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Description	Horizontal-axis wind turbines (HAWT) are built with a main rotor shaft and an electrical generator that are installed on the top of a tower, and must be pointed into the wind. The small turbines can be pointed into the wind by a simple wind vane, while large turbines often use a wind sensor coupled with a servo motor. Most have a gearbox, which turns the slow rotation of the blades into a quicker rotation which is more suitable to drive an electrical generator.
Advantages	Increased efficiency in power production Smooth transfer of that power from the rotor to the gearbox
Disadvantages	Noise exposure which reduces especially the applicability in urban areas
Characteristic features	Conversion of kinetic energy from the wind into electrical power
Application barriers	High initial investment cost
Information sources	http://www.nordex-online.com http://www.braun-windturbinen.com http://www.vestas.com/ http://wind-turbine.com
Image
Trade:	Building services

Parameter	Minimal Value	Maximal Value	Unit
Nominal Power	0.025	250	kW
Nominal Wind Speed	8	20	m/s
Start Wind Speed	2	4	m/s
Stop Wind Speed	10.5	60	m/s
Maximum Wind Speed Allowed	60	250	km/h
Rotor Weight	3	2300	kg
Rotor Diameter	0.5	21	m
Rotor Surface	0.196	346	m2
Mast Height	5	36	m
Maximum Rotation Speed	47	1200	rpm
Transmission	Gearless, Spur gear/planet gears, Compact shaft mounted gear, No brake system
Safety	Pitch-control + generator overload regulation, Inductors, Blade pitch control, Electrical, Optional remote control at tower base, Short circuit in generator, Disk brake + Mech tip brake, Parking brake system, Stall, Electro-dynamic, Electromagnetic, Electronic"Pitch-control + generator overload regulation, Inductors, Blade pitch control, Electrical, Optional remote control at tower base, Short circuit in generator, Disk brake + Mech tip brake, Parking brake system, Stall, Electro-dynamic, Electromagnetic, Electronic" cannot be used as a page name in this wiki.
Number of Blades	2	6
Material Blades	Composite fibre glass, Glass filled polypropylene, Glass reinforced nylon, Carbon fibre epoxy, Glass reinforced plastic, Steel polyster, Polypropylene, Polyurethane
Voltage (AC)	12	500	V
Minimum Operating Temperature	-40	-20	°C
Maximum Operating Temperature	35	120	°C
Noise at 20 m Distance with 5 m/s	3	95	DB
Positioning	on the ground	on the roof
Operating Efficiency	35	52	%
Annual Degradation Rate in Efficiency			%
Annual Produced Energy			kWh
Investment Cost	2.320	7.539	€/kW
Operational Cost	2	3	% of capital cost
Maintenance Cost	1	3	% of the turbine cost
Life Expectancy	10	30	years

Deterioration	Description
Causes
Parameter
Degradation Rate
Measurement

The Design4Energy project aims to address evolutionary life-cycle evolutionary design methodology able to create energy-efficient buildings flexibly connected with the neighbourhood energy system.

BL(Ti)=0.788