Solar spectral irradiance and summary outputs using excel.

Area of Science:

• Atmospheric Science
• Renewable Energy

Background:

• Accurate solar spectral irradiance data is crucial for applications ranging from UV protection to solar power generation.
• Existing models can be complex and require extensive input parameters.

Purpose of the Study:

• To develop a simplified Excel spreadsheet model for calculating solar spectral irradiance.
• To provide accurate estimations of UV index, illuminance, and energy distribution in solar radiation.

Main Methods:

• The model calculates solar spectral irradiance (290-3000 nm) for a cloudless, sea-level, horizontal surface.
• It utilizes a simplified approach based on Ockham's razor principle.
• Requires only four inputs: geographical latitude, month, day, and time of day.

Main Results:

• The spreadsheet outputs solar spectral irradiance, global UV index, illuminance, and waveband energy percentages.
• The model achieves adequate accuracy for many practical applications.
• Demonstrates ease of use for individuals without specialized scientific backgrounds.

Conclusions:

• The developed Excel spreadsheet offers a user-friendly and accurate tool for assessing solar radiation.
• It simplifies the calculation of essential solar parameters, broadening accessibility for various users.
• This tool supports informed decisions in fields reliant on sunlight data.