Correction to My first turbine | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by peterfosseus on Wed, 21/03/2018 - 18:14

Duration:

00:02:51

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	125.398 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	424.098 RPM	n_nom
Nominal tip speed ratio	8.87779	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.10922	ai
Inner-to-outer magnet radius	0.848075	kd
Flux density in airgap	0.388709 T	Bmax
Flux density on magnet surface	0.60333 T	Bmg
First harmonic of flux density in airgap	0.0993781 T	Bp
Flux per pole (Calculated)	0.000666784 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	177.675 mm	dist_magnet_Rin
Magnet mass	1324.8 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	11040 mm3	Vmag
Volume of all magnets	176640 mm3	VolumeMagnet
Remanent magnetic flux density	1.45 T	Br
Magnetic coercivity	1120020 A/m	Hc
Maximum Energy Product	422 KJ/m³	BHmax
Outer diameter	606.036 mm	Dout
Average radius	279.781 mm	Ravg
Inner radius	256.781 mm	Rin
Outer radius	303.018 mm	Rout
Effective outer radius	302.781 mm	Rout_eff
Mass of rotor disks	45.4038 kgr	BackIronMass
Volume of rotor disks	5769.22 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.888262 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	12 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	318	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	2.54 mm2	sc
Copper wire cross-sectional area (Calculated)	2.49143 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.78152 mm	dc_theor
Coil leg width	122.382 mm	wc
Average length of coil turn	524.279 mm	lavg
Stator nominal temperature	63.8644 C°	tc_real
Stator surface area	7699.46 cm²	stator_surface_area
Heat coefficient	0.220879	cq_real
Current density	5.88527 A	Jmax_real
Resistivity of copper at nominal temperature	1.93245E-8 Ohm.m	pt
Resistance of a single coil	1.26842 Ohm	Rc
Phase resistance	2.53684 Ohm	Rphase
Phase inductance	0.0284312 H	Ls
Nagaoka constant	0.0613716	Kn
Winding coefficient	0.95	kw
Volume of a single coil	769946 mm3	coil_volume
Weight of a single coil	3809.64 g	coil_weight_constr
Coil hole at Ravg	24 mm	coil_hole_Ravg
Coil hole at Rin	24 mm	coil_hole_Rin_constr
Coil hole at Rout	24 mm	coil_hole_Rout_constr
Coil mass for construction	26.6675 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	14.9683 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	50.5808 V	EMF_nom
Current at the nominal wind speed	14.9486 A	Iac_nom
Terminal voltage at the nominal wind speed	13.1721 V	V_term_line
Nominal frequency	28.2732 Hz	fnom
Generator power (Calculated)	590.715 W	Pnom
Copper losses (Calculated)	1700.65 W	Pcopper
Eddy current losses (Calculated)	1.39984 W	Peddy
Generator efficiency (Calculated)	0.251106	efficiency_real
AC Power at the rectifier (Calculated)	531.643 W	Pnom_rect
DC Power at the batteries (Calculated)	478.479 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	5	No_bolts_hub
Mass of bearing hub	8344.46 g	BearingHubMass
Rotational losses (Calculated)	59.6838 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	759.832 EUR	Totalcost
Total generator mass	75.6937 kgr	TotalMass
Total generator volume	13.8461 dm3	TotalVolume
Blade rotor mass	15.2925 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	152.35 EUR	Magcost
Magnet shipping cost	10.6667 EUR	shippingcost
Copper mass	22.715 kgr	mcu
Cost of copper	335.273 EUR	coppercost
Resin mass	6.25013 kgr	resinmass
Cost of resin	86.3324 EUR	resincost
Resin volume	4595.68 cm3	ResinVolume
Total mass of one generator rotor	23.3643 kgr	TotalMassRotor
Cost of iron	55.8467 EUR	ironcost
Surface area of moulds	0.820902 m2	woodS
Total cost of moulds	130.031 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-440.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

2.00m

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:

Single Rotor with metal disk

Magnetic material:

NdFeB N52

Number of generator poles:

Magnet length:

46mm

Magnet width:

24mm

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:

12mm

Current density:

6.00A/mm2

System Inputs

System voltage:

35.00V

Nominal voltage:

28.00V

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