The set up

The set up
5.36mm jet delivering 0.63 l/s to the pelton which is rotating at 870 rpm and generating 127 watts into the grid.

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:

Friday, 8 June 2018

The picture now ...

It's June and water flow is drying up.  For comparison with the pics posted in March, these pics show how the set up is running this morning:

1. View at the top end

2. View at the business end

3. View at the consumption end

Friday, 6 April 2018

Pictured yesterday...

Yesterday was a perfect cloudless day, - giving near maximum photo-voltaic output (19.54 kWh) on top of maximum hydro output (20.92 kWh) : total 40.47 kWh.  This concurrence of maximum outputs only happens at this time of year when water flow is still good and the sun sufficiently high in the sky to make the pv panels give close to their full rated output.  It also helps that the air is still cool, which boosts the output from the pv panels.  

For those discerning enough to note it, the asymmetrical shape of the solar output curve is because the orientation of the panels is ESE, - and they are located in the northern hemisphere.