Direct Beam Radiation Posted on 7th November 201524th July 2021 by ThePD (The Project Definition) Direct Beam Radiation is the solar radiation that arrives in a straight ray from the sun. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged energy, radiation. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.