h | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by shrikant@alltesta.in on Fri, 17/07/2020 - 08:54

Duration:

00:00:02

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	139.331 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	420.382 RPM	n_nom
Nominal tip speed ratio	4.4	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.607075	ai
Inner-to-outer magnet radius	0.766093	kd
Magnets on a rotor disk	24	magnet_num
Distance between magnets	9.0106 mm	dist_magnet_Rin
Magnet mass	1323 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	3675 mm3	Vmag
Volume of all magnets	176400 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	300 mm	Dout
Average radius	132.132 mm	Ravg
Inner radius	114.632 mm	Rin
Outer radius	150 mm	Rout
Effective outer radius	149.632 mm	Rout_eff
Mass of rotor disks	11.126 kgr	BackIronMass
Volume of rotor disks	1413.72 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	6	q
Total number of coils in stator	18	coil_num
Number of turns per coil	43	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.7	kf
Copper wire cross-sectional area	3.53429 mm2	sc
Copper wire diameter (Calculated)	2.12132 mm	dc_theor
Coil leg width	21 mm	wc
Average length of coil turn	138.237 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	1045.07 cm²	stator_surface_area
Heat coefficient	0.143661	cq_real
Current density	5.09296 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.0323711 Ohm	Rc
Phase resistance	0.194227 Ohm	Rphase
Phase inductance	0.000389623 H	Ls
Nagaoka constant	0.238919	Kn
Volume of a single coil	37738.7 mm3	coil_volume
Weight of a single coil	196.552 g	coil_weight_constr
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	21 mm	coil_hole_Rout_constr
Coil mass for construction	3.73448 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	61.9359 V	EMF_nom
Current at the nominal wind speed	18 A	Iac_nom
Nominal frequency	84.0764 Hz	fnom

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

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	277.983 EUR	Totalcost
Total generator mass	17.6727 kgr	TotalMass
Total generator volume	3.46361 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	131.918 EUR	Magcost
Magnet shipping cost	10.6522 EUR	shippingcost
Copper mass	3.38069 kgr	mcu
Cost of copper	49.899 EUR	coppercost
Resin mass	1.84301 kgr	resinmass
Cost of resin	25.4574 EUR	resincost
Resin volume	1355.16 cm3	ResinVolume
Total mass of one generator rotor	6.22448 kgr	TotalMassRotor
Cost of iron	13.6849 EUR	ironcost
Surface area of moulds	0.36 m2	woodS
Total cost of moulds	57.024 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6468.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

Cut-in wind speed:

2.00m/s

Nominal wind speed:

12.00m/s

Cut-in TSR:

8.75

Nominal TSR:

4.40

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

300.00mm

Magnetic material:

NdFeB N35

Number of generator poles:

Magnet length:

35mm

Magnet width:

21mm

Magnet thickness:

5mm

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

Winding fill factor:

0.70

Current at nominal wind speed:

18.00A

Stator thickness:

13mm

Number of turns per coil:

Copper wire diameter:

1.50mm

Number of wires at hand:

Coil leg width:

21mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

48.00V

Transmission cable losses:

2.00%

Rectifier losses:

5.00%

Financial

Copper price:

12.00€/kg

Iron price:

1.00€/kg

Resin price:

11.23€/kg

Plywood price:

17.60 €/m²

Simulation Inputs

Simulation Radius:

Average radius

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