cre8.appliance.v1 · fan
Box fan, 480 mm
The fan passes its checks
Box fan takes 56 steps from 9 raw materials: 5 run here, 18 by partners, 33 are bought. The plan makes that 8 here, 15 by partners, 33 bought. 9 inputs are still opaque.
- Mass
- 4.42 kg
- Parts
- 21
- Airflow, top speed
- 1749 cfm at 1050 rpm
- Input, top speed
- 82.8 W
- Noise at 1 m
- 56.9 dB(A)
- Efficacy
- 21.1 cfm/W
Recipe
As recipe text
cre8.appliance.v1 kind=fan base_diameter_mm=150 base_mass_kg=0 blade_diameter_mm=480 blade_thickness_mm=2.5 blades=3 chord_mm=140 cord_m=1.8 cord_mm2=0.824 guard=plastic_grille guard_clearance_mm=15 guard_pitch_mm=12 guard_wire_mm=4 height_mm=300 hub_diameter_mm=100 insulation=b low_rpm=800 mains_hz=60 mains_v=120 motor=shaded_pole motor_w=100 oscillate=false pitch_deg=11 poles=6 speeds=3 style=box top_rpm=1050
Checks
| Check | Reads | Holds to | |
|---|---|---|---|
| Efficacy | 21.1 cfm/W at its worst speed | at least 10 cfm/W at every speed (assumed floor) | holds |
| Stall | 0% of the blade span past stall at the top speed | at most 25% | holds |
| Motor speed | 1050 rpm at the top speed of 1200 rpm synchronous | at most 1056 rpm | holds |
| Overload | 82.8 W drawn at the top speed | the motor's 100 W rating | holds |
| Winding heat | 69.6 K rise at 1050 rpm, 53.8 W lost | at most 95 K for its insulation class | holds |
| Cord | 0.824 mm² carrying 1.39 A | at least 0.5 mm² | holds |
| Guard | 8 mm openings, the finger stops short: reaches 0 mm past the guard | less than the 11 mm to the blades (ISO 13857 would ask 20 mm, for comparison only) | holds |
| Tipping | tips at 12.5°; blowing 1.36 N·m against 2.82 N·m to stand | stands on a 10° incline and while running | holds |
| Noise | 56.9 dB(A) at 1 m; blade pass 52.5 Hz | at most 60 dB(A) (assumed) | holds |
At each speed
| rpm | cfm | Air, m/s | Thrust, N | Input, W | Current, A | cfm/W |
|---|---|---|---|---|---|---|
| 800 | 1332 | 2.61 | 2.63 | 48 | 0.667 | 27.7 |
| 925 | 1541 | 3.02 | 3.52 | 64.2 | 0.892 | 24 |
| 1050 | 1749 | 3.43 | 4.53 | 82.8 | 1.15 | 21.1 |
Bill of parts
| Part | Group | Count | Formed by | Each | Materials (each) |
|---|---|---|---|---|---|
| Stator | motor | 1 | laminate | 630 g | electrical steel 630 g |
| Winding | motor | 1 | wind | 210 g | magnet wire 210 g |
| Shading ring | motor | 6 | stamp | 7 g | copper strip 7 g |
| Rotor core | motor | 1 | laminate | 238 g | electrical steel 238 g |
| Rotor cage | motor | 1 | cast | 98 g | aluminium 98 g |
| Shaft | motor | 1 | turn | 84 g | steel rod 84 g |
| Bearing | motor | 2 | bought | 21 g | bearing 21 g |
| End bell | motor | 2 | stamp | 28 g | steel strip 28 g |
| Blade set | rotor | 1 | mould | 257 g | polypropylene 257 g |
| Spinner | rotor | 1 | mould | 15 g | abs 15 g |
| Rear grille | head | 1 | mould | 724 g | polypropylene 724 g |
| Motor strut | head | 4 | stamp | 76 g | steel strip 76 g |
| Front grille | final | 1 | mould | 724 g | polypropylene 724 g |
| Fasteners | final | 12 | bought | 3 g | fastener 3 g |
| Frame | stand | 1 | mould | 670 g | polypropylene 670 g |
| Foot | stand | 2 | mould | 57.2 g | polypropylene 57.2 g |
| Handle | stand | 1 | mould | 50 g | polypropylene 50 g |
| Switch housing | controls | 1 | mould | 40 g | abs 40 g |
| Switch contact | controls | 4 | stamp | 2 g | copper strip 2 g |
| Mains cord | controls | 1 | extrude | 52.3 g | pvc cord 25.7 g, copper strand 26.6 g |
| Mains plug | controls | 1 | bought | 30 g | mains plug 30 g |
4.42 kg in all, 4.34 kg carried by the stand (the cord and plug lie on the floor).
Made from
The longest chain is 8 steps; 0 of 26 made pieces have a published plan. The graph is make:box-fan.
| Material | Per fan | From |
|---|---|---|
| Copper ore | 61.1 kg | mined: porphyry copper ore, about 0.6 % Cu |
| Crude oil | 3.02 kg | drilled: crude oil |
| Iron ore | 2.94 kg | mined: hematite ore, about 62 % Fe |
| Coal | 1.13 kg | mined: bituminous coal |
| Bauxite | 520 g | mined: bauxite, about 50 % alumina |
| Limestone | 466 g | quarried: limestone |
| Quartz | 106 g | quarried: high-purity quartz lump |
| Salt | 25.5 g | mined: rock salt or solar brine |
| Natural gas | 4.08 g | drilled: natural gas, mostly methane |
| Steel scrap | 541 g | recovered: collected: sorted steel scrap |
| Caustic soda for the Bayer liquor | 16.6 g | recovered: taken from chlor-alkali cells, where it comes off beside chlorine |
Where buying starts
- Alloy and roll electrical steel
- Cast rod, draw and enamel magnet wire
- Cast and roll copper strip
- Electrolyse alumina to aluminium
- Roll steel rod
- Make the bearing
- Roll steel strip
- Polymerize propylene
- Graft and compound ABS
- Extrude the mains cord
- Make the mains plug
- Head, roll and plate fasteners
Still opaque
| Input | Per fan | What is missing |
|---|---|---|
| Prebaked carbon anode | 45.3 g | calcined petroleum coke and coal-tar pitch; not drawn yet |
| PVC plasticiser | 13.7 g | DINP or DOTP from oxo alcohols and phthalic or terephthalic acid; not drawn yet |
| Magnet wire enamel | 6.49 g | polyester-imide or polyamide-imide enamel; formulation not disclosed |
| Zinc for brass | 3.88 g | zinc metal; its mine and smelter are not drawn yet |
| Aluminium fluoride | 2.16 g | from fluorspar or fluorosilicic acid; not drawn yet |
| Bearing chromium, cage and grease | 1.26 g | the 1.5 % chromium of 52100 steel, the pressed cage and the grease; not drawn yet |
| PVC heat stabiliser | 0.914 g | calcium-zinc stabiliser package; formulation not disclosed |
| Ziegler-Natta catalyst | 0.785 g | titanium chloride on magnesium chloride; the makers do not disclose the recipe |
| Zinc plating | 0.36 g | zinc and passivate chemistry; the zinc's mine is not drawn yet |
Who makes it
Today 5 steps run here, 18 by partners and 33 are bought. The plan runs 8 here, 15 by partners and buys 33.
Machines here: assembly bench, cnc lathe, coil winder. Partner capabilities wanted: die casting, injection moulding, lamination stamping, metal stamping. Standard chains use typical published yields and loadings, rounded; none is measured on a line this network runs.