Off- grid Hybrid Renewable Energy System - PowerPoint PPT Presentation

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Off- grid Hybrid Renewable Energy System

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  1. Off-gridHybridRenewableEnergy System Hamad Jassim Rajab 200621000 AbdulrahmanKalbat 200608959 Buti Al Shamsi 200440143 Ahmed Al Khazraji 200620066 Department of Electrical Engineering Graduation Project II Course Spring 2011

  2. Outline • GPI Achievements • Modified Block Diagram • Design Constraints and Standards • HOMER Cases and Comparisons • Wind Turbine optimization • Maximum Power Point • Solar panel optimization • Solar Panel Shading Distance • Pyranometer • Anemometer • Data Acquisition Device (CompactRIO) • Expected Research Areas • Gantt Chart • Designed Poster • Achievements (WETEX 2011+ISSE)

  3. GPI Achievements (1/6)Requirements, Specifications and Constraints • Requirements: Continuous power supply, relatively clean energy and low operating cost • Specifications: best installation location, backup availability and automatic switching • Constraints: limited financial support and area and meeting standards and regulations

  4. GPI Achievements (2/6) Load Profile

  5. GPI Achievements (3/6) Load Profile Total Load Demand = 26.1 kWh/day

  6. GPI Achievements (4/6)Subsystem Sizing 1 wind turbine 24 solar panels 1 Variable Speed Diesel Generator 1 Bi-directional Inverter 24 Batteries 3 Charge Controller

  7. GPI Achievements (5/6) HOMER Simulation • HOMER = Hybrid Optimization Model for Electric Renewables

  8. GPI Achievements (6/6) HOMER Simulation • Main Inputs: • Preferred load profile • Actual Climatic Conditions in Al Ain city (Wind speed and Solar radiation) • Equipments sizes • Main Results: • Operation Cost (AED/Year) • Cost of Energy (AED/kWh) • CO2 Emissions (kg/year)

  9. Modified Block Diagram

  10. Design Constraints and StandardsBudget and Temperature • Limited Budget: 228,000 AED • Ambient temperature: • Average = 28.55 o C • Minimum = 5.3 o C ( in January ) • Maximum = 50 o C ( in June ) (From National Centre of Meteorology and Seismology in UAE )

  11. Design Constraints and StandardsArea (1/3) Free Area = Total area – Used area = (25m X 38m) – (14m X 15m) = (950 m2) – (210 m2) = 740 m2

  12. Design Constraints and StandardsArea (2/3) Solar Panels Considerations: • Maintenance spacing (dust removal) • Panel to panel distance according to NEC (avoiding shade)

  13. Design Constraints and StandardsArea (3/3) Batteries Considerations: • Installed in a cabinet or not Battery rack Battery cabinet Battery Bank

  14. Design Constraints and StandardsNoise Noise: • Threshold of pain = 130 dBA @ 10 meters • Equipment noise < Threshold of pain • Noise from diesel generator and wind turbine

  15. HOMER Simulation (1/8)Case 1: Hybrid System: (5 kW Solar, 0.4 kW Wind, 7 kW Diesel) • Power Sources: 24 PVs, 1 Wind Turbine, 1 Diesel Generator • Load Sharing: 58% PV, 1% Wind, 41% Diesel • Cost of Energy: 2.9 AED/kWh • Operating Cost: 15,300 AED/yr • Shortage: 0% • CO2 Emissions: 6,119 kg/yr

  16. HOMER Simulation (2/8)Case 1: Hybrid System: (5 kW Solar, 0.4 kW Wind, 7 kW Diesel)

  17. HOMER Simulation (3/8)Case 2: Renewable Energy System: (5 kW Solar, 0.4 kW Wind) • Power Sources: 24 PVs, 1 Wind Turbine • Load Sharing: 98% PV and 2% Wind • Cost of Energy: 3 AED/kWh • Operating Cost: 9,920 AED/yr • Shortage: 36% • CO2 Emissions: 0 kg/yr

  18. HOMER Simulation (4/8)Case 2: Renewable System: (5 kW Solar, 0.4 kW Wind)

  19. HOMER Simulation (5/8)Case 3: Renewable Energy System: (17 kW Solar, 0.4 kW Wind) • Power Sources: 81 PVs, 1 Wind Turbine • Load Sharing: 99% PV and 1% Wind • Cost of Energy: 4.4 AED/kWh • Operating Cost: 13,780 AED/yr • Shortage: 0% • CO2 Emissions: 0 kg/yr

  20. HOMER Simulation (6/8)Case 3: Renewable Energy System: (17 kW Solar, 0.4 kW Wind)

  21. HOMER Simulation (7/8)Case 3: Diesel Generator: (7 kW Diesel Generator) • Power Sources: Diesel Generator ONLY • Load Sharing: 100% Generator • Cost of Energy: 3.8 AED/kWh • Shortage: 0% • Operating Cost: 34,000 AED/yr • CO2 Emissions: 25,433 kg/yr

  22. HOMER Simulation (8/8)Results

  23. Wind Turbine (1/2) Wind Turbine: • Average wind direction range = 339o to 6o Angles measured clock-wise from North

  24. Wind Turbine (2/2) • Wind angle range: 27o • Wind turbine blades should head towards the indicated range.

  25. Solar panel (1/11)Installation site coordinates Latitude: 24.2 N Longitude: 55.7 E

  26. Maximum Power Point (1/4)Definition The point on the current-voltage (I-V) curve of a solar module under illumination, where the product of current and voltage is maximum (Pmax, measured in watts).

  27. Maximum Power Point (2/4)Circuit and Equation Model

  28. Maximum Power Point (3/4)Matlab Simulation

  29. Maximum Power Point (4/4)I-V characteristic and PV Power I-V characteristic PV Power

  30. Maximum Power Point (1/7)Definition The point on the current-voltage (I-V) curve of a solar module under illumination, where the product of current and voltage is maximum (Pmax, measured in watts).

  31. Maximum Power Point (2/7)Ideal Model

  32. Maximum Power Point (3/7)Matlab Simulation for Ideal Model

  33. Maximum Power Point (4/7)Real Model

  34. Maximum Power Point (5/7)Matlab Simulation for Real Model

  35. Maximum Power Point (6/7)I-V characteristic Ideal Model Real Model

  36. Maximum Power Point (7/7)PV Power Ideal Model Real Model

  37. Solar panel (2/11)Seasons and sun’s locations • 1st day of spring/autumn = 90 – 24.2 = 65.8o above southern horizon • 1st day of winter = 65.8 – 23.5 = 42.3o above southern horizon • 1st day of summer = 65.8 + 23.5 = 89.3o above southern horizon

  38. Solar panel (3/11)Seasons and sun’s locations • Summer (21 June - 23 September) = 89.3o to 65.8o • Autumn (23 September – 22 December) = 65.8o to 42.3o • Winter (22 December – 21 March) = 42.3o to 65.8o • Spring (21 March – 21 June) = 65.8o to 89.3o

  39. Solar panel (4/11)Expected solar panel tilt angles Solar panel tilt (heading south) = 90 – sun location • Summer (21 June - 23 September) = 0.7o to 24.2o • Winter (22 December – 21 March) = 47.7o to 24.2o • Yearly yield = 24.2o

  40. Solar panel (5/11)Solar panel tilt angles using PVSYST Software • Summer optimum tilt = 0o to 6o

  41. Solar panel (6/11)Solar panel tilt angles using PVSYST Software • Winter optimum tilt = 43o to 46o

  42. Solar panel (7/11)Solar panel tilt angles using PVSYST Software • Yearly yield optimum tilt = 21o to 24o

  43. Solar panel (8/11)Solar panel tilt angles using case study Solar radiation Vs months of the year for different angles in Al Ain Winter Spring Summer Autumn

  44. Solar panel (9/11)Solar panel tilt angles using case study Solar variation (10o) = 0.76 – 0.54 = 0.22 kW/m2 Solar variation (20o) = 0.77 – 0.6 = 0.17 kW/m2 Solar variation (30o) = 0.76 – 0.55 = 0.21 kW/m2  Optimum angle: around20o (maximum and stable solar radiation)

  45. Solar panel (10/11)Factors affecting solar radiation 1) Angle of solar incident: • Best when perpendicular on the tilted plane • Maximum in 1st day of Spring and Autumn Maximum points Winter Spring Summer Autumn

  46. Solar panel (11/11)Factors affecting solar radiation 2) Length of the day: • In polar regions, 6 months of daylight. • Highest solar radiation in the first day of summer (24 hours daylight) Drop during summer ?

  47. Solar Panel Shading distance (1/10)

  48. Solar Panel Shading distance (2/10)

  49. Solar Panel Shading distance (3/10) Solar Panel Dimensions Length = 1.652 m Width = 0.994 m mm mm

  50. Solar Panel Shading distance (4/10) Sun path in Al Ain