EIR-1 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Eirbyte on Mon, 19/03/2018 - 22:10

Duration:

00:00:04

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	75.9988 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	104.268 RPM	n_nom
Nominal tip speed ratio	3.6014	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.0475692	ai
Inner-to-outer magnet radius	0.962525	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	12	magnet_num
Distance between magnets	588.618 mm	dist_magnet_Rin
Magnet mass	2484 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	331200 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	2455.13 mm	Dout
Average radius	1204.47 mm	Ravg
Inner radius	1181.47 mm	Rin
Outer radius	1227.56 mm	Rout
Effective outer radius	1227.47 mm	Rout_eff
Mass of rotor disks	745.149 kgr	BackIronMass
Volume of rotor disks	94682.3 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 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	125	Nc
Copper wire diameter	1.9 mm	dc
Number of wires at hand	8	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	22.72 mm2	sc
Copper wire cross-sectional area (Calculated)	24.3099 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.84 mm²	sc_multi_wires
Copper wire diameter (Calculated)	5.56489 mm	dc_theor
Coil leg width	397.203 mm	wc
Average length of coil turn	1399.22 mm	lavg
Stator nominal temperature	85.3994 C°	tc_real
Stator surface area	100039 cm²	stator_surface_area
Heat coefficient	0.30821	cq_real
Current density	6.41987 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.161029 Ohm	Rc
Phase resistance	0.483088 Ohm	Rphase
Phase inductance	0.0165506 H	Ls
Nagaoka constant	0.0234448	Kn
Winding coefficient	0.95	kw
Volume of a single coil	7225050 mm3	coil_volume
Weight of a single coil	36094 g	coil_weight_constr
Coil hole at Ravg	30 mm	coil_hole_Ravg
Coil hole at Rin	30 mm	coil_hole_Rin_constr
Coil hole at Rout	30 mm	coil_hole_Rout_constr
Coil mass for construction	360.94 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	145.859 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	10.4268 Hz	fnom
Generator power (Calculated)	4940.44 W	Pnom
Copper losses (Calculated)	30833.1 W	Pcopper
Eddy current losses (Calculated)	159.955 W	Peddy
Generator efficiency (Calculated)	0.136829	efficiency_real
AC Power at the rectifier (Calculated)	4446.39 W	Pnom_rect
DC Power at the batteries (Calculated)	4001.75 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	6	No_bolts_hub
Mass of bearing hub	14290.7 g	BearingHubMass
Rotational losses (Calculated)	173.213 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	7680.53 EUR	Totalcost
Total generator mass	1111.66 kgr	TotalMass
Total generator volume	279.313 dm3	TotalVolume
Blade rotor mass	68.6957 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	230.554 EUR	Magcost
Magnet shipping cost	20 EUR	shippingcost
Copper mass	319.73 kgr	mcu
Cost of copper	4719.21 EUR	coppercost
Resin mass	44.2956 kgr	resinmass
Cost of resin	611.85 EUR	resincost
Resin volume	32570.3 cm3	ResinVolume
Total mass of one generator rotor	373.817 kgr	TotalMassRotor
Cost of iron	916.534 EUR	ironcost
Surface area of moulds	7.59074 m2	woodS
Total cost of moulds	1202.37 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-417.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

3.30m

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 N40

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

13mm

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:

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