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INTRODUCTION
SOLAR ENERGY
• The major sources of electrical energy in India are thermal and
hydroelectric power .
• We cannot depend on thermal or hydroelectric power beyond a limit,
because of the deficiency in fuel and water.
• One of the best remedy for this energy crisis is the utilization of renewable
energy sources.
• Solar energy is the most dependable source for renewable energy, as it is
readily available.
3. REFRIGERATION SYSTEM
The existing refrigerator uses mechanical parts and harmful gases for its
working.
Harmful gas makes to the harmful environment.
Mechanical parts suffers from wear and tear thus producing noise and
decrement in useful life time.
It is not portable and handy.
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4. AIM OF PROJECT
To design and implement a solar powered semiconductor refrigerator to cool
a required volume.
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1. SOLAR PV CELL
• A solar cell, or photovoltaic cell, is an electrical device that converts the
energy of light directly into electricity by the photovoltaic effect.
• We use an PV cell which is connected to the buck converter and the
microcontroller.
• The working principle of solar cell is based on solar photovoltaic effect.
• When the solar rays shine solar cell, it produces a photocurrent from the
N zone to the P zone.
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2. MICRO CONTROLLER
• The controller we use is PIC16F877A.
• The PIC16F877A features 256 bytes of EEPROM data memory.
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• As the voltage changes, the control loop senses the difference and the duty
cycle is varied by the microcontroller hence achieving maximum power point
• Pulse width modulation (PWM) is a powerful technique for controlling
analog circuits with a processor's digital outputs.
• PWM is employed in a wide variety of applications, ranging from
measurement and communications to power control and conversion.
3.PWM GENERATOR
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4. DC-DC BUCK CONVERTER
• The DC/DC converters are widely used in photovoltaic generating systems.
• It interface between the photovoltaic panel and the load.
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5. BATTERY
• Battery used is Lead acid battery to store the power extracted from solar cell.
• And to supply the power to peltier and microcontroller.
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6. PELTIER MODULE
• When the current flows through the junction that are formed by two different
conductors, the node of position will produce exothermic or endothermic
phenomenon, this is the Peltier effect.
• The basic component of semiconductor cooling device is the thermocouple,
that is a P-type semiconductor element and an N-type semiconductor element
connected into the thermocouple.
16. APPLICATION OF THE PROJECT
Can be used as portable refrigeration units.
Can be used in remote areas where the electricity is not available.
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17. TENTATIVE SCHEDULE OF PROJECT
Software simulation : January - 2nd 2016
Hardware Completion : January - 4th 2016
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18. REFERENCES
[1] Jinfa Qian, Yaping wang and Huixiang Qian, “Analysis of PV industry
development,” Electrical, pp: 1-4, January 2009.
[2] RuiDuan, “The characteristics and the status quo on solar semiconductor
refrigeration technology,” Journal of Shanghai Electric University, Vol. 25,
no.1, pp. 75-78, February 2009.
[3] W Stephen Woodward, North Carolina Chapel Hill, “Seebeck voltage by
sampling to achieve temperature precision control,” EDN China, pp. 70,
February 2009.
[4] Hui Zhang, Meihong Wang, Hong Wu and Jianxin Li. “Discussion
about Solar Semiconductor Refrigeration System,” Energy Research and
Utilization, pp. 26-28, May 2008.
[5] Feng Gao, “Decrypt the latest solar power generation,” Invention and
Innovation, pp. 53, January 2009.
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