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Onsite Albedo Measurement in KSA

Albedo can be defined as the ratio of the reflected irradiance (RI) to the global horizontal irradiance (GHI) received by the ground surface. It is a dimensionless value ranging from 1 (a perfect reflector) to 0 (a perfect absorber).

Industry Solar PV power plant services
ClientsACWA Power
Time frame2020
Project locationKingdom of Saudi Arabia
Goal and Challenges
  • Assessment of design and engineering of solar PV power plant using bifacial modules based on validated albedo onsite measurements
  • Albedo measurement for bankability and feasibility study
Scope of Work
  • Onsite albedo measurement according to ASTME 1918-16 standard and client requirements
  • Three different points for each site chosen representing different terrains
  • Measurement taken for one complete day for each point
  • Measurement done at height of 1.00m representing average height of PV modules onsite
  • Data filtration and correction conducted on the measurement for more accurate and representative mean albedo value for each site
  • Graphical representation of filtered and corrected data of GHI, RI and albedo during day for each point
  • TÜV Rheinland detailed report on onsite Albedo for accurate and bankable PV system design
  • Validation of measured data compared to satellite data
  • Analysis on different terrains/soils to provide minimum and maximum albedo limit values
  • Determination of uncertainty level of onsite measured data

The albedo value depends on many factors such as ground surface properties, surface homogeneity, spectral and angular distribution of solar radiation reaching the ground. These factors varies with the geographical location and time. Hence, the albedo value varies both through the year and over the years.

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About TÜV Rheinland

Founded 145 years ago, TÜV Rheinland is a global leader in independent inspection services, ensuring quality and safety for people, the environment and technology in nearly all aspects of life. We inspect technical equipment, products and services, oversee projects and help to shape processes for companies around the world.

Since 2006, we have been a member of the United Nations Global Compact to promote sustainability and combat corruption. TÜV Rheinland is a world leader in testing and supply chain management services for the solar industry.

With over 35 years of experience, we offer testing and certification of PV modules and components, supply chain management, and independent engineering for PV power plants.