5KW scoping | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by josh manning 1 on Wed, 11/09/2024 - 08:48

Duration:

00:05:51

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	32.7571 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	84.0764 RPM	n_nom
Nominal tip speed ratio	4.4	tsr_nom
Mechanical power (Torque)	3180.02 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.400579	ai
Inner-to-outer magnet radius	0.907959	kd
Flux density in airgap	0.577673 T	Bmax
Flux density on magnet surface	0.645287 T	Bmg
First harmonic of flux density in airgap	0.412697 T	Bp
Flux per pole (Calculated)	0.000890846 Wb	Flux_pole
Magnets on a rotor disk	40	magnet_num
Distance between magnets	41.2788 mm	dist_magnet_Rin
Magnet mass	8280 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	1104000 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	1000 mm	Dout
Average radius	476.775 mm	Ravg
Inner radius	453.775 mm	Rin
Outer radius	500 mm	Rout
Effective outer radius	499.775 mm	Rout_eff
Mass of rotor disks	123.622 kgr	BackIronMass
Volume of rotor disks	15708 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.12112 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	43	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	3.53429 mm2	sc
Copper wire diameter (Calculated)	2.12132 mm	dc_theor
Coil leg width	21 mm	wc
Average length of coil turn	217.94 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	2746.04 cm²	stator_surface_area
Heat coefficient	0.352703	cq_real
Current density	7.07355 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.0510352 Ohm	Rc
Phase resistance	0.510352 Ohm	Rphase
Phase inductance	0.00136422 H	Ls
Nagaoka constant	0.201938	Kn
Volume of a single coil	59497.6 mm3	coil_volume
Weight of a single coil	309.877 g	coil_weight_constr
Coil hole at Rin	30 mm	coil_hole_Rin_constr
Coil hole at Rout	30 mm	coil_hole_Rout_constr
Coil mass for construction	9.60619 kgr	mcu_constr
RMS flux linkage of phase A	0.024881 Wb	FluxRmsA
RMS flux linkage of phase B	0.0245821 Wb	FluxRmsB
RMS flux linkage of phase C	0.0248072 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	85.5334 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	219.536 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	43.2811 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	43.3424 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	43.292 V	V_rmsC
Current at the nominal wind speed	25 A	Iac_nom
Nominal frequency	28.0255 Hz	fnom
Generator power (Torque)	2181.51 W	PelN_Torque_x
Electromagnetic power (Torque)	3141.66 W	PHMN_Torque_x
Copper losses (Torque)	956.91 W	PcopperN_Torque_x
Eddy current losses (Torque)	3.23694 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.686005	efftotalN_Torque_x
AC Power at the rectifier (Torque)	1963.36 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	1767.02 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 (Torque)	38.3641 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	1440.34 EUR	Totalcost
Total generator mass	149.542 kgr	TotalMass
Total generator volume	46.3385 dm3	TotalVolume
Blade rotor mass	81.9581 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	768.515 EUR	Magcost
Magnet shipping cost	66.6667 EUR	shippingcost
Copper mass	8.88314 kgr	mcu
Cost of copper	131.115 EUR	coppercost
Resin mass	8.75691 kgr	resinmass
Cost of resin	120.958 EUR	resincost
Resin volume	6438.9 cm3	ResinVolume
Total mass of one generator rotor	65.9508 kgr	TotalMassRotor
Cost of iron	152.055 EUR	ironcost
Surface area of moulds	1.69 m2	woodS
Total cost of moulds	267.696 EUR	woodcost

Revolutions per minute (RPM)
0
84.076433

I_RMS (A)
0
25

Output files

Octave/Matlab variable file:

simulation-9438.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

3.50m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

7.00m/s

Cut-in TSR:

4.00

Nominal TSR:

4.40

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

1000.00mm

Magnetic material:

NdFeB N40

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

0.55

Current at nominal wind speed:

25.00A

Stator thickness:

13mm

Number of turns per coil:

Copper wire diameter:

1.50mm

Number of wires at hand:

Coil leg width:

21mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

200.00V

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

Simulation Radius:

Average radius

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