New14 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Anand Reddy on Fri, 17/07/2020 - 16:33

Duration:

00:04:03

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	417.994 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	700.637 RPM	n_nom
Nominal tip speed ratio	4.4	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	27 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	12 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	0.193783 m/s	cutin_Vw
Mechanical power (Torque)	367.303 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	3 mm	hr
Magnet width-to-pole pitch ratio	0.294581	ai
Inner-to-outer magnet radius	0.732739	kd
Flux density in airgap	0.330691 T	Bmax
Flux density on magnet surface	0.482029 T	Bmg
First harmonic of flux density in airgap	0.200348 T	Bp
Flux per pole (Calculated)	0.000387148 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	37.4211 mm	dist_magnet_Rin
Magnet mass	720 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	4000 mm3	Vmag
Volume of all magnets	96000 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	300 mm	Dout
Average radius	129.666 mm	Ravg
Inner radius	109.666 mm	Rin
Outer radius	150 mm	Rout
Effective outer radius	149.666 mm	Rout_eff
Mass of rotor disks	3.33779 kgr	BackIronMass
Volume of rotor disks	424.115 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.97895 T	SaturMAX
Is the magnet rotor disk saturated?	Yes	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	15 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	500	Nc
Copper wire diameter	0.51 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.204282 mm2	sc
Copper wire diameter (Calculated)	0.51 mm	dc_theor
Coil leg width	16 mm	wc
Average length of coil turn	170.24 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	490.291 cm²	stator_surface_area
Heat coefficient	0.113916	cq_real
Current density	4.89519 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	8.01988 Ohm	Rc
Phase resistance	24.0597 Ohm	Rphase
Phase inductance	0.0390521 H	Ls
Nagaoka constant	0.269495	Kn
Volume of a single coil	40857.6 mm3	coil_volume
Weight of a single coil	156.075 g	coil_weight_constr
Coil hole at Rin	20 mm	coil_hole_Rin_constr
Coil hole at Rout	20 mm	coil_hole_Rout_constr
Coil mass for construction	1.56075 kgr	mcu_constr
RMS flux linkage of phase A	0.0959085 Wb	FluxRmsA
RMS flux linkage of phase B	0.0946108 Wb	FluxRmsB
RMS flux linkage of phase C	0.0955859 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	8.60221 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	132.059 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	132.016 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	132.107 V	V_rmsC
Current at the nominal wind speed	1 A	Iac_nom
Nominal frequency	70.0637 Hz	fnom
Generator power (Torque)	283.502 W	PelN_Torque_x
Electromagnetic power (Torque)	355.842 W	PHMN_Torque_x
Copper losses (Torque)	72.179 W	PcopperN_Torque_x
Eddy current losses (Torque)	0.161057 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.771847	efftotalN_Torque_x
AC Power at the rectifier (Torque)	255.152 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	229.637 W	PelN_Torque_x_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	4	No_bolts_hub
Mass of bearing hub	3708.65 g	BearingHubMass
Rotational losses (Torque)	11.4615 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	199.062 EUR	Totalcost
Total generator mass	8.29804 kgr	TotalMass
Total generator volume	2.61538 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	78.0371 EUR	Magcost
Magnet shipping cost	5.7971 EUR	shippingcost
Copper mass	1.39908 kgr	mcu
Cost of copper	20.6504 EUR	coppercost
Resin mass	2.84118 kgr	resinmass
Cost of resin	39.2449 EUR	resincost
Resin volume	2089.1 cm3	ResinVolume
Total mass of one generator rotor	2.02889 kgr	TotalMassRotor
Cost of iron	4.10548 EUR	ironcost
Surface area of moulds	0.36 m2	woodS
Total cost of moulds	57.024 EUR	woodcost

Revolutions per minute (RPM)
0
700.636943

I_RMS (A)
0
1

Output files

Octave/Matlab variable file:

simulation-6480.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Nominal TSR:

4.40

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

300.00mm

Magnetic material:

NdFeB N42

Number of generator poles:

Magnet length:

40mm

Magnet width:

20mm

Magnet thickness:

5mm

Rotor disk thickness:

3mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

0.55

Current at nominal wind speed:

1.00A

Stator thickness:

15mm

Number of turns per coil:

500

Copper wire diameter:

0.51mm

Number of wires at hand:

Coil leg width:

16mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

12.00V

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