micro jennie 1 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by natashabashya on Sun, 16/05/2021 - 08:03

Duration:

00:03:53

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	208.997 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	350.318 RPM	n_nom
Nominal tip speed ratio	4.4	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	205 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	6 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.94263 m/s	cutin_Vw
Mechanical power (Torque)	226.23 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	3 mm	hr
Magnet width-to-pole pitch ratio	0.579515	ai
Inner-to-outer magnet radius	0.595423	kd
Flux density in airgap	0.692568 T	Bmax
Flux density on magnet surface	0.780848 T	Bmg
First harmonic of flux density in airgap	0.63155 T	Bp
Flux per pole (Calculated)	0.000191072 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	0.4118 mm	dist_magnet_Rin
Magnet mass	540 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	3000 mm3	Vmag
Volume of all magnets	72000 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	100 mm	Dout
Average radius	39.4343 mm	Ravg
Inner radius	29.4343 mm	Rin
Outer radius	50 mm	Rout
Effective outer radius	49.4343 mm	Rout_eff
Mass of rotor disks	0.370865 kgr	BackIronMass
Volume of rotor disks	47.1239 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	2.63593 T	SaturMAX
Is the magnet rotor disk saturated?	Yes	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	6 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	45	Nc
Copper wire diameter	0.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.392699 mm2	sc
Copper wire diameter (Calculated)	0.707107 mm	dc_theor
Coil leg width	5 mm	wc
Average length of coil turn	85.7 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	77.13 cm²	stator_surface_area
Heat coefficient	7.65337	cq_real
Current density	45.8366 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.189017 Ohm	Rc
Phase resistance	0.56705 Ohm	Rphase
Phase inductance	0.000192488 H	Ls
Nagaoka constant	0.25885	Kn
Volume of a single coil	2571 mm3	coil_volume
Weight of a single coil	14.1409 g	coil_weight_constr
Coil hole at Rin	15 mm	coil_hole_Rin_constr
Coil hole at Rout	15 mm	coil_hole_Rout_constr
Coil mass for construction	0.141409 kgr	mcu_constr
RMS flux linkage of phase A	0.00651541 Wb	FluxRmsA
RMS flux linkage of phase B	0.00630035 Wb	FluxRmsB
RMS flux linkage of phase C	0.0064695 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	2.566 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	4.30111 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	4.15093 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	4.16973 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	4.15218 V	V_rmsC
Current at the nominal wind speed	18 A	Iac_nom
Nominal frequency	35.0318 Hz	fnom
Generator power (Torque)	-330.56 W	PelN_Torque_x
Electromagnetic power (Torque)	220.679 W	PHMN_Torque_x
Copper losses (Torque)	551.173 W	PcopperN_Torque_x
Eddy current losses (Torque)	0.0665332 W	PeddyN_Torque_x
Generator efficiency (Torque)	-1.46117	efftotalN_Torque_x
AC Power at the rectifier (Torque)	-297.504 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	-267.753 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)	5.55093 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	90.9192 EUR	Totalcost
Total generator mass	1.14686 kgr	TotalMass
Total generator volume	0.282743 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	61.7438 EUR	Magcost
Magnet shipping cost	4.34783 EUR	shippingcost
Copper mass	0.121852 kgr	mcu
Cost of copper	1.79854 EUR	coppercost
Resin mass	0.114146 kgr	resinmass
Cost of resin	1.57669 EUR	resincost
Resin volume	83.9309 cm3	ResinVolume
Total mass of one generator rotor	0.455433 kgr	TotalMassRotor
Cost of iron	0.456164 EUR	ironcost
Surface area of moulds	0.16 m2	woodS
Total cost of moulds	25.344 EUR	woodcost

Revolutions per minute (RPM)
0
17.515924
35.031847
52.547771
70.063694
87.579618
105.095541
122.611465
140.127389
157.643312
175.159236
192.675159
210.191083
227.707006
245.22293
262.738854
280.254777
297.770701
315.286624
332.802548
350.318471

I_RMS (A)
0
3.6
7.2
10.8
14.4
18

Output files

Octave/Matlab variable file:

simulation-7089.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

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:

100.00mm

Magnetic material:

NdFeB N42

Number of generator poles:

Magnet length:

20mm

Magnet width:

15mm

Magnet thickness:

10mm

Rotor disk thickness:

3mm

Mechanical clearance:

2.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

0.55

Current at nominal wind speed:

18.00A

Stator thickness:

6mm

Number of turns per coil:

Copper wire diameter:

0.50mm

Number of wires at hand:

Coil leg width:

5mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

6.00V

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:

Outer radius

Simulation step:

Current step:

RPM Step:

Mesh size:

Fine mesh

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³