From the Stack Effect and Wind Turbine equations, one
can calculate a Stack Area and "wind velocity" and the maximum turbine power attainable.
1% "Thermal Efficiency" based on Ti-To/Ti (The Carnot Efficiency)
with outside/incoming air "temperature dilution" would be overly optimistic
no matter how high the stack.
Fred
"According to model calculations, an updraft power plant with an output of 200 MW would need a collector 7 kilometres in diameter (total area of about 38 km²) and a 1000 metre high chimney.[2] The 38 km² collecting area is expected to extract about 0.5% of the solar power (1 kW/m²) that falls upon it. Because no data are available to test these models on a large-scale updraft tower there remains uncertainty about the reliability of these calculations."
Stack Effect Equations:
Wind Turbine Power:
From Dan Fink's "Wind Basics":
" Wind Power (watts) = 1/2 *air density *swept area* wind velocity^3
