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SIZING OF SOLAR PV SYSTEMS FOR OFFICE LIGHTING APPLICATIONS

This study examines the sizing of solar PV systems for office lighting applications based on solar radiation and energy requirements. Results show that optimum sizing can reduce overall costs and make the project more attractive. LED lighting systems were found to be economically viable and reduce the size of the PV system required.

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SIZING OF SOLAR PV SYSTEMS FOR OFFICE LIGHTING APPLICATIONS

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  1. SIZING OF SOLAR PV SYSTEMS FOR OFFICE LIGHTING APPLICATIONS Authors Rajashekar P. Mandi Udaykumar R. Yaragatti PRESENTER Arun Kumar Datta. Central Power Research Institute, Bhopal. 280 W solar PV plant is installed at CPRI

  2. Solar PV System GRID PV ARRAY POWER CONDITIONER INVERTER/ BATTERY CHARGER CONTROLLER AC DB DC DB Lamp load DB – Distribution Board PV – Photovoltaic BATTERY Figure 2: Schematic of Solar PV system

  3. Solar radiation

  4. Solar radiation

  5. Ambient Temperature

  6. PV Cell Temperature

  7. PV Cell Temperature

  8. Ambient Temperature

  9. PV Cell Efficiency

  10. PV Cell Efficiency

  11. Load pattern

  12. System sizing • Base solar photovoltaic panels & other accessories : Rs. 1,80,000 per kW • (without inverter & battery storage) • Grid – inverter power system (without battery banks) : Rs. 39,000 per kW • Battery size including charge controller for 1 hour autonomy : Rs. 13,500 per kWh

  13. Configuration

  14. Techno-economics for Scheme 1: 4.366 kWh/m2-day (during the month of July) Total Energy (TFL): 521 kWh/y Total Energy (LED): 193 kWh/y

  15. Techno-economics for Scheme 2: 6.739 kWh/m2-day (during the month of March) Total Energy (TFL): 521 kWh/y Total Energy (LED): 193 kWh/y

  16. Techno-economics for Scheme 3: 5.171 kWh/m2-day Total Energy (TFL): 521 kWh/y Total Energy (LED): 193 kWh/y

  17. INTEGRATION – I

  18. SCHEME – III : TFL

  19. SCHEME – III : LED

  20. SCHEME – III : LED

  21. Solar PV sizing

  22. Battery Bank sizing

  23. Results

  24. Results • Energy estimated (Solar PV) : 454 kWh/y (87.1 %) • Energy estimated (Grid) : 67 kWh/y (12.9 %) • Energy generated by solar PV : 403.7 kWh/y (92.25 %) • Energy import from grid : 33.9 kWh/y (7.75 %)

  25. CONCLUSIONS • Sizing of solar PV system with lowest monthly average daily solar radiation requires smaller size of PV but higher dependence on grid power. • Sizing of solar PV system with highest monthly average daily solar radiation requires higher size of PV but lower dependence on grid power and the overall cost will be high. • Optimum sizing of solar PV system will reduce the overall cost and project become more attractive. • Use of LED lamps for the office buildings reduce the specific size of solar PV system for the given illumination level output. • Installation of solar PV system with LED lighting system will be economically viable.

  26. Thank you CPRI Arun Kumar Datta. CPRI, Bhopal. email:rajashekarmandi@yahoo.com & mandi@cpri.in

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