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Conducting a Site Assessment and PV System Field Survey

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Conducting a Site Assessment and PV System Field Survey
for designing PV engineers

Publicada em: Engenharia
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Conducting a Site Assessment and PV System Field Survey

  1. 1. 1.Training Course: Standalone Solar PV System Design, Installation for engineers BY Eng.Eyad Adnan https://www.linkedin.com/groups/12107513
  2. 2. • Goals of Course • Project Profile • PV sample Projects • Site Surveying - GPS coordination - Metro Geographical Data and analysis • Shading - Consideration - effects and treatments • PV system Field surveying
  3. 3. • To be familiar with Designing standalone PV grid • To prepare PV bidding, specification and BOQ • To get knowledge with off-grid solar power system • To specify the best brands for off grid solar components • To recognize the AUS/NZS and IEC standards • To simulate PV Grid by Pvsys software
  4. 4. • Profile Project or Size Project • client details: • Address project • Project Name • Contract, consulting and Owner companies • TOTAL POWER CAPACITY AND AREA
  5. 5. • DATA COLLECTION: 1. Solar Irradiation : to specify the total required PV to macth demand customer power 2. Location GPS : to orient PV panels and elevation angle for shading concern 3. PV panels mounting type 4.Any obstacles to avoid shading problems 4.Amobient condition for the sit location to check power grid losses /degrading temperature factor 5. Searching place and room for DC batteries , inverters and other equipment 6. Total available area and free spaces “m^2”
  6. 6.  What is Solar irradiation
  7. 7.  On-site Visit
  8. 8.  Roof types and site evaluation
  9. 9.  Site Assessment
  10. 10. • 1. Go to:https://www.gps-coordinates.net/
  11. 11. 2. Go to : https://eosweb.larc.nasa.gov/cgi- bin/sse/grid.cgi?email=luke.s@wildmail.com Daily, Monthly, annual averaged insolation incident on horizontal surface in kWh/m2/day Multi-year average of the temperature of the Earth's surface Average Air Temperature at Ten Meters Above the Surface of the Earth. Maximum Air Temperature at Ten Meters Above the Surface of the Earth. Minimum Air Temperature at Ten Meters Above the Surface of the Earth. Meteorological Data Assessment
  12. 12. Meteorological Data Assessment
  13. 13. Meteorological Data Assessment
  14. 14. Meteorological Data Assessment
  15. 15. Site & Meteo Details Location coordinates 31.527N, 34.3E Avg. Ambient Temperature (0C) Max Average Min 33.4 25.1 14.3 Relative humidity 76.1% Avg. Daily Solar irradiation- Horizontal 5.25 Kw-hrs/m2/day Atmospheric Pressure 98.2 kPA Wind Speed 2.2 m/s Avg. Earth temperature (0C) Max Average Min 36.8 26.1 14.1 Height from sea level 21m Project Details Type of installation Ground-mounted Estimated array peak power 850kWp Shading consideration Shade-free LT voltage 415-480V AC Phase connection 3-phase Grid frequency 50Hz Required area 5600 sqm Expected Project Cost Meteorological Data Assessment
  16. 16. 1. Average, Max, Min Air Temperature Meteorological Data Analysis
  17. 17. 1. Average Insolation Incident Kwh/m2/day Meteorological Data Analysis
  18. 18. 1. Why shading is problem ?? Overheating Low performance solar collector 2. Shade-free-No Risk Shading Open area :inter-row shading by designing - raw space between PV rows 3. Uniform shading 4. Un-uniform shading IS VERY IMPORTANT
  19. 19. • Hnaweh HSL72S
  20. 20. 1. the way in which the inverter performs the maximum power point tracking (MPPT), mean that modular configurations are not always the least susceptible to shade effects. 2. central-, string- and module-inverter configurations,``` 3.3 Inverter MPP track 3. Shading Treatment
  21. 21. 1. Elevation or Latitude Angle for preventive shading:/ • An important parameter in the design of photovoltaic systems is the maximum elevation angle, that is, the maximum height of the sun in the sky at a particular time of year. • This maximum elevation angle occurs at solar noon and depends on the latitude and declination angle as shown in the figure below
  22. 22. See my article: https://www.linkedin.com/pulse/cost-optimize-azimuth-angle-tilt-over- photovoltaic-solar-eyad-adnan/
  23. 23.  No cost optimizing can be achieved at hemisphere area by setting the azimuth angle to 180 "PV oriented to south orientation" and the hemisphere south the azimuth angle is 0.
  24. 24. • How much area we need to our project ?? -The required area for all PV nodules = total KWp/160 W I.e. each 160 wattage = 1 m2 @nominal cond - The required area for shading phenomena = 70 % of total area - The free area and equipment area = 30 % - Safety factor upon your economic issue 𝑇𝑜𝑡𝑎𝑙 𝑎𝑟𝑒𝑎 = 𝑡𝑜𝑡𝑎𝑙𝑘𝑤𝑝 160 ∗ 1.7 ∗ 1.3 -if the project is only one raw such as building roofs The shading and free area factors will be small
  25. 25. • Site Surveying is the first step for designing and installing PV grid • Average solar radiation, site latitude, sun elevation angle and shading effects should be investigated during site visit and assessment • Shading can be eliminated by free space between PV rows, PV bypass panels , tilt angle and MPP track in string inverters • Tilt angle of PV panel can determine by site latitude angle • Azimuth angle or PV orientation to south sun at northern hemisphere • Shading can be either uniform or non uniform shading
  26. 26. • No cost optimizing can be achieved at hemisphere area by setting the azimuth angle to 180 "PV oriented to south orientation" and the hemisphere south the azimuth angle is 0. • Tilt angle is fixed to your latitude building +15 in winter and -15 in summer; • the fixed tilt angle over year is the average angle between tilt angle in summer and winter
  27. 27. • AS/NZS 4509.2 • AS/NZS 5033:2014 • PVTRIN Handbook

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