5 ms·
Traditional composites are difficult to recycle because of several reasons: - the thermoset polymer matrix cannot be melted or separated from the fiber in any
by gp 5y ago
Traditional composites are difficult to recycle because of several reasons:
- the thermoset polymer matrix cannot be melted or separated from the fiber in any reasonable way
- the thermoset resin cannot be reformed or reshaped into a useful shape or material
- graphite fiber composites in particular are very, very hard on cutting tools and are difficult to chop up (not sure about glass fiber composites, but on bulk they have similar strength characteristics to some aluminums)
These properties are difficult to separate from composites because we want composite parts to survive the elements, often high temperatures, and be robust and reliable with little fatigue
- westurner 5y agoWhat about waterjet? Or e.g. SYLOS laser for transmutation? Or replicating nanomachines? Or a vat of something like the stuff that eats plastic and everything else in the ocean if it gets out?
- Arnt 5y agoHow much effort do you want to spend on what's a comparatively small problem? There are a little over 200 buildings for every wind turbine blade in the country where I live, and I venture to guess that the average building contains more troublesome materials than the mass of a wind turbine blade.
- mburee 5y agoProbably just orders of magnitude cheaper to just bury it somewhere
- westurner 5y agohttps://www.quora.com/How-many-wind-turbines-could-fit-in-1-acre https://www.quora.com/How-many-wind-turbines-could-fit-in-1-... : > The density of wind turbines per unit of land area depends on many factors. Wind farms containing very large (1.5–2 megaWatt) turbines may have only one for every 25–50 acres. Smaller turbines can be more closely spaced. > At either rate, the overall harvestable wind energy per unit of land at fully rated conditions (approx. 12 meters/sec wind speed), is generally in the range of 50 to 100 kW per acre. harvestable_wind_energy = 50-100 kW/acre https://www.energy.gov/eere/articles/wind-turbines-bigger-better https://www.energy.gov/eere/articles/wind-turbines-bigger-be... : average_rotor_diameter: 120m (393ft) blade_length = 1/2 * average_rotor_diameter = 60m (197m) How many rotor blades can be stored on an acre? Acre = 43560 ft**2 blade_depth__on_end = spacing_vertical = spacing_horizontal = How much less $ does an acre storing the maximum number of wind turbines yield compared to a wind turbine on, say, 50 acres? Sphere packing https://en.wikipedia.org/wiki/Sphere_packing https://en.wikipedia.org/wiki/Sphere_packing Wind_turbine_design#Blade_recycling https://en.wikipedia.org/wiki/Wind_turbine_design#Blade_recycling https://en.wikipedia.org/wiki/Wind_turbine_design#Blade_recy...
- westurner 5y agoIn Python, [JupyterLite or Mamba] Pint and Uncertainties might be helpful for units and uncertainty/error propagation. The https://numpy.org/ https://numpy.org/ pyolite (WASM) IPython demo has SymPy installed in the env but not Pint? [1] https://github.com/hgrecco/pint https://github.com/hgrecco/pint [2] https://github.com/lebigot/uncertainties https://github.com/lebigot/uncertainties