CEE_Neo_leo | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by leodorier on Mon, 13/11/2023 - 16:34

Duration:

00:00:39

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)	345.113 RPM	n_nom
Nominal tip speed ratio	4.33462	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.501527	ai
Inner-to-outer magnet radius	0.664827	kd
Flux density in airgap	0.645959 T	Bmax
Flux density on magnet surface	0.687931 T	Bmg
First harmonic of flux density in airgap	0.539974 T	Bp
Flux per pole (Calculated)	0.000960198 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	17.7746 mm	dist_magnet_Rin
Magnet mass	2484 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	331200 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	276.12 mm	Dout
Average radius	114.243 mm	Ravg
Inner radius	91.2427 mm	Rin
Outer radius	138.06 mm	Rout
Effective outer radius	137.243 mm	Rout_eff
Mass of rotor disks	9.42519 kgr	BackIronMass
Volume of rotor disks	1197.61 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.17528 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	34	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	3.54 mm2	sc
Copper wire cross-sectional area (Calculated)	3.13266 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	1.77 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.99766 mm	dc_theor
Coil leg width	16.8336 mm	wc
Average length of coil turn	204.857 mm	lavg
Stator nominal temperature	67.4818 C°	tc_real
Stator surface area	620.727 cm²	stator_surface_area
Heat coefficient	0.236561	cq_real
Current density	5.75206 A	Jmax_real
Resistivity of copper at nominal temperature	1.99996E-8 Ohm.m	pt
Resistance of a single coil	0.0393503 Ohm	Rc
Phase resistance	0.118051 Ohm	Rphase
Phase inductance	0.000248228 H	Ls
Nagaoka constant	0.221723	Kn
Winding coefficient	0.95	kw
Volume of a single coil	44830.2 mm3	coil_volume
Weight of a single coil	233.397 g	coil_weight_constr
Coil hole at Ravg	30 mm	coil_hole_Ravg
Coil hole at Rin	30 mm	coil_hole_Rin_constr
Coil hole at Rout	30 mm	coil_hole_Rout_constr
Coil mass for construction	2.33397 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.2591 V	EMF_nom
Current at the nominal wind speed	20.3623 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	34.5113 Hz	fnom
Generator power (Calculated)	689.695 W	Pnom
Copper losses (Calculated)	146.84 W	Pcopper
Eddy current losses (Calculated)	15.086 W	Peddy
Generator efficiency (Calculated)	0.79763	efficiency_real
AC Power at the rectifier (Calculated)	620.726 W	Pnom_rect
DC Power at the batteries (Calculated)	558.653 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)	13.0598 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	350.432 EUR	Totalcost
Total generator mass	15.8063 kgr	TotalMass
Total generator volume	3.35331 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	230.554 EUR	Magcost
Magnet shipping cost	20 EUR	shippingcost
Copper mass	1.98387 kgr	mcu
Cost of copper	29.282 EUR	coppercost
Resin mass	1.91323 kgr	resinmass
Cost of resin	26.4273 EUR	resincost
Resin volume	1406.79 cm3	ResinVolume
Total mass of one generator rotor	5.9546 kgr	TotalMassRotor
Cost of iron	11.593 EUR	ironcost
Surface area of moulds	0.331914 m2	woodS
Total cost of moulds	52.5752 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-8318.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Aerodynamic coefficient:

0.32

Cut-in wind speed:

3.50m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

9.00

Design TSR:

4.50

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N40

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

1.50mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

13mm

Current density:

6.50A/mm2

System Inputs

System voltage:

24.00V

Nominal voltage:

24.00V

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