TFM | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by sergi7 on Mon, 10/12/2018 - 06:26

Duration:

00:00:06

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)	468.851 RPM	n_nom
Nominal tip speed ratio	2.94439	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.530391	ai
Inner-to-outer magnet radius	0.411862	kd
Flux density in airgap	0.252199 T	Bmax
Flux density on magnet surface	0.406991 T	Bmg
First harmonic of flux density in airgap	0.226116 T	Bp
Flux per pole (Calculated)	0.000332463 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	2 mm	dist_magnet_Rin
Magnet mass	384 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	3200 mm3	Vmag
Volume of all magnets	51200 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	137.485 mm	Dout
Average radius	48.0113 mm	Ravg
Inner radius	28.0113 mm	Rin
Outer radius	68.7425 mm	Rout
Effective outer radius	68.0113 mm	Rout_eff
Mass of rotor disks	2.33671 kgr	BackIronMass
Volume of rotor disks	296.914 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	15 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	160	Nc
Copper wire diameter	1.06 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	0.88 mm2	sc
Copper wire cross-sectional area (Calculated)	0.808486 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	0.88 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.01485 mm	dc_theor
Coil leg width	18.0513 mm	wc
Average length of coil turn	162.955 mm	lavg
Stator nominal temperature	69.1486 C°	tc_real
Stator surface area	352.985 cm²	stator_surface_area
Heat coefficient	0.243633	cq_real
Current density	5.5124 A	Jmax_real
Resistivity of copper at nominal temperature	2.05584E-8 Ohm.m	pt
Resistance of a single coil	0.609106 Ohm	Rc
Phase resistance	1.21821 Ohm	Rphase
Phase inductance	0.0023917 H	Ls
Nagaoka constant	0.263873	Kn
Winding coefficient	0.95	kw
Volume of a single coil	44123.1 mm3	coil_volume
Weight of a single coil	207.683 g	coil_weight_constr
Coil hole at Ravg	14 mm	coil_hole_Ravg
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	20 mm	coil_hole_Rout_constr
Coil mass for construction	1.45378 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	8.55334 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.0283 V	EMF_nom
Current at the nominal wind speed	4.85091 A	Iac_nom
Terminal voltage at the nominal wind speed	9.40867 V	V_term_line
Nominal frequency	31.2568 Hz	fnom
Generator power (Calculated)	136.922 W	Pnom
Copper losses (Calculated)	85.9985 W	Pcopper
Eddy current losses (Calculated)	0.383582 W	Peddy
Generator efficiency (Calculated)	0.596038	efficiency_real
AC Power at the rectifier (Calculated)	123.23 W	Pnom_rect
DC Power at the batteries (Calculated)	110.907 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)	6.416 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	104.928 EUR	Totalcost
Total generator mass	4.80464 kgr	TotalMass
Total generator volume	0.757131 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	41.7862 EUR	Magcost
Magnet shipping cost	3.09179 EUR	shippingcost
Copper mass	1.23072 kgr	mcu
Cost of copper	18.1654 EUR	coppercost
Resin mass	0.853208 kgr	resinmass
Cost of resin	11.7853 EUR	resincost
Resin volume	627.359 cm3	ResinVolume
Total mass of one generator rotor	1.36036 kgr	TotalMassRotor
Cost of iron	2.87416 EUR	ironcost
Surface area of moulds	0.191393 m2	woodS
Total cost of moulds	30.3167 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-5868.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

6.00

Design TSR:

2.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N40

Number of generator poles:

Magnet length:

40mm

Magnet width:

20mm

Magnet thickness:

4mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

4.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

Winding fill factor:

Calculated

Stator thickness:

User defined

Stator thickness:

15mm

Current density:

6.00A/mm2

System Inputs

System voltage:

20.00V

Nominal voltage:

20.00V

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