TUB_Var_1 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by pandaDM on Fri, 13/12/2019 - 11:30

Duration:

00:23:01

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	125.398 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	343.949 RPM	n_nom
Nominal tip speed ratio	6	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	185 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	12 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	4.4259 m/s	cutin_Vw
Mechanical power (Torque)	309.118 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	20 mm	hr
Magnet width-to-pole pitch ratio	0.776985	ai
Inner-to-outer magnet radius	0.661938	kd
Flux density in airgap	0.226749 T	Bmax
Flux density on magnet surface	0.226703 T	Bmg
First harmonic of flux density in airgap	0.235213 T	Bp
Flux per pole (Calculated)	0.000582656 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	1.2614 mm	dist_magnet_Rin
Magnet mass	6000 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	50000 mm3	Vmag
Volume of all magnets	1200000 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	300 mm	Dout
Average radius	122.902 mm	Ravg
Inner radius	97.902 mm	Rin
Outer radius	150 mm	Rout
Effective outer radius	147.902 mm	Rout_eff
Mass of rotor disks	22.2519 kgr	BackIronMass
Volume of rotor disks	2827.43 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.353347 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	3	q
Total number of coils in stator	9	coil_num
Number of turns per coil	45	Nc
Copper wire diameter	1.6 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	4.02124 mm2	sc
Copper wire diameter (Calculated)	2.26274 mm	dc_theor
Coil leg width	21 mm	wc
Average length of coil turn	230.594 mm	lavg
Stator nominal temperature	35 C°	tc_real
Stator surface area	871.647 cm²	stator_surface_area
Heat coefficient	0.0613325	cq_real
Current density	2.57881 A	Jmax_real
Resistivity of copper at nominal temperature	1.77616E-8 Ohm.m	pt
Resistance of a single coil	0.0458336 Ohm	Rc
Phase resistance	0.137501 Ohm	Rphase
Phase inductance	0.000489066 H	Ls
Nagaoka constant	0.196819	Kn
Volume of a single coil	62952.3 mm3	coil_volume
Weight of a single coil	389.623 g	coil_weight_constr
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	50 mm	coil_hole_Rout_constr
Coil mass for construction	3.89623 kgr	mcu_constr
RMS flux linkage of phase A	0.0143691 Wb	FluxRmsA
RMS flux linkage of phase B	0.0140832 Wb	FluxRmsB
RMS flux linkage of phase C	0.0143205 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.0763 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	9.14875 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	9.21532 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	9.16274 V	V_rmsC
Current at the nominal wind speed	10.37 A	Iac_nom
Nominal frequency	34.3949 Hz	fnom
Generator power (Torque)	226.537 W	PelN_Torque_x
Electromagnetic power (Torque)	273.424 W	PHMN_Torque_x
Copper losses (Torque)	44.3593 W	PcopperN_Torque_x
Eddy current losses (Torque)	2.52714 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.732851	efftotalN_Torque_x
AC Power at the rectifier (Torque)	203.884 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	183.495 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 (Torque)	35.6942 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	243.229 EUR	Totalcost
Total generator mass	32.6926 kgr	TotalMass
Total generator volume	6.9979 dm3	TotalVolume
Blade rotor mass	15.2925 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	94.3158 EUR	Magcost
Magnet shipping cost	72.4638 EUR	shippingcost
Copper mass	3.35739 kgr	mcu
Cost of copper	49.555 EUR	coppercost
Resin mass	1.08335 kgr	resinmass
Cost of resin	14.9641 EUR	resincost
Resin volume	796.577 cm3	ResinVolume
Total mass of one generator rotor	14.126 kgr	TotalMassRotor
Cost of iron	27.3698 EUR	ironcost
Surface area of moulds	0.36 m2	woodS
Total cost of moulds	57.024 EUR	woodcost

Revolutions per minute (RPM)
0
17.197452
34.394904
51.592357
68.789809
85.987261
103.184713
120.382166
137.579618
154.77707
171.974522
189.171975
206.369427
223.566879
240.764331
257.961783
275.159236
292.356688
309.55414
326.751592
343.949045

I_RMS (A)
0
2.074
4.148
6.222
8.296
10.37

Output files

Octave/Matlab variable file:

simulation-6169.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

2.00m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

12.00m/s

Cut-in TSR:

8.75

Nominal TSR:

6.00

Air density:

1.225kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

300.00mm

Magnetic material:

Ferrite C8

Number of generator poles:

Magnet length:

50mm

Magnet width:

50mm

Magnet thickness:

20mm

Rotor disk thickness:

20mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

Winding fill factor:

0.55

Current at nominal wind speed:

10.37A

Stator thickness:

13mm

Number of turns per coil:

Copper wire diameter:

1.60mm

Number of wires at hand:

Coil leg width:

21mm

Stator nominal temperature:

35.00C°

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