test | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Lea on Tue, 20/11/2018 - 15:59

Duration:

00:06:42

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	250.796 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	573.248 RPM	n_nom
Nominal tip speed ratio	6	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	185 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	12 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.21295 m/s	cutin_Vw
Mechanical power (Torque)	311.536 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.776985	ai
Inner-to-outer magnet radius	0.661938	kd
Flux density in airgap	0.226734 T	Bmax
Flux density on magnet surface	0.226664 T	Bmg
First harmonic of flux density in airgap	0.235886 T	Bp
Flux per pole (Calculated)	0.000582555 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	1.2614 mm	dist_magnet_Rin
Magnet mass	6000 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	50000 mm3	Vmag
Volume of all magnets	1200000 mm3	VolumeMagnet
Remanent magnetic flux density	0.39 T	Br
Magnetic coercivity	227950 A/m	Hc
Maximum Energy Product	30 KJ/m³	BHmax
Outer diameter	300 mm	Dout
Average radius	122.902 mm	Ravg
Inner radius	97.902 mm	Rin
Outer radius	150 mm	Rout
Effective outer radius	147.902 mm	Rout_eff
Mass of rotor disks	11.126 kgr	BackIronMass
Volume of rotor disks	1413.72 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.71493 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	3	q
Total number of coils in stator	9	coil_num
Number of turns per coil	45	Nc
Copper wire diameter	1.6 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	4.02124 mm2	sc
Copper wire diameter (Calculated)	2.26274 mm	dc_theor
Coil leg width	21 mm	wc
Average length of coil turn	230.594 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	871.647 cm²	stator_surface_area
Heat coefficient	0.028475	cq_real
Current density	1.64129 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.049667 Ohm	Rc
Phase resistance	0.149001 Ohm	Rphase
Phase inductance	0.000489066 H	Ls
Nagaoka constant	0.196819	Kn
Volume of a single coil	62952.3 mm3	coil_volume
Weight of a single coil	389.623 g	coil_weight_constr
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	50 mm	coil_hole_Rout_constr
Coil mass for construction	3.89623 kgr	mcu_constr
RMS flux linkage of phase A	0.0144926 Wb	FluxRmsA
RMS flux linkage of phase B	0.0142112 Wb	FluxRmsB
RMS flux linkage of phase C	0.0144647 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	11.7303 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	15.3929 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	15.5008 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	15.4064 V	V_rmsC
Current at the nominal wind speed	6.6 A	Iac_nom
Nominal frequency	57.3248 Hz	fnom
Generator power (Torque)	259.471 W	PelN_Torque_x
Electromagnetic power (Torque)	285.457 W	PHMN_Torque_x
Copper losses (Torque)	19.4715 W	PcopperN_Torque_x
Eddy current losses (Torque)	6.51518 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.832876	efftotalN_Torque_x
AC Power at the rectifier (Torque)	233.524 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	210.171 W	PelN_Torque_x_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	4	No_bolts_hub
Mass of bearing hub	3708.65 g	BearingHubMass
Rotational losses (Torque)	26.0784 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	229.544 EUR	Totalcost
Total generator mass	21.5667 kgr	TotalMass
Total generator volume	5.58418 dm3	TotalVolume
Blade rotor mass	1.91156 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	94.3158 EUR	Magcost
Magnet shipping cost	72.4638 EUR	shippingcost
Copper mass	3.35739 kgr	mcu
Cost of copper	49.555 EUR	coppercost
Resin mass	1.08335 kgr	resinmass
Cost of resin	14.9641 EUR	resincost
Resin volume	796.577 cm3	ResinVolume
Total mass of one generator rotor	8.56298 kgr	TotalMassRotor
Cost of iron	13.6849 EUR	ironcost
Surface area of moulds	0.36 m2	woodS
Total cost of moulds	57.024 EUR	woodcost

Revolutions per minute (RPM)
0
57.324841
114.649682
171.974522
229.299363
286.624204
343.949045
401.273885
458.598726
515.923567
573.248408

I_RMS (A)
0
6.6

Output files

Octave/Matlab variable file:

simulation-5782.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.00m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Nominal TSR:

6.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

300.00mm

Magnetic material:

Ferrite C8

Number of generator poles:

Magnet length:

50mm

Magnet width:

50mm

Magnet thickness:

20mm

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

Winding fill factor:

0.52

Current at nominal wind speed:

6.60A

Stator thickness:

13mm

Number of turns per coil:

Copper wire diameter:

1.60mm

Number of wires at hand:

Coil leg width:

21mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

12.00V

Transmission cable losses:

10.00%

Rectifier losses:

10.00%

Financial

Copper price:

12.00€/kg

Iron price:

1.00€/kg

Resin price:

11.23€/kg

Plywood price:

17.60 €/m²

Simulation Inputs

Simulation Radius:

Average radius

Simulation step:

Current step:

RPM Step:

Mesh size:

Fine mesh

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³