Marine Propulsion: Diesel, Electric, Diesel-Electric or Hybrid? (1/2)

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In this part: Classic diesel vs battery electric propulsion …
↓↓↓ Complete description, time index and links below ↓↓↓
So you’re thinking about putting something more modern than a good old diesel into your boat? Then this two-parter video series is for you! This first part covers diesel and battery electric propulsion, discussing the pros and cons of both.
There’s also some groundwork laid for the final part two (link below), where we have a look at diesel electric and hybrid. This second part will also contain a summery, and hopefully we’re able to draw some conclusions by then.
00:00 Intro - the sounds of marine propulsion
00:35 Overview - what I want to talk about
02:19 Diesel propulsion - just some numbers
06:01 Electric propulsion - numbers, battery technology
11:35 Discussion - pros and cons of diesel and electric
23:23 Wrap-up - coming up in part two, bye
Tutorials • Tutorials
Marine Propulsion: Diesel, Electric, Diesel-Electric or Hybrid? (2/2) • Marine Propulsion: Die...
#electricboat #hybrid #diesel #dieselengine #electric #hybrid #boat #boats #ship #ships #robertssmorgasbord

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Опубликовано:

4 авг 2024

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Комментарии : 19

@novelistusonthewater 2 года назад

good stuff Robert. Thanks for sharing this.

@robertssmorgasbord 2 года назад

I thank you for the praise! There will be more marine related content in the future. I do plan to build a boat (6m/20ft) for the European inland waterways as "retirement project", but will definitely first start with a small flat bottom dinghy / jon boat (2.3m/7.5ft).

@nacermoussa144 Год назад

Great explanation thank you

@robertssmorgasbord Год назад

You're welcome! And thank you for the praise!

@davidr9876 2 года назад

12 minutes in and it's apparent that hybrid is going to allow you to enjoy the torque and efficiency of electric motor with the energy density of diesel. This should be the preferred method of propulsion (not considering rebuild cost etc) until battery technology advances to give energy density comparable with diesel fuel. Or until electric production from solar or wind advances significantly.

@robertssmorgasbord 2 года назад

You're absolutely right. I'm drawing a very similar conclusion in the second part. Pure electric propulsion for marine applications works (for now) only in a few niches. Nevertheless there are purely electric commercial offerings for pleasure vessels out there. Some plaster every free surface with solar cells (helps of course a bit, but not much) and none advertise with hard numbers regarding the endurance.

@zahidhasnat4006 3 месяца назад

need advise on fishing boat running on 240 HP diesel engine for converting in to electric system. what type or size of motor required for 240 HP diesel engine?

@robertssmorgasbord 3 месяца назад

Well, 240 mhp (metric horsepower) are 177 kW (1 mhp = 0.7355 kW). 240 ihp (imperial horse power) are 179 kW (1 ihp = 0.7457 kW). That's what you need at the shaft to achieve the same top speed. Note that electric motors often have the input power specified only. So to get to the shaft power you have to consider an efficiency of 90% to 95%. Also note that you might need a new prop, since an electric motor might have another RPM range than your diesel (after the gear box). Lastly you'll nee about Finally note that you'll need about 10 kg of battery (LiFePO4 type) to store 1 kWh, meaning to be able to run 1 hour at full speed (optimistically 185 kW input power), you'll need about 1.85 metric tons of batteries.

@andymouse 3 года назад

Do you have a boat or thinking about getting one ? also the thought of regen on a boat never occurred to me , you need to work on the sound effects !....cheers.

@robertssmorgasbord 3 года назад

Yes, I do indeed think about getting/building a boat at one point. But that's more a long term / retirement project. Anyway, there might be a marine-related video now and then from here on out.

@andymouse 3 года назад

@@robertssmorgasbordthats good, it is a Smorgasbord after all !

@robertssmorgasbord 3 года назад

@@andymouse Exactly! :-)

@jimj2683 2 месяца назад

You also have to factor in that you shouldn't charge the battery to more than 100% and not discharge to below 20%, so in reality you can only use 60% of the battery.

@robertssmorgasbord 2 месяца назад

Yup, you made some valid points here. Though LiPoFe3 cell chemistry definitely allows you to charge up to 100%. So 80% of usable capacity would be more realistic.

@BjornV78 3 года назад

What about a Flux-capacitor, then you can use banana peels ;-)

@robertssmorgasbord 3 года назад

Well, unfortunately I have no access to a Mr. Fusion Home Energy Reactor. But I hear the Russians are strapped for cash and have a lot of used submarine reactors lying around :-)

@ildarkhamitov Год назад

How clumsily the author manipulates numbers. I chose a stationary diesel and an outboard electric motor. The required power was picked up by the most problematic for electric. Electric drive will always be more efficient than diesel. The thing is that a diesel engine has a significant percentage of energy going into the void to heat the environment. And therefore the efficiency of a diesel engine of 99% is nonsense. The author is trying to prove that it takes less for him to heat losses in a diesel engine than in an electric one?

@robertssmorgasbord Год назад

Dear ildarkhamitov, please watch the video again from 2:20 ( ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-z38cIBVdiV0.html ). The "99%" in the box below the box with the word "Gear" in it is the efficiency number is for the gear box. I never gave any efficiency numbers for the diesel engine in this video, because it was not necessary for the other calculations (*). I just gave the consumption in l/h and g/kWh at full load. (*) One of the main points of the video was to calculate the system weight, especially the weight needed for energy storage, for a diesel and a battery electric propulsion system of similar shaft power and endurance. And yes, of course electric motors are far more efficient (Aquamot A100e 92% in the video) than diesel engines (29% in the video if you do the math - engine 0.290kg/kWh, diesel 11.8kWh/kg). I'm sorry ildarkhamitov, but your comment just makes false statements ("99%") and disregarding these false statements it makes absolutely no sense in the context of my video.