4 ms·

Are there any technical details available for this system? The linked article doesn't do a good job of explaining how it works or how much impact it will have.

Are there any technical details available for this system? The linked article doesn't do a good job of explaining how it works or how much impact it will have. Assuming the boat can harness 10% of the wave's energy, wave power in the Philippines is more like 10kW per meter of wave length captured on average so that equates to ~1kW per metre of wave. Let's assume this boat can capture roughly 10m of wave then that is an average power generation of ~10kW or ~ 10hp. A boat of this size will probably have 500+ hp engines so a boost of 10hp won't have a huge amount of impact.

bildung 6y ago
Found another article with more numbers: "The ship’s “independent multi-engine technology at minimum 3000hp drive shaft sea class” is combined with a wave energy device that’s capable of generating up to 300kw/h of energy, Salvador explains." https://news.mongabay.com/2020/04/a-wave-powered-ferry-aims-to-forge-a-new-path-for-shipping-in-the-philippines/ https://news.mongabay.com/2020/04/a-wave-powered-ferry-aims-...
- lippel82 6y ago
  300kw/h is a nonsensical unit in this case. kw*h would be energy, but kw alone would be the proper unit to compare to the 3000hp drive shaft.
  - handol 6y ago
    300 kilowatt-hours per hour
Zeebrommer 6y ago
This is exactly the kind of order-of-magnitude estimation that I was looking for in the article. Where did you get the wave energy numbers?
- mambru 6y ago
  Probably this[1] is the same boat? [1]: https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_ship) https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_sh...
- barbegal 6y ago
  I got them from this map https://commons.m.wikimedia.org/wiki/File:World_wave_energy_resource_map.png https://commons.m.wikimedia.org/wiki/File:World_wave_energy_...
- efavdb 6y ago
  Here's a quick estimate: The potential energy of the wave will go like mass x gravitational acceleration x height. If the depth (front to back) of the wave is about 1 meter and the height is also about 1 M, then per meter of wave we get M g h g = 10 m / s^2; M = 1 g / cm^3 = 10^6 g / m^3 = 10^3 kg / m^3; H = 1 m MGH ~ 10^4 Joules per meter If a wave comes every 10 seconds —> 10^3 joules / sec, not far from what this person quoted. We need to add to this the kinetic energy, which might double it. Playing with the other parameters we can get close to what the parent quoted.
  - donaltroddyn 6y ago
    Just a note: at sea, when the ratio of wave height to wave length exceeds 0.17, the wave will break, so a 1m by 1m is impossibly steep.
sradman 6y ago
From the Wikipedia article Hybrid Trimaran (Philippine ship) [1]: > Waves gathered from the vessel's outriggers will drive the double action hydraulic pumps which will generate power for the ship. It sounds like the "outriggers" are the two outer hulls of the trimaran. [1] https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_ship) https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_sh...
addHocker 6y ago
A boat could tow a wave powerplant..

bildung 6y ago

Found another article with more numbers: "The ship’s “independent multi-engine technology at minimum 3000hp drive shaft sea class” is combined with a wave energy device that’s capable of generating up to 300kw/h of energy, Salvador explains." https://news.mongabay.com/2020/04/a-wave-powered-ferry-aims-to-forge-a-new-path-for-shipping-in-the-philippines/ https://news.mongabay.com/2020/04/a-wave-powered-ferry-aims-...

lippel82 6y ago
300kw/h is a nonsensical unit in this case. kw*h would be energy, but kw alone would be the proper unit to compare to the 3000hp drive shaft.
- handol 6y ago
  300 kilowatt-hours per hour

Zeebrommer 6y ago

This is exactly the kind of order-of-magnitude estimation that I was looking for in the article. Where did you get the wave energy numbers?

mambru 6y ago
Probably this[1] is the same boat? [1]: https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_ship) https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_sh...
barbegal 6y ago
I got them from this map https://commons.m.wikimedia.org/wiki/File:World_wave_energy_resource_map.png https://commons.m.wikimedia.org/wiki/File:World_wave_energy_...
efavdb 6y ago
Here's a quick estimate: The potential energy of the wave will go like mass x gravitational acceleration x height. If the depth (front to back) of the wave is about 1 meter and the height is also about 1 M, then per meter of wave we get M g h g = 10 m / s^2; M = 1 g / cm^3 = 10^6 g / m^3 = 10^3 kg / m^3; H = 1 m MGH ~ 10^4 Joules per meter If a wave comes every 10 seconds —> 10^3 joules / sec, not far from what this person quoted. We need to add to this the kinetic energy, which might double it. Playing with the other parameters we can get close to what the parent quoted.
- donaltroddyn 6y ago
  Just a note: at sea, when the ratio of wave height to wave length exceeds 0.17, the wave will break, so a 1m by 1m is impossibly steep.

sradman 6y ago

From the Wikipedia article Hybrid Trimaran (Philippine ship) [1]: > Waves gathered from the vessel's outriggers will drive the double action hydraulic pumps which will generate power for the ship. It sounds like the "outriggers" are the two outer hulls of the trimaran. [1] https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_ship) https://en.wikipedia.org/wiki/Hybrid_Trimaran_(Philippine_sh...

addHocker 6y ago

A boat could tow a wave powerplant..