This technical brief develops calculation methods for the pressure drop in very tall chimneys, as in solar chimney power plants. The methods allow for density and flow area change with height, for wall friction and internal bracing drag. It presents equations for the vertical pressure and density distributions in terms of Mach number. One of these is a generalization of the adiabatic pressure lapse ratio equation to include flow at small Mach numbers. The other is analogous to the hydrostatic relationship between pressure, density, and height, but extends it to small Mach numbers. Its integration leads to an accurate value of the average density in the chimney.
Calculation of Pressure and Density in Solar Power Plant Chimneys
Contributed by the Solar Energy Division of the American Society of Mechanical Engineers for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division, July 2001; final revision, April 2002. Associate Editor: J. Davidson.
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von Backstro¨m , T. W. (January 27, 2003). "Calculation of Pressure and Density in Solar Power Plant Chimneys ." ASME. J. Sol. Energy Eng. February 2003; 125(1): 127–129. https://doi.org/10.1115/1.1530198
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