Blog

Welcome to our blog, written by members of the QED team.

This is an outlet for news, observations on renewable energy, sustainable development, urban regeneration and movable buildings and even the occasional rant! (Please note these do not necessarily represent the opinions of QED as a corporate entity).

We hope you enjoy what you read and feel free to give us your feedback. If you would like our latest blogs delivered directly to your inbox please subscribe by clicking the 'subscribe' link below.

Evance R9000

In December 2011 QED Capital Assets funded the installation of a small (5kW) Evance R9000 wind turbine. It was installed on the 18 m Evance tower. There is a video on my you tube channel of it being hoisted in place using the hydraulic ram. During the course of operation I kept a log of generation data on the old Spiritus website. As I mentioned in an earlier post the data is no longer relevant to that site. But I’ve updated the data and thought I’d post the data here so anyone considering a similar install could find it.

10.12.2011 – Turbine installed
13.04.2012 – 4237 kWh
08.10.2012 – 9646 kWh

The turbine operating for 303 days or 7272 hours, has produced 9646 kWh, an average capacity of 1.33 kW or 26.6 %.
The NOABL wind speed database for the square kilometer in which the wind turbine is located indicates an average windspeed of 6.4 m/s @ 10 metres. A limited set of data (about a month before it gave up the ghost) from a power predictor installed on site showed an extrapolated average wind speed of 6.2 m/s at 16 m.

Screen Shot 2014-02-20 at 14.40.20

A break down of daily generation totals for the period 8th September to 8th October 2012 are shown in the graph below. A total of 912 kWh was generated across the 30 days with an average daily output of 29.42 kWh. The Medium output was 26.21 kWh/day from a range of 5.5 kWh/day to 61.7 kWh/day

sept12generation

The following data is collected using an Owl Energy monitor measuing the inverter AC output upstream of the generation meter. It provides an idea of the generation profile of the small turbine, which unlike a solar generation profile does not appear to follow any particular pattern.

14th September 2012
<14septgenerationprofile

26th September 2012
<genprofile26sept

2nd October 2012
<2ndoctprofile

20.03.2013 – 15504 kWh
The turbine has now been operation for over a year and has been successfully through its first annual service (a cost of around £400 and a single days work). The latest reading comes after 465 days or 11,160 hours of operation during which annual maintenance checks aside the turbine has been 100 % operational with an average capacity of 1.39 kW or 27.8 % to date.

19.06.2013 – 18886 kWh
20.09.2013 – 20774 kWh
13.12.2013 – 23569 kWh

The turbine has been operation for 2 years now – bar one very stormy night which saw the safety break come on (this must be manually switched back) – with no issues what so ever. The turbine has been operational for 2 years and 3 days, thats 734 days (2012 was a leap year) or 17,616 hours. In that time it has produced 23569 kWh which is an average operating output of 1.34 kW or a capacity of 26.75 %.

QED topples Dunster