test | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by edwardmantey on Thu, 20/08/2020 - 17:00

Duration:

00:00:01

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)	293.253 RPM	n_nom
Nominal tip speed ratio	3.68325	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	1.05671	ai
Inner-to-outer magnet radius	0.594242	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)	0.0008556 Wb	Flux_pole
Magnets on a rotor disk	20	magnet_num
Distance between magnets	-8.8357 mm	dist_magnet_Rin
Magnet mass	4140 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	552000 mm3	VolumeMagnet
Remanent magnetic flux density	1.35 T	Br
Magnetic coercivity	1041910 A/m	Hc
Maximum Energy Product	366 KJ/m³	BHmax
Outer diameter	228.712 mm	Dout
Average radius	90.3682 mm	Ravg
Inner radius	67.3682 mm	Rin
Outer radius	114.356 mm	Rout
Effective outer radius	113.368 mm	Rout_eff
Mass of rotor disks	6.46657 kgr	BackIronMass
Volume of rotor disks	821.674 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	30 mm	tw
Number of phases	3	nphase
Number of coils per phase	5	q
Total number of coils in stator	15	coil_num
Number of turns per coil	16	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	3.54 mm2	sc
Copper wire cross-sectional area (Calculated)	3.21453 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	1.77 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.0236 mm	dc_theor
Coil leg width	3.66708 mm	wc
Average length of coil turn	150.775 mm	lavg
Stator nominal temperature	137.496 C°	tc_real
Stator surface area	165.871 cm²	stator_surface_area
Heat coefficient	0.479539	cq_real
Current density	5.44836 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.0142549 Ohm	Rc
Phase resistance	0.0712747 Ohm	Rphase
Phase inductance	5.18279E-5 H	Ls
Nagaoka constant	0.534337	Kn
Winding coefficient	0.95	kw
Volume of a single coil	16587.1 mm3	coil_volume
Weight of a single coil	85.8901 g	coil_weight_constr
Coil hole at Ravg	30 mm	coil_hole_Ravg
Coil hole at Rin	20.3073 mm	coil_hole_Rin_constr
Coil hole at Rout	39.4516 mm	coil_hole_Rout_constr
Coil mass for construction	1.37424 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.113 V	EMF_nom
Current at the nominal wind speed	19.2872 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	48.8754 Hz	fnom
Generator power (Calculated)	653.281 W	Pnom
Copper losses (Calculated)	79.5417 W	Pcopper
Eddy current losses (Calculated)	13.1101 W	Peddy
Generator efficiency (Calculated)	0.863824	efficiency_real
AC Power at the rectifier (Calculated)	587.953 W	Pnom_rect
DC Power at the batteries (Calculated)	529.157 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)	10.3333 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	535.229 EUR	Totalcost
Total generator mass	15.3202 kgr	TotalMass
Total generator volume	3.12236 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	416.804 EUR	Magcost
Magnet shipping cost	33.3333 EUR	shippingcost
Copper mass	1.1452 kgr	mcu
Cost of copper	16.9032 EUR	coppercost
Resin mass	3.5684 kgr	resinmass
Cost of resin	49.29 EUR	resincost
Resin volume	2623.82 cm3	ResinVolume
Total mass of one generator rotor	5.30329 kgr	TotalMassRotor
Cost of iron	7.95389 EUR	ironcost
Surface area of moulds	0.279537 m2	woodS
Total cost of moulds	44.2786 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6498.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Design TSR:

7.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N45

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

Calculated

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

User defined

Stator thickness:

30mm

Current density:

6.00A/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