Power Catamaran Concept eCat hybrid by Juri Karinen
Uploader Comments (jurikarinen)
All Comments (99)
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BOLLOCKS!
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The solution to your question is the unit kWh itself. In one hour it produces 416Wh and in two it produces 832Wh ans so on. I am sticking to the values of my example for simplicity. And run 24h it will produce 10kWh, so it produces 10kWh/d. It's just another way of writing it. Of course you can devide h/d = 1/24 and multiply with that. That is exactly what I did!
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10kWh/d is a measure for the output made by any generator (in this case solar) in one day. It is meaningslesss how long it is being run. Solar cells collect about 5 hours of their maximum every sunny day. I said that would be 25 kWh/d for a 5kWp array (20kWh with 80% sunny days). If a diesel generator produces 10kWh/d he obviously runs 24h(=1d) with 10/24 kW = 416 W. For the generator 416 would be his rated output. For the solar cells it would be an average output value over years of their life
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@heinrich97 "I knew you wouldn't get the difference"
Good for you.
"Ok again: It is 10kW (power) FOR an hour -> multiplication, so kW*h or kWh (short)."
OK. If you want to say that the generator will work one hr a day. Please show me in the same connotation how can you phrase if you wanted to say if the generator worked 2 hrs a day? I don't get the difference because the connotation you are trying to use is false. Don't put the blame on me for that.
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@Fussinated And since acceleration is measured in m/s*s you cannot say that there can't be double time unit in denominator neither. That is no general rule. But it probably is a good habit to convert the time units (for example all to seconds) thus trimming the length and reducing the complexity of the expression.
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@Fussinated I knew you wouldn't get the difference ^^ Ok again: It is 10kW (power) FOR an hour -> multiplication, so kW*h or kWh (short). That means you have to work for an hour and that describes an amount of energy used. It is not per hour like kW/h -> division. That makes no sense. 6 horses per hour is meaningless unless you mean that you can eat 6 hourses per hour. That has nothing to do with the division by days. The division by days was correct.
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@heinrich97 "READ FIRST"
ditto
"416 Watts (10kWh/24h)"
Man, what does this supposed to mean? Seriously, did you ever learn Physics at all. Youare giving two different times for the same quantity. 6 horses per hour per day. what does this mean to you? 6 horses per day is meaningful, 6 horses per hr is also meaningful. 6 horses per hr per day ... No this is not a physical expression.
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Ok, now I am answering myself. You drove me nuts ^^ THIS Video is about using hydrogen as a storage system. If YOU would use batteries. Fine, do that, I absolutely agree as I said. But they are heavy. If you look at a Stealth 540 you will see: it IS light, is HAS 1600kW power, it HAS hydrofoils, goes 40knots or whatever and the diesels probably run near their optimum efficiency. And this concept here will be far heavier and use more fuel. There is no fuel saving without going slow.
This catamaran design can now be made a dream-come-true via the naval engineering company Icarus Marine. I would be pleased to give more information on request. jk.
jurikarinen 2 weeks ago