Test 1 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Adam Szota on Mon, 24/12/2018 - 06:26

Duration:

00:00:01

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	95.5414 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	121.738 RPM	n_nom
Nominal tip speed ratio	2.54838	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	5 mm	hr
Magnet width-to-pole pitch ratio	0.569963	ai
Inner-to-outer magnet radius	0.456622	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)	0.00062 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	2 mm	dist_magnet_Rin
Magnet mass	3600 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	20000 mm3	Vmag
Volume of all magnets	480000 mm3	VolumeMagnet
Remanent magnetic flux density	1.195 T	Br
Magnetic coercivity	918880 A/m	Hc
Maximum Energy Product	287 KJ/m³	BHmax
Outer diameter	185.117 mm	Dout
Average radius	67.0169 mm	Ravg
Inner radius	42.0169 mm	Rin
Outer radius	92.5587 mm	Rout
Effective outer radius	92.0169 mm	Rout_eff
Mass of rotor disks	2.11816 kgr	BackIronMass
Volume of rotor disks	269.144 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	10 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	137	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	1.77 mm2	sc
Copper wire cross-sectional area (Calculated)	1.74719 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	1.77 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.49189 mm	dc_theor
Coil leg width	46.6327 mm	wc
Average length of coil turn	175.973 mm	lavg
Stator nominal temperature	31.1862 C°	tc_real
Stator surface area	1477.1 cm²	stator_surface_area
Heat coefficient	0.0476947	cq_real
Current density	2.96134 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.284913 Ohm	Rc
Phase resistance	0.85474 Ohm	Rphase
Phase inductance	0.00218759 H	Ls
Nagaoka constant	0.125461	Kn
Winding coefficient	0.95	kw
Volume of a single coil	82061.1 mm3	coil_volume
Weight of a single coil	387.055 g	coil_weight_constr
Coil hole at Ravg	20 mm	coil_hole_Ravg
Coil hole at Rin	20 mm	coil_hole_Rin_constr
Coil hole at Rout	20 mm	coil_hole_Rout_constr
Coil mass for construction	3.87055 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	13.0866 V	EMF_nom
Current at the nominal wind speed	5.24158 A	Iac_nom
Terminal voltage at the nominal wind speed	10.4693 V	V_term_line
Nominal frequency	12.1738 Hz	fnom
Generator power (Calculated)	164.627 W	Pnom
Copper losses (Calculated)	70.4498 W	Pcopper
Eddy current losses (Calculated)	1.3418 W	Peddy
Generator efficiency (Calculated)	0.687326	efficiency_real
AC Power at the rectifier (Calculated)	161.334 W	Pnom_rect
DC Power at the batteries (Calculated)	145.201 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)	3.09944 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	408.12 EUR	Totalcost
Total generator mass	9.21626 kgr	TotalMass
Total generator volume	1.66869 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	316.666 EUR	Magcost
Magnet shipping cost	28.9855 EUR	shippingcost
Copper mass	3.43337 kgr	mcu
Cost of copper	50.6765 EUR	coppercost
Resin mass	0.0647307 kgr	resinmass
Cost of resin	0.894119 EUR	resincost
Resin volume	47.5961 cm3	ResinVolume
Total mass of one generator rotor	2.85908 kgr	TotalMassRotor
Cost of iron	2.60534 EUR	ironcost
Surface area of moulds	0.235339 m2	woodS
Total cost of moulds	37.2777 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-5943.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Aerodynamic coefficient:

0.35

Cut-in wind speed:

2.00m/s

Nominal wind speed:

6.00m/s

Cut-in TSR:

6.00

Design TSR:

6.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N35

Number of generator poles:

Magnet length:

50mm

Magnet width:

20mm

Magnet thickness:

20mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

5mm

Mechanical clearance:

1.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

20.00mm

Winding fill factor:

Calculated

Stator thickness:

User defined

Stator thickness:

10mm

Current density:

3.00A/mm2

System Inputs

System voltage:

24.00V

Nominal voltage:

24.00V

Transmission cable losses:

2.00%

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