NAA | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by AHMEDNA8 on Fri, 23/10/2020 - 13:57

Duration:

00:00:06

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)	534.424 RPM	n_nom
Nominal tip speed ratio	7.45819	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.688605	ai
Inner-to-outer magnet radius	0.469991	kd
Flux density in airgap	0.574123 T	Bmax
Flux density on magnet surface	0.648587 T	Bmg
First harmonic of flux density in airgap	0.546523 T	Bp
Flux per pole (Calculated)	0.000823126 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	-1.7846 mm	dist_magnet_Rin
Magnet mass	1800 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	10000 mm3	Vmag
Volume of all magnets	240000 mm3	VolumeMagnet
Remanent magnetic flux density	1.3 T	Br
Magnetic coercivity	1006580 A/m	Hc
Maximum Energy Product	342 KJ/m³	BHmax
Outer diameter	190.325 mm	Dout
Average radius	69.3381 mm	Ravg
Inner radius	44.3381 mm	Rin
Outer radius	95.1626 mm	Rout
Effective outer radius	94.3381 mm	Rout_eff
Mass of rotor disks	4.47804 kgr	BackIronMass
Volume of rotor disks	569.001 cm3	BackIronVolume

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	24	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.5	kf
Copper wire cross-sectional area	3.54 mm2	sc
Copper wire cross-sectional area (Calculated)	3.52573 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	1.77 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.11929 mm	dc_theor
Coil leg width	11.4413 mm	wc
Average length of coil turn	178.242 mm	lavg
Stator nominal temperature	53.4077 C°	tc_real
Stator surface area	367.077 cm²	stator_surface_area
Heat coefficient	0.172567	cq_real
Current density	4.97984 A	Jmax_real
Resistivity of copper at nominal temperature	1.87421E-8 Ohm.m	pt
Resistance of a single coil	0.0226483 Ohm	Rc
Phase resistance	0.0679448 Ohm	Rphase
Phase inductance	0.000105417 H	Ls
Nagaoka constant	0.28803	Kn
Winding coefficient	0.95	kw
Volume of a single coil	30589.7 mm3	coil_volume
Weight of a single coil	146.664 g	coil_weight_constr
Coil hole at Ravg	25 mm	coil_hole_Ravg
Coil hole at Rin	7.56208 mm	coil_hole_Rin_constr
Coil hole at Rout	42.1199 mm	coil_hole_Rout_constr
Coil mass for construction	1.46664 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	13.3615 V	EMF_nom
Current at the nominal wind speed	17.6286 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	53.4424 Hz	fnom
Generator power (Calculated)	597.104 W	Pnom
Copper losses (Calculated)	63.3455 W	Pcopper
Eddy current losses (Calculated)	38.4338 W	Peddy
Generator efficiency (Calculated)	0.837349	efficiency_real
AC Power at the rectifier (Calculated)	537.393 W	Pnom_rect
DC Power at the batteries (Calculated)	483.654 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)	14.2049 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	255.483 EUR	Totalcost
Total generator mass	8.8077 kgr	TotalMass
Total generator volume	1.5363 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	175.797 EUR	Magcost
Magnet shipping cost	14.4928 EUR	shippingcost
Copper mass	1.21844 kgr	mcu
Cost of copper	17.9842 EUR	coppercost
Resin mass	1.31122 kgr	resinmass
Cost of resin	18.1118 EUR	resincost
Resin volume	964.132 cm3	ResinVolume
Total mass of one generator rotor	3.13902 kgr	TotalMassRotor
Cost of iron	5.50798 EUR	ironcost
Surface area of moulds	0.240419 m2	woodS
Total cost of moulds	38.0823 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6511.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Aerodynamic coefficient:

0.35

Cut-in wind speed:

3.00m/s

Nominal wind speed:

9.00m/s

Cut-in TSR:

8.75

Design TSR:

7.00

Air density:

1.225kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N42

Number of generator poles:

Magnet length:

50mm

Magnet width:

25mm

Magnet thickness:

8mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

1.50mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

5.00A/mm2

System Inputs

System voltage:

12.00V

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:

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