Hi everyone…. I’m trying to evaluate the feasibility of putting what is essentially a wind turbine inside a horizontal exhaust shaft. I have a feeling that this would affect the volume flow rate through the shaft, but am having difficulty proving it. I have found plenty of textbook examples showing pressure and velocity changes through a turbine in the open air, with a small ‘envelope’ upstream changing to a larger ‘envelope’ downstream, but because my case is in a confined space, I am not sure that they apply. By applying conservation of energy theory, Ein = Eout + Eelec, where Ein & Eout is that of the air, and Eelec is the power generated by the turbine. If Ein & Eout = (Pressure/density)+(velocity^2/2)+(gravity*height), the height term will go, because it is constant, but what changes and how with respect to the pressure and velocity. My gut feeling is that the velocity changes…but I’m not sure. Maybe I’m on the completely wrong track though, so any help that you can offer would be much appreciated.