test 2 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by eliasvisjes1 on Wed, 19/02/2025 - 18:09

Duration:

00:06:42

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	55.7325 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	796.975 RPM	n_nom
Nominal tip speed ratio	25.025	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	12 mm	hr
Magnet width-to-pole pitch ratio	0.118998	ai
Inner-to-outer magnet radius	0.908818	kd
Flux density in airgap	0.156337 T	Bmax
Flux density on magnet surface	0.174419 T	Bmg
First harmonic of flux density in airgap	0.0379571 T	Bp
Flux per pole (Calculated)	0.000240872 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	210.062 mm	dist_magnet_Rin
Magnet mass	1656 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	331200 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	1009.41 mm	Dout
Average radius	481.484 mm	Ravg
Inner radius	458.484 mm	Rin
Outer radius	504.707 mm	Rout
Effective outer radius	504.484 mm	Rout_eff
Mass of rotor disks	151.152 kgr	BackIronMass
Volume of rotor disks	19206.1 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.255106 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	15 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	1208	Nc
Copper wire diameter	1.12 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.99 mm2	sc
Copper wire cross-sectional area (Calculated)	0.982968 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	0.99 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.11901 mm	dc_theor
Coil leg width	144.96 mm	wc
Average length of coil turn	607.174 mm	lavg
Stator nominal temperature	82.1042 C°	tc_real
Stator surface area	15842.9 cm²	stator_surface_area
Heat coefficient	0.295691	cq_real
Current density	5.95738 A	Jmax_real
Resistivity of copper at nominal temperature	2.01977E-8 Ohm.m	pt
Resistance of a single coil	14.964 Ohm	Rc
Phase resistance	44.892 Ohm	Rphase
Phase inductance	0.698854 H	Ls
Nagaoka constant	0.0649525	Kn
Winding coefficient	0.95	kw
Volume of a single coil	1320240 mm3	coil_volume
Weight of a single coil	6502.37 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	65.0237 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	293.486 V	EMF_nom
Current at the nominal wind speed	5.89781 A	Iac_nom
Terminal voltage at the nominal wind speed	21.5544 V	V_term_line
Nominal frequency	79.6975 Hz	fnom
Generator power (Calculated)	381.371 W	Pnom
Copper losses (Calculated)	4684.6 W	Pcopper
Eddy current losses (Calculated)	1.37702 W	Peddy
Generator efficiency (Calculated)	0.0704162	efficiency_real
AC Power at the rectifier (Calculated)	362.303 W	Pnom_rect
DC Power at the batteries (Calculated)	344.188 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	6	No_bolts_hub
Mass of bearing hub	14290.7 g	BearingHubMass
Rotational losses (Calculated)	348.615 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	1541.35 EUR	Totalcost
Total generator mass	224.868 kgr	TotalMass
Total generator volume	50.4161 dm3	TotalVolume
Blade rotor mass	51.6121 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	33.164 EUR	Magcost
Magnet shipping cost	20 EUR	shippingcost
Copper mass	58.4246 kgr	mcu
Cost of copper	862.347 EUR	coppercost
Resin mass	13.6351 kgr	resinmass
Cost of resin	188.34 EUR	resincost
Resin volume	10025.8 cm3	ResinVolume
Total mass of one generator rotor	76.4041 kgr	TotalMassRotor
Cost of iron	185.917 EUR	ironcost
Surface area of moulds	1.71457 m2	woodS
Total cost of moulds	271.587 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9629.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

3.00m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

2.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Design TSR:

6.30

Air density:

1.225kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

Ferrite C8

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

12mm

Mechanical clearance:

2.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

15mm

Current density:

6.00A/mm2

System Inputs

System voltage:

48.00V

Nominal voltage:

48.00V

Transmission cable losses:

5.00%

Rectifier losses:

5.00%

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:

true

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