6.48 mm diameter nozzle delivering 0.91 l/s to the runner which is rotating at 1084 rpm and generating 225 watts into the grid at an overall efficiency of 47%.

Sunday 15 July 2018

The latest picture

It's proving to be a hot summer.  No rain for over a month and I'm down to my next to smallest size of jet. But unlike many small hydros at least mine is still generating.  The number of kWh it manages in a 24 hour period is not many (3 in fact), - but solar panels make the generation total 17 - 24 kWh / day.

Here's what things look like as of today:

At the top end:


At the business end:


At the consumption end:


At these low flows, the usual 42 pole stator is replaced by a reduced stator having only 18 poles.  Without this there is too much magnetic attraction between the permanent magnets of the rotor and the steel core of the poles for the pelton to get up to speed.  Here is what the reduced core stator looks like:



No comments: