20 foot diameter (3.05 meter) | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by larry on Fri, 23/03/2018 - 03:20

Duration:

00:07:11

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	56.3851 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	319.321 RPM	n_nom
Nominal tip speed ratio	8.15504	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	47 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	48 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.50066 m/s	cutin_Vw
Mechanical power (Torque)	11033.9 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	19 mm	hr
Magnet width-to-pole pitch ratio	0.826644	ai
Inner-to-outer magnet radius	0.770148	kd
Flux density in airgap	0.738975 T	Bmax
Flux density on magnet surface	0.779957 T	Bmg
First harmonic of flux density in airgap	0.754513 T	Bp
Flux per pole (Calculated)	0.00225881 Wb	Flux_pole
Magnets on a rotor disk	40	magnet_num
Distance between magnets	2 mm	dist_magnet_Rin
Magnet mass	32923.2 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	54872 mm3	Vmag
Volume of all magnets	4389760 mm3	VolumeMagnet
Remanent magnetic flux density	1.3 T	Br
Magnetic coercivity	1006580 A/m	Hc
Maximum Energy Product	342 KJ/m³	BHmax
Outer diameter	662.387 mm	Dout
Average radius	292.648 mm	Ravg
Inner radius	254.648 mm	Rin
Outer radius	331.193 mm	Rout
Effective outer radius	330.648 mm	Rout_eff
Mass of rotor disks	103.056 kgr	BackIronMass
Volume of rotor disks	13094.7 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.982657 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	10	q
Total number of coils in stator	30	coil_num
Number of turns per coil	18	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	5.08 mm2	sc
Copper wire cross-sectional area (Calculated)	4.81764 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.47732 mm	dc_theor
Coil leg width	12.7888 mm	wc
Average length of coil turn	242.584 mm	lavg
Stator nominal temperature	65.9303 C°	tc_real
Stator surface area	1861.42 cm²	stator_surface_area
Heat coefficient	0.229893	cq_real
Current density	5.69013 A	Jmax_real
Resistivity of copper at nominal temperature	1.98612E-8 Ohm.m	pt
Resistance of a single coil	0.0170717 Ohm	Rc
Phase resistance	0.170717 Ohm	Rphase
Phase inductance	0.000318474 H	Ls
Nagaoka constant	0.217144	Kn
Winding coefficient	0.618254	kw
Volume of a single coil	40330.7 mm3	coil_volume
Weight of a single coil	220.34 g	coil_weight_constr
Coil hole at Ravg	23 mm	coil_hole_Ravg
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	38 mm	coil_hole_Rout_constr
Coil mass for construction	6.83054 kgr	mcu_constr
RMS flux linkage of phase A	0.0208805 Wb	FluxRmsA
RMS flux linkage of phase B	0.0205397 Wb	FluxRmsB
RMS flux linkage of phase C	0.0208654 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	118.815 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	137.278 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	137.427 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	137.318 V	V_rmsC
Current at the nominal wind speed	28.9058 A	Iac_nom
Terminal voltage at the nominal wind speed	89.81 V	V_term_line
Nominal frequency	106.44 Hz	fnom
Generator power (Calculated)	7788.11 W	Pnom
Generator power (Torque)	10280.8 W	PelN_Torque_x
Electromagnetic power (Torque)	10903.3 W	PHMN_Torque_x
Copper losses (Calculated)	427.927 W	Pcopper
Copper losses (Torque)	427.927 W	PcopperN_Torque_x
Eddy current losses (Torque)	194.553 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.931748	efftotalN_Torque_x
Generator efficiency (Calculated)	0.75575	efficiency_real
AC Power at the rectifier (Calculated)	7398.7 W	Pnom_rect
AC Power at the rectifier (Torque)	9766.77 W	PelN_Torque_x_rect
DC Power at the batteries (Calculated)	6658.83 W	Pnom_dc
DC Power at the batteries (Torque)	8790.1 W	PelN_Torque_x_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)	130.606 W	Prot
Rotational losses (Torque)	130.606 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	3419.31 EUR	Totalcost
Total generator mass	144.462 kgr	TotalMass
Total generator volume	32.7368 dm3	TotalVolume
Blade rotor mass	54.2359 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	3023.03 EUR	Magcost
Magnet shipping cost	265.082 EUR	shippingcost
Copper mass	5.94918 kgr	mcu
Cost of copper	87.8099 EUR	coppercost
Resin mass	2.53444 kgr	resinmass
Cost of resin	35.008 EUR	resincost
Resin volume	1863.56 cm3	ResinVolume
Total mass of one generator rotor	67.9894 kgr	TotalMassRotor
Cost of iron	126.758 EUR	ironcost
Surface area of moulds	0.926188 m2	woodS
Total cost of moulds	146.708 EUR	woodcost

Revolutions per minute (RPM)
0
319.321185

I_RMS (A)
0
28.905848

Output files

Octave/Matlab variable file:

simulation-447.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

3.05m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

12.50m/s

Cut-in TSR:

6.00

Design TSR:

7.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N42

Number of generator poles:

Magnet length:

76mm

Magnet width:

38mm

Magnet thickness:

19mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

19mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

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:

48.00V

Nominal voltage:

200.00V

Transmission cable losses:

5.00%

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