Since the last post a lot of effort has been dedicated to a presentation and mid-project report so little concrete work has been done in the project itself. Today I however played around with some equations and got a new one of interest. I haven't double checked it yet though so full disclaimer. However, it seems that the steady state conduction losses in relation to it's produced shaft power in a DC machine connected to a Savonius turbine with a radius r can be expressed as \$ P_{cond.loss,frac}=\frac{P_{cond.loss}}{P_{shaft}} = \frac{R \rho H V C_{p0}}{\lambda_0 k n}r^3 \$ (1) where V is the wind speed, R is the DC machine series resistance, Roh is the air density H is the rotor height, Cp0 denotes the turbine effiency and lambda a desired tip-to-wind-speed-ratio, both assumed to be constant (a good approximation if a controller is used). Furthermore k is the ideal DC machine constant and n is a gearing ratio between the turbine and DC machine shaft assumed to
Love from The University of Chalmers! Thats me, because when you pronounce Love differently you get my Swedish name. Now and then I'm working on a project as a student, and I would like to share some of them with the rest of the world. Apart from what could be expected, the blog won't be designated to mechatronic systems exclusively. Hope you find something of interest.