na8 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by AHMEDNA8 on Wed, 11/11/2020 - 17:41

Duration:

00:08:12

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	113.998 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	355.011 RPM	n_nom
Nominal tip speed ratio	9.08302	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	109 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	12 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.86846 m/s	cutin_Vw
Mechanical power (Torque)	2333.91 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.281916	ai
Inner-to-outer magnet radius	0.742751	kd
Flux density in airgap	0.553317 T	Bmax
Flux density on magnet surface	0.671841 T	Bmg
First harmonic of flux density in airgap	0.314055 T	Bp
Flux per pole (Calculated)	0.000842848 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	50.5889 mm	dist_magnet_Rin
Magnet mass	2250 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	12500 mm3	Vmag
Volume of all magnets	300000 mm3	VolumeMagnet
Remanent magnetic flux density	1.35 T	Br
Magnetic coercivity	1041910 A/m	Hc
Maximum Energy Product	366 KJ/m³	BHmax
Outer diameter	389.531 mm	Dout
Average radius	169.364 mm	Ravg
Inner radius	144.364 mm	Rin
Outer radius	194.766 mm	Rout
Effective outer radius	194.364 mm	Rout_eff
Mass of rotor disks	18.7577 kgr	BackIronMass
Volume of rotor disks	2383.44 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.00071 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	16 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	42	Nc
Copper wire diameter	1.6 mm	dc
Number of wires at hand	4	No_wires_at_hand
Winding fill factor	0.46	kf
Copper wire cross-sectional area	8.04 mm2	sc
Copper wire cross-sectional area (Calculated)	7.92092 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.01 mm²	sc_multi_wires
Copper wire diameter (Calculated)	3.17653 mm	dc_theor
Coil leg width	46.3392 mm	wc
Average length of coil turn	276.006 mm	lavg
Stator nominal temperature	72.2822 C°	tc_real
Stator surface area	2302.18 cm²	stator_surface_area
Heat coefficient	0.256678	cq_real
Current density	5.91113 A	Jmax_real
Resistivity of copper at nominal temperature	2.01614E-8 Ohm.m	pt
Resistance of a single coil	0.0290692 Ohm	Rc
Phase resistance	0.0872075 Ohm	Rphase
Phase inductance	0.000403702 H	Ls
Nagaoka constant	0.160223	Kn
Winding coefficient	0.95	kw
Volume of a single coil	204638 mm3	coil_volume
Weight of a single coil	872.9 g	coil_weight_constr
Coil hole at Ravg	25 mm	coil_hole_Ravg
Coil hole at Rin	7.6058 mm	coil_hole_Rin_constr
Coil hole at Rout	42.4286 mm	coil_hole_Rout_constr
Coil mass for construction	8.729 kgr	mcu_constr
RMS flux linkage of phase A	0.0242936 Wb	FluxRmsA
RMS flux linkage of phase B	0.0240055 Wb	FluxRmsB
RMS flux linkage of phase C	0.0241483 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	15.9049 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	16.1041 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	16.1805 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	16.1468 V	V_rmsC
Current at the nominal wind speed	47.5255 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	35.5011 Hz	fnom
Generator power (Calculated)	1609.75 W	Pnom
Generator power (Torque)	1692.37 W	PelN_Torque_x
Electromagnetic power (Torque)	2298.62 W	PHMN_Torque_x
Copper losses (Calculated)	590.92 W	Pcopper
Copper losses (Torque)	590.92 W	PcopperN_Torque_x
Eddy current losses (Torque)	15.328 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.725122	efftotalN_Torque_x
Generator efficiency (Calculated)	0.705174	efficiency_real
AC Power at the rectifier (Calculated)	1448.77 W	Pnom_rect
AC Power at the rectifier (Torque)	1523.14 W	PelN_Torque_x_rect
DC Power at the batteries (Calculated)	1303.9 W	Pnom_dc
DC Power at the batteries (Torque)	1370.82 W	PelN_Torque_x_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)	35.2926 W	Prot
Rotational losses (Torque)	35.2926 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	492.592 EUR	Totalcost
Total generator mass	32.5889 kgr	TotalMass
Total generator volume	7.15033 dm3	TotalVolume
Blade rotor mass	20.3543 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	227.135 EUR	Magcost
Magnet shipping cost	18.1159 EUR	shippingcost
Copper mass	7.499 kgr	mcu
Cost of copper	110.685 EUR	coppercost
Resin mass	4.08224 kgr	resinmass
Cost of resin	56.3876 EUR	resincost
Resin volume	3001.65 cm3	ResinVolume
Total mass of one generator rotor	10.5038 kgr	TotalMassRotor
Cost of iron	23.072 EUR	ironcost
Surface area of moulds	0.475453 m2	woodS
Total cost of moulds	75.3118 EUR	woodcost

Revolutions per minute (RPM)
0
355.010918

I_RMS (A)
0
47.525521

Output files

Octave/Matlab variable file:

simulation-6561.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

2.20m

Aerodynamic coefficient:

0.34

Cut-in wind speed:

3.00m/s

Nominal wind speed:

9.00m/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 N45

Number of generator poles:

Magnet length:

50mm

Magnet width:

25mm

Magnet thickness:

10mm

Rotor disk thickness:

Calculated

Mechanical clearance:

2.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

6.00A/mm2

System Inputs

System voltage:

12.00V

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