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Temperature-> (e) Lofting

FIG. 5.8.8 Effect of temperature profile on plume rise and diffusion. (Reprinted from G.A. Briggs, 1969, Plume rise, U.S. Atomic Energy Commission Critical Review Series T10-25075. Clearinghouse for Federal Scientific and Technical Information.)

Meteorological Factors

Some meteorological factors affecting plume rise include wind speed, air temperature, atmospheric stability, turbulence, and wind shear at the stack height. As these conditions vary, the rise of the plume is enhanced or reduced. The final effective plume height is reached only at some point downwind of the stack; this condition is known as gradual plume rise. Many dispersion models (especially where terrain is an important consideration) incorporate special algorithms to analyze ambient concentrations in

: Actual Temperature Profile

FIG. 5.8.9 Variation of wind with height for different roughness elements (figures are percentages of gradient wind). (Reprinted from D.B. Turner, 1970, Workbook of atmospheric dispersion estimiates (Revised), Office of Air Programs Pub. No. AP-26, Research Triangle Park, N.C.: U.S. EPA and based on A.G. Davenport, 1963, the relationship of wind structure to wind loading. Presented at Int. Conf. on the Wind Effects on Buildings and Structures, Nat. Physical Laboratory, Teddington, Middlesex, England, 26-28 June.)

FIG. 5.8.9 Variation of wind with height for different roughness elements (figures are percentages of gradient wind). (Reprinted from D.B. Turner, 1970, Workbook of atmospheric dispersion estimiates (Revised), Office of Air Programs Pub. No. AP-26, Research Triangle Park, N.C.: U.S. EPA and based on A.G. Davenport, 1963, the relationship of wind structure to wind loading. Presented at Int. Conf. on the Wind Effects on Buildings and Structures, Nat. Physical Laboratory, Teddington, Middlesex, England, 26-28 June.)

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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