DEPARTMENT OF MECHANICAL ENGINEERINGSESSION 2015-16A

Project Report OnSOLAR POWERED COMPRESSORLESS REFRIGERATOR SYSTEM

Submitted To Submitted By

Aditya SinghMr. Manoj kumar Akansh Shail (Assistant Prof. ME Department) Avdhesh Sharma Atul Sharma

Arun GangwarMr.Inayat Hussain(AssistantProf.MEDepartment

CERTIFICATE

This is to certify that the project report entitled Solar Powered Compressorless Refrigeration System submitted by Avdhesh Sharma, Arun Kumar Gangwar, Aditya Singh, AkanshShail, Atul Sharma in partialfulfilment of the requirement for the degree in Mechanical Engineering. in department of Mechanical Engineering from Invertis University, Bareilly, is a record ofthe candidates work carried out by them under my supervision. The matter embodied in this project elsewhere has not been submitted for the award of any degree.

GUIDE NAME HEAD OF DEPARTMENTMR.INAYAT HUSSAIN

MR.RAJEEV ARORA

MR.MANUJ KUMAR

ACKNOWLEDGEMENTApart from our efforts, the success of this project depends largely on the encouragement and guidelines of many others. We take this opportunity to express our gratitude to the people who have been instrumental in the successful completion of this project. First of all, we would like to thank God Almighty who made it possible for us to see through the turbulence and to set us in the right path.

We would like to show our greatest gratitude to Mr. Inayat Hussain and Mr.Manoj Kumar for his tremendous support, guidelines and help. We feel motivated and encouraged every time we meet him and ask him for help. Without his encouragement and guidance this project would not have materialized.

We would also like to thank,Mr.Rajeev Aroa (HOD of ME Department).

Finally, yet importantly, we would like to express our heartfelt thanks to our beloved

parents for their blessings and our friends/classmates for their help and wishes for the successful completion of this project .

Avdhesh Sharma

Aditya singh

Akansh Shail

Atul Sharma Arungangwar

ABSTRACT

This paper outlines the implementation of photovoltaic driven refrigerator cum heating system powered from solar panelswith a battery bank. Different from conventional refrigeration systems, thermoelectric refrigeration, based on the Peltiereffect, does not require any compressor, expansion valves, absorbers, condensers or solution pumps. Moreover, it does notrequire working fluids or any moving parts, which is friendly to the environment and results in an increase in reliability. Itsimply uses electrons rather than refrigerants as a heat carrier. Nowadays, thermoelectric refrigeration devices have a distinctplace in medical applications, electronic applications, scientific equipment and other applications, where a high-precisiontemperature- -control is essential We demonstrate a Novel, Refrigeration cum Heater utilizing 3 Thermoelectric (TE) modulesmounted around a load cabinet. The Performance of this model is Experimentally Evaluated with an Aluminium cabinet.The device is powered by a Non-conventional energy resource, here PV Cells. The cabinet can attain a temperature of about8C(min) till 200C(max).The difference between the existing methods and this model, is that a thermoelectric cooling system

refrigerates without use of mechanical devices(Conventional Condenser fins and Compressor) and without refrigeranttoo. Since the Peltier module is compact in size, a refrigeration or heating system can be designed according to the usersrequirements (in desired size and shape).Elements Used

IR Transmitters x 3

IR Receivers x 3

LED Red x 2

LED Green x 1

LED Yellow x 1

8bit Microcontroller i.e ATMEGA8 for processing

DC Motor x 1

IC L293D for Motor Driver Circuit

10K Preset (Variable Resistance)

10K x1 Resistance, 150R x1 Resistance

22pF x2 Capacitance, 1000uF x1 Capacitance

Crystal Oscillator 3.57 MHz

12V DC Adapter Socket

3 pin Connector

Heat Sink

7805 (5V Voltage Regulator)

6pin Power Switch

General Purpose PCB

Soldering Iron

IntroductionThe portable refrigeration unit design team collaborated to create an alternative energy powered absorption refrigerator. The design uses solar energy to power the unit, allowing it to be completely off of the electric grid.

The basic principle of an absorption refrigeration system is that it uses a source of heat to provide the energy needed to drive the cooling process. In a Platen-Munters gas absorption refrigerator liquid ammonia evaporates in the presence of hydrogen gas, providing the cooling. The now-gaseous ammonia is sent into a container holding water, which absorbs the ammonia. The water-ammonia solution is then directed past a heater, which boils ammonia gas out of the water-ammonia solution. The ammonia gas is then condensed into a liquid. The liquid ammonia is then sent back through the hydrogen gas, completing the cycle.

If solar power is used to provide heat to such a system, it may do so in two forms, thermal or photovoltaic. Solar thermal harnesses solar heat directly using focused mirrors to heat a transfer fluid. Solar photovoltaic uses solar panels that operate using the photo-electric effect to produce direct current (DC) electricity. This electricity can then be inverted to power AC electronics and can also be used to create heat via a resistive heat source.

The final system design for this project contained one absorption cycle refrigerator with an extra absorption cycle that was painted and mounted for explanation and educational use. A resistive heating wire made of nickel-chromium was used to generate the heat to make the cycle work, and the electricity to run this heater came from two 12V batteries via a control circuit. The batteries were charged through a charge controller from two, 135 watt photovoltaic panels that could be rotated to face the sun and various angles. This entire system was mounted on a wheeled cart for easy mobility and portability. This system consists of Embedded devices, Solar panel, Charger, Battery, Display,Analog to Digital Converter (ADC), Temperature sensor, Driver, Peltier Module, Temperature controlled chamber and Keypad. The solar panel is applied to convert the heat energy into electrical energy and it is fed to the charger, which is checked by the implanted system and the output of the charger is given to Battery to store the electric potential. Again the Battery voltage is given to the ADC, the ADC is used to measure the Battery voltage and converts it into a digital signal and given back to embedded system. When the level of the voltage decreased below a threshold value (