1.2m190819 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by kimon007 on Mon, 19/08/2019 - 06:49

Duration:

00:02:24

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	174.164 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	780.678 RPM	n_nom
Nominal tip speed ratio	8.30959	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	8 mm	hr
Magnet width-to-pole pitch ratio	0.229152	ai
Inner-to-outer magnet radius	0.889131	kd
Flux density in airgap	0.212051 T	Bmax
Flux density on magnet surface	0.310902 T	Bmg
First harmonic of flux density in airgap	0.0928417 T	Bp
Flux per pole (Calculated)	0.000432316 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	142.959 mm	dist_magnet_Rin
Magnet mass	1656 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	220800 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	543.133 mm	Dout
Average radius	255.591 mm	Ravg
Inner radius	240.591 mm	Rin
Outer radius	271.566 mm	Rout
Effective outer radius	270.591 mm	Rout_eff
Mass of rotor disks	14.587 kgr	BackIronMass
Volume of rotor disks	1853.5 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.13531 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	10 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	200	Nc
Copper wire diameter	1.9 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	2.83 mm2	sc
Copper wire cross-sectional area (Calculated)	2.58857 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.83 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.81591 mm	dc_theor
Coil leg width	102.909 mm	wc
Average length of coil turn	475.135 mm	lavg
Stator nominal temperature	40.5711 C°	tc_real
Stator surface area	5867.48 cm²	stator_surface_area
Heat coefficient	0.105272	cq_real
Current density	4.57344 A	Jmax_real
Resistivity of copper at nominal temperature	1.83018E-8 Ohm.m	pt
Resistance of a single coil	0.614547 Ohm	Rc
Phase resistance	1.22909 Ohm	Rphase
Phase inductance	0.0106956 H	Ls
Nagaoka constant	0.0592219	Kn
Winding coefficient	0.576405	kw
Volume of a single coil	488957 mm3	coil_volume
Weight of a single coil	2428.24 g	coil_weight_constr
Coil hole at Ravg	46 mm	coil_hole_Ravg
Coil hole at Rin	46 mm	coil_hole_Rin_constr
Coil hole at Rout	46 mm	coil_hole_Rout_constr
Coil mass for construction	16.9977 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	23.0364 V	EMF_nom
Current at the nominal wind speed	12.9428 A	Iac_nom
Terminal voltage at the nominal wind speed	5.6452 V	V_term_line
Nominal frequency	52.0452 Hz	fnom
Generator power (Calculated)	219.195 W	Pnom
Copper losses (Calculated)	617.682 W	Pcopper
Eddy current losses (Calculated)	1.9355 W	Peddy
Generator efficiency (Calculated)	0.250474	efficiency_real
AC Power at the rectifier (Calculated)	197.275 W	Pnom_rect
DC Power at the batteries (Calculated)	177.548 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)	36.3091 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	546.802 EUR	Totalcost
Total generator mass	34.2619 kgr	TotalMass
Total generator volume	7.1823 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	153.703 EUR	Magcost
Magnet shipping cost	13.3333 EUR	shippingcost
Copper mass	14.4252 kgr	mcu
Cost of copper	212.916 EUR	coppercost
Resin mass	3.59368 kgr	resinmass
Cost of resin	49.6391 EUR	resincost
Resin volume	2642.41 cm3	ResinVolume
Total mass of one generator rotor	16.243 kgr	TotalMassRotor
Cost of iron	17.942 EUR	ironcost
Surface area of moulds	0.710873 m2	woodS
Total cost of moulds	112.602 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6131.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Aerodynamic coefficient:

0.20

Cut-in wind speed:

3.50m/s

Nominal wind speed:

11.80m/s

Cut-in TSR:

6.25

Design TSR:

3.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Single Rotor

Magnetic material:

NdFeB N40

Number of generator poles:

Magnet length:

30mm

Magnet width:

46mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

8mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

10mm

Current density:

5.00A/mm2

System Inputs

System voltage:

12.00V

Nominal voltage:

12.00V

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