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  1. 𝐺𝛾 = 𝐡𝛾 + 𝐷𝛾 + 𝑅𝛾 𝐺𝛾 = πΊπ‘™π‘œπ‘π‘Žπ‘™ π‘ƒπ‘™π‘Žπ‘›π‘’ π‘œπ‘“ πΌπ‘Ÿπ‘Ÿπ‘Žπ‘‘π‘–π‘Žπ‘›π‘π‘’ 𝑃𝑂𝐴 𝐡𝛾 = πΌπ‘Ÿπ‘Ÿπ‘Žπ‘‘π‘–π‘Žπ‘›π‘π‘’ π·π‘–π‘Ÿπ‘’π‘π‘‘π‘™π‘¦ π‘“π‘Ÿπ‘œπ‘š π‘‘β„Žπ‘’ π΅π‘’π‘Žπ‘š (𝐷𝑁𝐼) 𝐷𝛾 = 𝐷𝑖𝑓𝑓𝑒𝑠𝑒𝑑 πΌπ‘Ÿπ‘Ÿπ‘Žπ‘‘π‘–π‘Žπ‘›π‘π‘’ π‘“π‘Ÿπ‘œπ‘š π‘‘β„Žπ‘’ πΆπ‘™π‘œπ‘’π‘‘π‘ , π‘†π‘˜π‘¦ π‘Žπ‘›π‘‘ πΈπ‘›π‘£π‘–π‘Ÿπ‘œπ‘›π‘šπ‘’π‘›π‘‘ (𝐷𝐻𝐼) 𝑅𝛾 = πΌπ‘Ÿπ‘Ÿπ‘Žπ‘‘π‘–π‘Žπ‘›π‘π‘’ π‘“π‘Ÿπ‘œπ‘š π‘”π‘Ÿπ‘œπ‘’π‘›π‘‘ π‘Ÿπ‘’π‘“π‘™π‘’π‘π‘‘π‘–π‘œπ‘› π΄π‘™π‘π‘’π‘‘π‘œ The traditional Irradiance model sums all known irradiance to derive the Total Irradiance (POA):
  2. Concept β—¦ Policy decisions (agriculture, weather prediction) β—¦ Site and Technology Selection (weather, geography, environmental impact) Feasibility β—¦ Investor commitment (yield forecasts, photobiology, environment, and impact assessment) Due Diligence β—¦ Engineering Design β—¦ System Integration Operations β—¦ Operations and maintenance β—¦ Energy System Integration β—¦ Yield Optimisation
  3. DIRECT MEASUREMENT METHOD: ο‚· Pyrheliometer: Measure direct normal irradiance, irradiance immitted directly from the sun ο‚· Pyranometer: Upwards facing sensor to measure 180Β° or horizontal irradiance in the atmosphere ο‚· Albedometer: An inverted Pyranometer to measure ground reflection OR GEOGRAPHICAL AND MATHEMATICAL MODELS: ο‚· DIRINT / DISC: Predictive models to estimate direct normal irradiance (DNI/DHI) from time-series historical data
  4. A Pyrheliometer is an instrument designed specifically to measure the direct beam solar irradiance with a narrow field of view. β—¦ A two-axis moving thermocouple β—¦ Tracks sun movement through a narrow aperture β—¦ Considered accurate capture of direct irradiance β—¦ Most of commercial sky imagers are costly, restricting their use to low-cost applications β—¦ A Pyrheliometer is one of the most significant investments in any irradiance measurement setup
  5. Through multiple instantaneous data capture on 14 fixed position cells, can produce a combined model of 91 mathematical representations of DHI and DNI simultaneously. Solar Sphere has no moving parts Lower cost components Uses known and readily available models for measuring irradiance Significant out-performance of existing predictive irradiance models (DIRINT)
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