na8 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by AHMEDNA8 on Wed, 11/11/2020 - 21:19

Duration:

00:07:46

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)	357.521 RPM	n_nom
Nominal tip speed ratio	9.14723	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	104 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	12 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.73688 m/s	cutin_Vw
Mechanical power (Torque)	2613.76 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.300112	ai
Inner-to-outer magnet radius	0.919563	kd
Flux density in airgap	0.154347 T	Bmax
Flux density on magnet surface	0.178753 T	Bmg
First harmonic of flux density in airgap	0.0973559 T	Bp
Flux per pole (Calculated)	0.000178776 Wb	Flux_pole
Magnets on a rotor disk	36	magnet_num
Distance between magnets	54.8116 mm	dist_magnet_Rin
Magnet mass	3600 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	10000 mm3	Vmag
Volume of all magnets	720000 mm3	VolumeMagnet
Remanent magnetic flux density	0.39 T	Br
Magnetic coercivity	227950 A/m	Hc
Maximum Energy Product	30 KJ/m³	BHmax
Outer diameter	994.887 mm	Dout
Average radius	477.287 mm	Ravg
Inner radius	457.287 mm	Rin
Outer radius	497.444 mm	Rout
Effective outer radius	497.287 mm	Rout_eff
Mass of rotor disks	122.361 kgr	BackIronMass
Volume of rotor disks	15547.8 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.270501 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	15 mm	tw
Number of phases	3	nphase
Number of coils per phase	9	q
Total number of coils in stator	27	coil_num
Number of turns per coil	22	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	5	No_wires_at_hand
Winding fill factor	0.44	kf
Copper wire cross-sectional area	12.7 mm2	sc
Copper wire cross-sectional area (Calculated)	11.7986 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	3.87687 mm	dc_theor
Coil leg width	42.7567 mm	wc
Average length of coil turn	238.29 mm	lavg
Stator nominal temperature	36.342 C°	tc_real
Stator surface area	5501.78 cm²	stator_surface_area
Heat coefficient	0.0804347	cq_real
Current density	3.71611 A	Jmax_real
Resistivity of copper at nominal temperature	1.78268E-8 Ohm.m	pt
Resistance of a single coil	0.00735866 Ohm	Rc
Phase resistance	0.0662279 Ohm	Rphase
Phase inductance	0.000273429 H	Ls
Nagaoka constant	0.16582	Kn
Winding coefficient	0.95	kw
Volume of a single coil	152827 mm3	coil_volume
Weight of a single coil	649.319 g	coil_weight_constr
Coil hole at Ravg	25 mm	coil_hole_Ravg
Coil hole at Rin	20.4004 mm	coil_hole_Rin_constr
Coil hole at Rout	29.7061 mm	coil_hole_Rout_constr
Coil mass for construction	18.1809 kgr	mcu_constr
RMS flux linkage of phase A	0.00340756 Wb	FluxRmsA
RMS flux linkage of phase B	0.00336027 Wb	FluxRmsB
RMS flux linkage of phase C	0.00336146 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	16.0164 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	20.3281 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	20.4986 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	20.4649 V	V_rmsC
Current at the nominal wind speed	47.1946 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	107.256 Hz	fnom
Generator power (Calculated)	1598.54 W	Pnom
Generator power (Torque)	2046.5 W	PelN_Torque_x
Electromagnetic power (Torque)	2503.17 W	PHMN_Torque_x
Copper losses (Calculated)	442.534 W	Pcopper
Copper losses (Torque)	442.534 W	PcopperN_Torque_x
Eddy current losses (Torque)	14.1379 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.782971	efftotalN_Torque_x
Generator efficiency (Calculated)	0.705082	efficiency_real
AC Power at the rectifier (Calculated)	1438.68 W	Pnom_rect
AC Power at the rectifier (Torque)	1841.85 W	PelN_Torque_x_rect
DC Power at the batteries (Calculated)	1294.82 W	Pnom_dc
DC Power at the batteries (Torque)	1657.66 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)	110.588 W	Prot
Rotational losses (Torque)	110.588 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	866.768 EUR	Totalcost
Total generator mass	151.677 kgr	TotalMass
Total generator volume	45.0885 dm3	TotalVolume
Blade rotor mass	20.3543 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	80.2343 EUR	Magcost
Magnet shipping cost	43.4783 EUR	shippingcost
Copper mass	16.0707 kgr	mcu
Cost of copper	237.203 EUR	coppercost
Resin mass	9.64551 kgr	resinmass
Cost of resin	133.233 EUR	resincost
Resin volume	7092.29 cm3	ResinVolume
Total mass of one generator rotor	62.9804 kgr	TotalMassRotor
Cost of iron	150.504 EUR	ironcost
Surface area of moulds	1.67673 m2	woodS
Total cost of moulds	265.595 EUR	woodcost

Revolutions per minute (RPM)
0
357.52075

I_RMS (A)
0
47.194589

Output files

Octave/Matlab variable file:

simulation-6566.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:

Ferrite C8

Number of generator poles:

Magnet length:

40mm

Magnet width:

25mm

Magnet thickness:

10mm

Rotor disk thickness:

Calculated

Mechanical clearance:

1.50mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

4.00A/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