Practise 3 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by morganmccaughey on Tue, 02/03/2021 - 13:52

Duration:

00:00:01

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	286.624 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	394.049 RPM	n_nom
Nominal tip speed ratio	2.06219	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.00105675	ai
Inner-to-outer magnet radius	0.99917	kd
Flux density in airgap	0.54 T	Bmax
Flux density on magnet surface	0.62 T	Bmg
First harmonic of flux density in airgap	0.4 T	Bp
Flux per pole (Calculated)	1.55E-5 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	4724.52 mm	dist_magnet_Rin
Magnet mass	6 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	50 mm3	Vmag
Volume of all magnets	800 mm3	VolumeMagnet
Remanent magnetic flux density	1.265 T	Br
Magnetic coercivity	982324 A/m	Hc
Maximum Energy Product	326 KJ/m³	BHmax
Outer diameter	12053.6 mm	Dout
Average radius	6024.31 mm	Ravg
Inner radius	6021.81 mm	Rin
Outer radius	6026.81 mm	Rout
Effective outer radius	6026.81 mm	Rout_eff
Mass of rotor disks	17960.9 kgr	BackIronMass
Volume of rotor disks	2282200 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	2	q
Total number of coils in stator	6	coil_num
Number of turns per coil	1027	Nc
Copper wire diameter	1.9 mm	dc
Number of wires at hand	8	No_wires_at_hand
Winding fill factor	0.57	kf
Copper wire cross-sectional area	22.72 mm2	sc
Copper wire cross-sectional area (Calculated)	33.3283 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.84 mm²	sc_multi_wires
Copper wire diameter (Calculated)	6.51586 mm	dc_theor
Coil leg width	3148.91 mm	wc
Average length of coil turn	9907.58 mm	lavg
Stator nominal temperature	26.7411 C°	tc_real
Stator surface area	3743770 cm²	stator_surface_area
Heat coefficient	0.0166769	cq_real
Current density	1.46691 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	9.36804 Ohm	Rc
Phase resistance	18.7361 Ohm	Rphase
Phase inductance	5.06822 H	Ls
Nagaoka constant	0.00318195	Kn
Winding coefficient	0.95	kw
Volume of a single coil	405575000 mm3	coil_volume
Weight of a single coil	2070760 g	coil_weight_constr
Coil hole at Ravg	5 mm	coil_hole_Ravg
Coil hole at Rin	5 mm	coil_hole_Rin_constr
Coil hole at Rout	5 mm	coil_hole_Rout_constr
Coil mass for construction	14495.3 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	2.566 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	3.52825 V	EMF_nom
Current at the nominal wind speed	33.3283 A	Iac_nom
Terminal voltage at the nominal wind speed	2.8226 V	V_term_line
Nominal frequency	26.2699 Hz	fnom
Generator power (Calculated)	282.217 W	Pnom
Copper losses (Calculated)	62434.6 W	Pcopper
Eddy current losses (Calculated)	1136.21 W	Peddy
Generator efficiency (Calculated)	0.00361765	efficiency_real
AC Power at the rectifier (Calculated)	253.996 W	Pnom_rect
DC Power at the batteries (Calculated)	228.596 W	Pnom_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 (Calculated)	14158.2 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	242548 EUR	Totalcost
Total generator mass	31320.1 kgr	TotalMass
Total generator volume	4450.3 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	8.52791 EUR	Magcost
Magnet shipping cost	0.0483092 EUR	shippingcost
Copper mass	12400.4 kgr	mcu
Cost of copper	183030 EUR	coppercost
Resin mass	958.785 kgr	resinmass
Cost of resin	13243.6 EUR	resincost
Resin volume	704989 cm3	ResinVolume
Total mass of one generator rotor	8980.48 kgr	TotalMassRotor
Cost of iron	22092 EUR	ironcost
Surface area of moulds	152.612 m2	woodS
Total cost of moulds	24173.7 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6919.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

12.00m/s

Cut-in TSR:

6.00

Design TSR:

6.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N40

Number of generator poles:

Magnet length:

5mm

Magnet width:

5mm

Magnet thickness:

2mm

Rotor disk thickness:

Calculated

Mechanical clearance:

1.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

1.00A/mm2

System Inputs

System voltage:

6.00V

Nominal voltage:

6.00V

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

Also run UserAFPM:

false

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³