09-04-2011, 12:17 PM
Presented by:
Birendra kr. Pandey
[attachment=11917]
Alternative Energy: A Closer look at Hybrid Energy Systems using wind and solar sources.
Introduction
The demand for alternative energy sources is increasing each year due to need for clean and renewable sources of energy.
Hybrid energy systems are ideal for outdoor and/or remote area applications.
Overview: Wind/Solar Hybrid Systems
Background (cont.)
A hybrid energy system is a system that consist of two or more alternative energy sources (ex: solar and wind).
Hybrid energy systems are growing in popularity due to the reliability of stand alone solar or wind power sources.
Why Solar Energy.
Solar energy is the most readily available source of energy.
It is free.
It is also the most important of the non-conventional sources of energy because it is non-polluting.
How much solar energy?
Facts about solar energy.
Earth surface receives 1.2x1017 W of power from sun.
Energy supplied by the sun in one hour is almost equal to the amount energy required by the human population in one year.
Most if the other source on renewable energy have their in sun.
Solar cells Characteristics.
Isc-short circuit current.
Voc-open circuit voltage.
Peak power.
How solar cells Generate electricity
From Cells to Modules
The open circuit voltage of a single solar solar cell is approx 0.5V.
Much higher voltage voltage is required for practical application.
Solar cells are connected in series to increase its open circuit voltage.
Experimental Setup.
Conclusions
Temperature of the module is an important parameter. The power output of the module changes by about 0.5% for every degree rise in temperature. So a 38W module gives only a power of about 29W peak
The module placement also plays an important role in power output. Module is kept in south facing. Buts its elevation angle must be adjusted every month to get high power output.
Current Work
Determining if a hybrid system made up of solar and wind sources it more efficient that stand alone solar and wind sources.
Is thermoelectric refrigeration viable for outdoor/remote area applications?
Results
With direct light the solar panels produce an average of 19.26 V. The average current is 5.86 mA.
After twenty four hours the average voltage is 13.4. The average current is 0.9mA.
The current output for the turbine was 0.003mA. The wind turbine did not perform as desired and will be discussed in the future improvements section.
Overall the performance was great and this system could be a viable alternative energy option.
WIND POWER
What is it?
How does it work?
Efficiency
WIND POWER - What is it?
All renewable energy (except tidal and geothermal power), ultimately comes from the sun
The earth receives 1.74 x 1017 watts of power (per hour) from the sun
About one or 2 percent of this energy is converted to wind energy (which is about 50-100 times more than the energy converted to biomass by all plants on earth
Differential heating of the earth’s surface and atmosphere induces vertical and horizontal air currents that are affected by the earth’s rotation and contours of the land à WIND. ~ e.g.: Land Sea Breeze Cycle
WINDMILL DESIGN
Summary and Conclusion
The overall performance of the hybrid renewable energy system was as expected. We were able to determine that this system would be a viable source of power production for outdoor and remote area applications. Due to time constraints some additional alterations could not be made to the wind turbine in order to get optimal performance. If time were available for further alterations the size of the stepper motor used should have been increased. Further improvements that should be made are in the portabilit.
Birendra kr. Pandey
[attachment=11917]
Alternative Energy: A Closer look at Hybrid Energy Systems using wind and solar sources.
Introduction
The demand for alternative energy sources is increasing each year due to need for clean and renewable sources of energy.
Hybrid energy systems are ideal for outdoor and/or remote area applications.
Overview: Wind/Solar Hybrid Systems
Background (cont.)
A hybrid energy system is a system that consist of two or more alternative energy sources (ex: solar and wind).
Hybrid energy systems are growing in popularity due to the reliability of stand alone solar or wind power sources.
Why Solar Energy.
Solar energy is the most readily available source of energy.
It is free.
It is also the most important of the non-conventional sources of energy because it is non-polluting.
How much solar energy?
Facts about solar energy.
Earth surface receives 1.2x1017 W of power from sun.
Energy supplied by the sun in one hour is almost equal to the amount energy required by the human population in one year.
Most if the other source on renewable energy have their in sun.
Solar cells Characteristics.
Isc-short circuit current.
Voc-open circuit voltage.
Peak power.
How solar cells Generate electricity
From Cells to Modules
The open circuit voltage of a single solar solar cell is approx 0.5V.
Much higher voltage voltage is required for practical application.
Solar cells are connected in series to increase its open circuit voltage.
Experimental Setup.
Conclusions
Temperature of the module is an important parameter. The power output of the module changes by about 0.5% for every degree rise in temperature. So a 38W module gives only a power of about 29W peak
The module placement also plays an important role in power output. Module is kept in south facing. Buts its elevation angle must be adjusted every month to get high power output.
Current Work
Determining if a hybrid system made up of solar and wind sources it more efficient that stand alone solar and wind sources.
Is thermoelectric refrigeration viable for outdoor/remote area applications?
Results
With direct light the solar panels produce an average of 19.26 V. The average current is 5.86 mA.
After twenty four hours the average voltage is 13.4. The average current is 0.9mA.
The current output for the turbine was 0.003mA. The wind turbine did not perform as desired and will be discussed in the future improvements section.
Overall the performance was great and this system could be a viable alternative energy option.
WIND POWER
What is it?
How does it work?
Efficiency
WIND POWER - What is it?
All renewable energy (except tidal and geothermal power), ultimately comes from the sun
The earth receives 1.74 x 1017 watts of power (per hour) from the sun
About one or 2 percent of this energy is converted to wind energy (which is about 50-100 times more than the energy converted to biomass by all plants on earth
Differential heating of the earth’s surface and atmosphere induces vertical and horizontal air currents that are affected by the earth’s rotation and contours of the land à WIND. ~ e.g.: Land Sea Breeze Cycle
WINDMILL DESIGN
Summary and Conclusion
The overall performance of the hybrid renewable energy system was as expected. We were able to determine that this system would be a viable source of power production for outdoor and remote area applications. Due to time constraints some additional alterations could not be made to the wind turbine in order to get optimal performance. If time were available for further alterations the size of the stepper motor used should have been increased. Further improvements that should be made are in the portabilit.