-
7/28/2019 small scale wind
1/15
Small scale wind energy
W. Hulshorst
Jan. 2009
-
7/28/2019 small scale wind
2/15
Agenda
1)Types of small scale wind energy systems
2) How to estimate the energy output
3) Aspects on the location
4) Case study with RETscreen
-
7/28/2019 small scale wind
3/15
What is Small Scale WE?
Exact definition is not always clear:
According IEC 61400:2007:
turbines with swept rotor area
< 200 m2 are classified as
small scale turbines
Non universal definitation is
often based on the kW:
system that is self yawing (tail vain)and < 100 kW.
-
7/28/2019 small scale wind
4/15
Wind energy for remote areas
Off grid systems
Weather stations
Wind PV
Wind Diesel
-
7/28/2019 small scale wind
5/15
Wind energy on buildings
Horizontal Vertical
In between?
-
7/28/2019 small scale wind
6/15
But also integrated
-
7/28/2019 small scale wind
7/15
Power curves
-
7/28/2019 small scale wind
8/15
Wind distribution
To estimate the annual energy:- Power Curve
- Wind distribution
At most locations the wind-
distribution can be described as
a weibull distribution
At higher heigts the wind speed is often higher.
Thats the reason why we build wind turbines on a tower
Restrication could be the weight of the generator/alternator
-
7/28/2019 small scale wind
9/15
Urban wind characteristics
small wind turbines require less wind & land resources
than large turbines, so their installation is feasible in a
wider variety of locations.
However small scale wind projects in urban areas do
face some constrains:
Lower annual mean wind speed
Turbulance
Potential difficulties in obtaining planning permission
-
7/28/2019 small scale wind
10/15
Site conditions effects output
-
7/28/2019 small scale wind
11/15
Location
Output of energy depends on the windspeed
The windspeed increases significantly near the top of a
hill and the air flow should be free of obstacles.
Existing obstacles, such as buildings, trees can
significantly affect wind speed.
Locate as far as possible from obstacles
Alternatively, the turbine height can be increased to
compensate the lack of distance
-
7/28/2019 small scale wind
12/15
Locations
-
7/28/2019 small scale wind
13/15
Other issues
It is recommended that the wind turbine is located
reasonably close to the point of energy use or to the
grid connection.
Noise and visual impact are particularly sensitive
issues in a residential area. Both can be subjective and
hard to judge.
-
7/28/2019 small scale wind
14/15
Some interesting websites
General information about renewables:
www.leonardo-energy.org
Information about wind manufacturers in
Europe:www.urbanwind.org
www.allsmalwindturbines.org
Windspeed in different countries:
www.windatlas.dk
http://www.leonardo-energy.org/http://www.urbanwind.org/http://www.allsmalwindturbines.org/http://www.windatlas.dk/http://www.windatlas.dk/http://www.allsmalwindturbines.org/http://www.urbanwind.org/http://www.leonardo-energy.org/http://www.leonardo-energy.org/http://www.leonardo-energy.org/
-
7/28/2019 small scale wind
15/15
Thanks for your attention
Walter Hulshorst
Econ International B.V.
PO box 5035
6802 EA Arnhem
The Netherlands
T: + 31 (0)61 047 45 77
F: + 31 (0)26 381 64 82E: [email protected]
W: www.econ-international.nl
mailto:[email protected]://www.econ-international.nl/http://www.econ-international.nl/http://www.econ-international.nl/http://www.econ-international.nl/mailto:[email protected]:[email protected]:[email protected]
