Random Engineering, Physics, ..., Concepts and Ideas

[Windy_Skies]

@PierreB

See also:

How much bigger will wind turbines get? — Pardalote

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Videos and playlists on wind energy from Offshore Renewable Energy Catapult. ORE Catapult is the UK’s leading technology innovation and research centre for offshore renewable energy, for example:

Wind Turbine Blades Week 2022 Webinars

The wind turbine blade is the point where a mass of engineering, policy and environmental ambitions meet, and this ambition is growing. How can we tackle the need for bigger, better performing, more resilient and more sustainable blades as we progress towards Net Zero?

To answer this question, the Offshore Renewable Energy (ORE) Catapult held a week of webinars showcasing the most innovative thinking in blade design, operations and manufacture.

Take a look to find out what is in store for the next generation of turbine blades!

Wind Wakes: Briefing Webinar

Offshore Wind Economics for Complete Beginners

[Windy_Skies]

https://www.reddit.com/r/AskEngineers/comments/1c0mpsp/ideal_sensor_to_track_speed_of_a_moving_vehicle/

Using cameras to see an object, reducing resolution and capture region for higher frame rates, and some other stuff: Real-life AIM-ASSIST: Aimbot V3

[Windy_Skies]

A Better Way to Waterproof Fabric - NightHawkInLight. Wax soaked in mineral oil applied to the fabric. Towards the end an explanation of button technology; using a marble, rope, and a taut-line hitch to make the marble into a button, or attaching the rope to the fabric, without having to puncture the fabric, so keeping its strength and water resistance.

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Sodium Battery Tests

Testing Sodium cells and batteries, charge discharge curves, best charging methods, compatible hardware and equipment, safety.
Sharing all test results on YouTube and on my website here: Battery Data – the Off-Grid-Garage

From the comments under the first video:

Now leave it going, charging and discharging for a 1000 cycles.

YOu can not simulate normal use in PV, because you can not simulate temps inside cells, charging temps, dischargong temps, charging algos, not all inverters and MPPT use CC-CV. which is one of the worst charging algos. They are better charging algos, that save your battery and you can use it not 15, but 35 years. The is a lot of pdfs, how to build DC-DC BUCK, BOOST, FLYBACK charger, AC-DC charger and how to build BMS with 15 - 35 AMPS balancing curret, so you can use 35 AMPS MPPT or DC-DC charger, without communication with your inverter or BMS and BMS is still able to balance quickly to this 35 A limit.

use RE-EMF CHARGER

@PavolFilek I’m currently designing a BMS for a sodium ion pack for my electric motorcycle, is there any charging algorithms you would recommend looking into? (You mention CC-CV is one of the worst but what’s the best?) Would you say it would be necessary to write my own algo specific to the cell?

@kadensmith5586 I do not curently make SW for BMS, because no sutable parts and oscilloscope, but there is pdf , where is comparison algos like : Six PPC, Standard PPC, PWM, PAM, CC-PC and PC-CV. My work on BMS with 35 AMPS active non isolated and 15 AMPS active isolated balancer is stopped.