1. GROUP MEMBERS
MASUK ALAM
FAIZAN ALAM
REHAN AHMAD KHAN
MOHD.IMRAN KHAN
MOHD.RIZVAN

2.  Solar adsorption refrigeration is an option
to overtake the drawbacks of the
conventional cooling system.
 Adsorption refrigeration system uses
adsorbent beds to adsorb and desorbs a
refrigerant to obtain cooling effect.
 Adsorption systems mainly use a natural
working fluid which have zero ozone
depletion potential.
 Inventors propose technologies to improve
adsorption system and make it become a
realistic alternative.

4.  ADSORBER
It is the prime device present in this refrigeration system
which is filled with the mixture of Adsorbent & Adsorbate.
 ADSORBENT
These are the substances used for adsorbing the
adsorbate. Eg- zeolite, silica gel, activated carbon, etc.
 ADSORBATE
These are the coolant or refrigerants which gets adsorb in
adsorbant and desorbs when heated. Eg- water, ammonia,
etc.

5. PHASE 1
Heating and
pressurization
The adsorbent temperature
increases, which induces a
pressure increase, from the
evaporation pressure up to
the condensation pressure.
This period is equivalent to
the "compression" phase in
compression cycles.

6. PHASE 2
Heating and desorption +
condensation
During this period, the adsorber
continues receiving heat while
being connected to the condenser,
which now superimposes its
pressure.
The adsorbent temperature
continues increasing, which
induces desorption of vapor. This
desorbed vapor is liquefied in the
condenser.
The condensation heat is released
to the second heat sink at
intermediate temperature.
This period is equivalent to the
"condensation" in compression
cycles.

7. PHASE 3
Cooling and
depressurization
During this period, the
adsorber releases heat while
being closed.
The adsorbent temperature
decreases, which induces the
pressure decrease from the
condensation pressure down
to the evaporation pressure.
This period is equivalent to
the "expansion" in compression
cycles.

8. PHASE 4
Cooling and adsorption
+ evaporation
During this period, the adsorber
continues releasing heat while
being connected to the
evaporator, which now
superimposes its pressure.
The adsorbent temperature
continues decreasing, which
induces adsorption of vapor. This
adsorbed vapour is evaporated in
the evaporator.
The evaporation heat is supplied
by the heat source at low
temperature.
This period is equivalent to the
"evaporation" in compression
cycles.

9.  Zeolite & water
 Silica gel & water
 Activated carbon & methanol
 Activate carbon & NH3
 We are intending to take silica gel and
water or zeolite and water, since they are
easily available and has got low cost.

11.  Since we are going to use only one adsorber
bed, the process of cooling will be
intermittent.
COMPONENT TECHNICAL SPECIFICATION
Condenser 200W, water cooled
Evaporator Material-Copper, 150W
Expansion Device Capillary tube
Adsorbent Bed Material- stainless steel
Solar Panels
Adsorbent Silica Gel
Adsorbate Water

12.  Consumes less energy
 no depletion of ozone Eco-friendly and
causes layer.
 Simplicity of construction.
 Lack of moving parts
 Simple control
 Quiet operation.
 No vibration
 Low operating cost

13.  Feasible arrangement of the components
 Assembly in small area.
 Increament of COP.
 To reduce manufacturing and operating
cost.
 Leak proof.
 To maintain pressure in the adsorber equal
to condensor pressure.

14.  For adsorption refrigeration system, significant
achievements have been obtained on the use of
various technologies to reduce the complexity of
system structure, initial cost, to increase the
system operation reliability as well as energy
performance.
 However, intensive research is still needed to:
 i) enhance the amount of recovered
thermal energy, without adding complexity into
the design and operation of system
 ii) optimize the recovered mass rate to
achieve the best effect.
 Applied material research could produce new
combined material in order to achieve a higher
SCP for adsorption refrigeration system

15. Thanks