I serviced (annual) it in September 08. The main problem was that one of the lower yaw bearing bolts sheared! ( There are 4 rubber rollers with stainless steel bolts). Fortunately it was canted to one side, but still in contact with the shaft, so I'm hoping it has not damaged the upper bearing. I may replace all the bolts with high tensile bolts.
All 3 bearings were greased lightly with EP grease - and the turbine is quieter, but not quite sure why...
My only other concern is that the blade tips (leading edges) are getting pitted. Not too bad yet, but next year I will have to use some epoxy filler (boat type).
--
PJB (Peter Benning)
17.25 mWhs in one year
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Peter John Benning - 2008-10-23 22:21:15 |
| Re: 17.25 mWhs in one year | Stuart - 2008-10-23 22:25:23 |
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Peter, wow great.
Can you give us more details. What is the wind speed and nature of your site? |
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| Re: 17.25 mWhs in one year | Peter John Benning - 2008-10-30 20:22:16 |
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Hi Stuart,
I can't tell you the actual wind speeds, my post code is SY19 7BW, and it gave an average speed I think of around 5m/s. The post code takes in the whole village, centred on the pub, which is 200-300' below us. We are 1400' amsl, on the side of a hill which reaches upto 1800'. The house is fairly well sheltered with trees upto 40-50'. The turbine on its 15m mast is at the top of the garden (2 acres), and has a clear run from SW to NE. It never oscillates in low winds. It will quite often churn out over 100kWhs in a day. It is coming upto 10,000 hours of operation, and averages over 2.2kWs/h. I have a Davis weather station at 5m, with a radio link to my bedroom. We have had winds recorded at over 70mph. My guess is that at 15m it is a lot higher.
At high wind speeds (ie in a storm), if the lights flicker; the G59 relay cuts off the grid connection, and the dc voltage goes over 600v. The 6kW Windyboy will not allow a re connection. I'm on the waiting list with Proven for a new controller with a heat sink... |
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| Re: 17.25 mWhs in one year | Paul Turner - 2008-10-31 09:49:50 |
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That's an awesome amount of power generated from a 6kW machine. Great stuff!! -- Paul at Carbon Free Energy |
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| Re: 17.25 mWhs in one year | Richard fortin - 2010-09-23 18:29:32 |
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-- Apiarist
I had a Proven 6kw turbine on a 15m mast installed last December after indications that it would generate around 8,000 kwhs pa. In fact its output to date is only 885 kwhs. The site is about 140m above sea level and open to the SW which is the prevailing wind direction. There are trees in other directions but some as much as 250m away. The Proven power curves sent to me by the installer showed 1kwh @ 5m/s, 2.6 @ 7 and 5.3 @ 10 ( I gather these have now been withdrawn). The turbine has never come near these figures and in strong, steady SW winds has only produced about 25% of what the power curves indicated - eg 12hrs @ >10m/s produced only 17.5kwhs against a power curve based expectation of 63! I have a Davis weather station sited near the turbine mast on its own mast of about 7m. Its data is fed straight into my computer at 10 minute intervals. Because the installer has not yet commisioned the turbine or issued a MCS certificate I cannot even claim FIT payments for the small amount so far produced. |
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