essential equipment in
majority of the kitchens all over the world .
 Refrigerator consumes a lot of electricity and also emits greenhouse
gases and chemicals which are harmful to the environment .
 Around 10% of global CO2 emissions. That is three times the
amount produced by aviation and shipping combined.
 A typical fridge can contain between 0.05kg and 0.25kg of
refrigerant
 Disposing of old fridges and freezers in the wrong way can have a
huge impact on the climate

4. The HFC refrigerants used in fridges absorb infrared
radiation, making them potent greenhouse gases
(Credit: Javier Hirschfeld/Getty Images)

5. Introduction
 The clay pot cooler is a simple and cheap way to keep
food fresh (notably vegetables and fruits).
 The cooling function is based on the principle of
evaporative cooling and is working best in hot and dry
climates. In hot and dry climates , with daily maximum
air temperatures of 30 to 45°C this system of
evaporative cooling enables to reach temperatures
between 13 and 22°C inside the cooler.
 The clay pot cooler can extend the shelf life of food by
three to four times.

6. Objective
 Saving electricity
 Reduce the use of hazardous materials
 explore the benefits of practices from the past
 Simple and Inexpensive
 To design a refrigerator which will serve its actual purpose
of storing and preserving food but will be different than
existing refrigerators in terms of energy consumption and
health benefits.

8. Production
 You need two fired clay pots with different sizes ,
so that the smaller one can be placed into the
bigger one.
 Getting the right materials on the spot,
manufacturing the clay pots and firing them,
requires a lot of expertise and local knowledge.
Therefore we recommend producing the clay pots
in collaboration with experienced potters.

10. Production
 The space between the two clay pots is filled with
sand. A layer of sand is filled in the bottom of the
large clay pot, for the small pot to sit on
Subsequently .
 During this procedure, ensure that the inner pot
stays exactly in the middle of the outer pot so that
the distance between the two pots is identical in all
directions.

12. Functionality
.
 The basic principle for the functioning of the clay pot cooler is the principle of
evaporative cooling.
 The evaporation of water requires energy which is taken from the ambient air
leading to a fall in air temperature.
 This sand is watered and subsequently the opening of the small clay pot should be
covered with a wet cloth.
 Due to the porosity of fired clay, a part of the water can diffuse through the clay
end evaporate on the outside. This process consumes thermal energy from inside
of clay pot cooler and decreases the temperature inside clay pot

14. Usage Hints
Place of use
Regular Irrigation
Covering
Hygiene

15. Difference Between Modern
Refrigerator and Clay pot cooler
Modern Refrigerator
▪ Requires electricity and hence,
electricity bill .
▪ Expensive
▪ Does not promote healthy habits
and lifestyle .
▪ Does not naturally restores taste
of fruits and vegetables
▪ Emits greenhouse gases and other
harmful chemicals.
Clay Pot Cooler
▪ Does not require electricity
hence no electricity bill
▪ Affordable
▪ Promotes healthy habits and
lifestyle.
▪ Restores natural taste of fruits
and vegetables.
▪ Pollution free

16. THANKS !