Liquid Based Solar Heating System Posted on 5th December 201517th May 2021 by ThePD (The Project Definition) Liquid-Based Solar Heating System is a solar heating system that a liquid as the heat transfer fluid with storages. 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, renewable energy, solar energy. 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.