71–80 of 99 posts
Earlier quoted context omitted.
Also why not add sustinance cost for the human looking at the device then? Food, water, heating/cooling, clothes, glasses, etc... Proportionally for 2 minutes of course.
Those costs would be the same if the article was read from a newspaper or magazine, so they can be factored out.
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…
> 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_sh...
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…
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…
> The emissions from travel it took to report this story were 0kg CO2. The digital emissions from this story are an estimated 1.2g to 3.6g CO2 per page view. Maybe this is what finally could push companies towards making lighter and more efficient websites? At least an estimate of a webpages watt usage (server and client side).
I am not against lighter websites. But it's not gonna happen unless we start pricing carbon.
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…
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?
Earlier quoted context omitted.
Here is the methodology https://www.bbc.com/future/article/20200131-why-and-how-does... I think most of it comes from your client device. Your laptop may be using 50W of power or about 20g of CO2 per hour so reading the article for 6 minutes is ~2g of CO2.
That makes quite a lot of sense, but it also makes me frown a bit at the phrasing, which I feel is quite misleading. "The digital emissions from this story are an estimated 1.2g to 3.6g CO2 per page view." Re-reading it, technically they are right, if "view" is taken in a non-technical fashion. But everyone reading that text would assume if they click refresh, the emissions are doubled. Also, I do wonder if they take…
According to https://news.ycombinator.com/item?id=24068986, that's 1g every 90s, so 4g CO2 for 6 minutes reading time.
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…
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-...
Earlier quoted context omitted.
I can't imagine there would be that many. Sails just don't provide all that much motive force, and they're far too unreliable (wind dies down, it doesn't matter how much sail you have.) Maybe the GP was thinking more along the lines of general 'green' tech -- wind turbines, solar panels, etc? It would certainly be cool to see more of those to supplement existing propulsion systems on ships, and that would help reduce…
Combining technologies would absolutely be a great way to pivot, as the article shows. Maybe it’s a dumb question, but why don’t we have sails on modern ships as a supplement? I just lament that we basically completely abandoned such a great mechanism (sails) so haphazardly just because coal was cheap & reliable; now the environment pays the price.
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…
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?
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.