Natural Draft is caused by temperature differences by the force of air density differential that flows due to the difference in density of the hot flue gases and cooler ambient gases.
Related Definitions in the Project: The Process Engineering
Natural Draft
Posted in Engineering and tagged process.
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.