111 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by rotom on Tue, 11/08/2020 - 12:25

Duration:

00:00:01

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	208.997 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	350.318 RPM	n_nom
Nominal tip speed ratio	4.4	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	3 mm	hr
Magnet width-to-pole pitch ratio	0.511247	ai
Inner-to-outer magnet radius	0.522421	kd
Magnets on a rotor disk	16	magnet_num
Distance between magnets	2.7393 mm	dist_magnet_Rin
Magnet mass	192 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	800 mm3	Vmag
Volume of all magnets	25600 mm3	VolumeMagnet
Remanent magnetic flux density	1.35 T	Br
Magnetic coercivity	1041910 A/m	Hc
Maximum Energy Product	366 KJ/m³	BHmax
Outer diameter	105 mm	Dout
Average radius	39.8474 mm	Ravg
Inner radius	27.3474 mm	Rin
Outer radius	52.5 mm	Rout
Effective outer radius	52.3474 mm	Rout_eff
Mass of rotor disks	0.408879 kgr	BackIronMass
Volume of rotor disks	51.9541 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	6 mm	tw
Number of phases	3	nphase
Number of coils per phase	4	q
Total number of coils in stator	12	coil_num
Number of turns per coil	43	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	3.53429 mm2	sc
Copper wire diameter (Calculated)	2.12132 mm	dc_theor
Coil leg width	21 mm	wc
Average length of coil turn	131.94 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	664.978 cm²	stator_surface_area
Heat coefficient	0.396156	cq_real
Current density	5.09296 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.0308965 Ohm	Rc
Phase resistance	0.123586 Ohm	Rphase
Phase inductance	0.000289594 H	Ls
Nagaoka constant	0.134955	Kn
Volume of a single coil	16624.4 mm3	coil_volume
Weight of a single coil	187.598 g	coil_weight_constr
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	8 mm	coil_hole_Rout_constr
Coil mass for construction	2.43878 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	34.4089 V	EMF_nom
Current at the nominal wind speed	18 A	Iac_nom
Nominal frequency	46.7091 Hz	fnom

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

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	86.2451 EUR	Totalcost
Total generator mass	2.79033 kgr	TotalMass
Total generator volume	0.190498 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	27.4806 EUR	Magcost
Magnet shipping cost	1.54589 EUR	shippingcost
Copper mass	2.15113 kgr	mcu
Cost of copper	31.7506 EUR	coppercost
Resin mass	0.0383229 kgr	resinmass
Cost of resin	0.529351 EUR	resincost
Resin volume	28.1786 cm3	ResinVolume
Total mass of one generator rotor	0.300439 kgr	TotalMassRotor
Cost of iron	0.502921 EUR	ironcost
Surface area of moulds	0.164025 m2	woodS
Total cost of moulds	25.9816 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6495.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Nominal TSR:

4.40

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

105.00mm

Magnetic material:

NdFeB N45

Number of generator poles:

Magnet length:

25mm

Magnet width:

8mm

Magnet thickness:

4mm

Rotor disk thickness:

3mm

Mechanical clearance:

1.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

0.55

Current at nominal wind speed:

18.00A

Stator thickness:

6mm

Number of turns per coil:

Copper wire diameter:

1.50mm

Number of wires at hand:

Coil leg width:

21mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

48.00V

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:

Automesh

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³