1. THE STUDY OF SOLAR-WIND HYBRID SYSTEM PH301 RENEWABLE ENERGY
ELVIN RITESH LAL S

2. AIM
Design solar-wind hybrid system for four flat house(2 x 2 bedroom, 2 x 3 bedroom)
Determination of capital cost and compare price of FEA
Understanding the working of hybrid system

3. INTRODUCTION
Hybrid power system – combination of two or more energy conversion device integrated to overcome the limitations that may inherent in either.
System efficiency of hybrid system > individual technology.
Hybrid approach overcomes the problem of lack of wind or sunlight.
Solar wind hybrid system offers more reliable approach to year round electricity production.
www1.eere.energy.gov/.../residential/wind.html

4. ADVANTAGES OF HYBRID SYSTEM
Environmental protection – reduction of CO2
Low cost – compared with nuclear coal and gas, possibly, considering future cost trends for fossil and nuclear energy
Diversity and security of supply
Rapid development – quick to install
Predictable cost - not influenced by fuel fluctuation

5. BASIC PRINCIPALS USED IN DESIGNING THE SYSTEM
Location chosen
Data obtained
Load calculated
Data analyzed and input to HOMER

6. FACTORS AFFECTING OUTPUT
SOLAR PANELS
Standard Temperature Conditions (STC)
Temperature
Dirt and Dust
Mismatch and Wiring loss
DC to AC conversion

7. SITE LOCATION Northern boundary -18
Western Boundary Center Eastern Boundary
Latitude
Longitude
Southern Boundary
-19

8. PLAN

9. RESULTS DAILY LOAD CALCULATION CONDITIONS DC bus voltage +48 V
Inverter losses 20 %
Battery losses 16.5%
Cabling losses 2.5 %

10. Appliances. Number of appliance. Power demand (W) Av. daily Duty
Appliances Number of appliance Power demand (W) Av.daily Duty cycle (h/day)
Fluorescent lights (2ft)
Fluorescent lights (4ft)
Light bulb
Ceiling fan
Ceiling exhaust fan
Television
Refrigerator
Iron
Radio-stereo
Vacuum cleaner
Computer
___________________________________________________________________________________________
TOTAL

11. Seasonal load profile

12. RESOURCE ASSESMENT ANALYSIS
Monthly Average Daily Air Temperatures at the Site
Monthly average Isolation on a horizontal surface (kWh/m2/day)

13. Graph of solar radiation and solar index
Hourly solar data for site entered and Homer calculated clearness index

14. Screenshot-global horizontal solar radiation daily profile

15. Wind potential and mean wind speed
Wind speed varies with the height, thus speed at the hub of turbine differs
extrapolation of wind speed at required heights
Monthly average wind speed at different heights

16. HOMER – software simulation output
The search space shows a list of different components sizes used by homer for analysis, different configuration of pv array and generic 10kW turbine

17. PV input to the system Solar panel price 0.125kW - $2000
(CBS powersolution)
Life time of 20 years
Different sizes were taken into consideration
Cost curve obtained

18. Wind resource input Wind data provided to HOMER
HOMER calculated and estimated the annual wind speed

19. Optimized configration
HOMER-output
Homer carried more than 150 simulation and provided the best system design as shown.
Optimized configration
Homer output consists of ;
peak power rating of PV module,
number of turbines (generic 10kW),
number of batteries,
converter size,
COE,
capacity shortage .

20. PV property DC wind turbine-Generic 10kW

21. Monthly average Electric Production
Estimated Annual Energy Produced by Hybrid Excess and Unmet load of the Hybrid System

22. PV output
Transient output from PV module shows max power produced is 100W though its 120W module

23. Generic 10kW output

24. battery Battery stays fully charged most of the year
However, during months of low production from hybrid the SOC raches 30%
Depth of charge for lead acid battery can be 80% and 20% charge remaining.
Monthly statistic of percentage SOC

25. Battery properties

26. converter System uses 10kW converter with max load of 9.9 kW
Energy in 22,622 kWh/year
Energy out kW/hr
Total loss of energy by converter is 2,262
graph of inverter output

27. Cost analysis Net present cost estimated by homer is $443,446
Levelized cost of energy is $1.704 / kWh
Operating cost $19,435

28. Net present cost
Annualized cost

29. conclusion
COE = total life time / (life time of system x annual energy production)
Cost of energy of hybrid system = $1.704
FEA = $0.2059
The difference in the price suggests that its not economically practical to use solar hybrid system.
But keeping in mind the remote locations, smaller islands of Fiji who do not have access to grid and due to high cost of energy, it might be given as an alternative
FEA’s increasing fuel and surcharge

30. THE END