What happened to our DC AirCon? - Episode 163

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[@papa.mike01]

I just found your channel today. Thank you for bringing all of us along on you rebuild journey. I’m a retired scientist and university professor and can honestly say you have your tech all correct. Thanks again.

[@glynnsmith4142]

Y’all are just a plethora of knowledge! The pump situation, from one inch to two inches is very impressive, in fact “that’s what she said”

[@SRMWorkshop]

I know it would cost more, but I would be tempted to run 2 pumps and if one can do the full system have it setup to cycle between the pumps with the option to select just one if you ever had a failure.

[@davegrocketsurgeon7071]

You guys are legit my top KZbinr sailing channel. Keep up the work but pump out more videos please. 🙏🏻

[@ReefRunner1]

You folks are awesome!! Thanks for the info!!!!

[@beardies]

I would split the boat and use two pumps. If you lose your current pump you loose all your AC. Splitting the boat will give you some redundancy. You might even think about setting it up so you can run the whole boat off of either pumps in case of a failure. Good luck.

[@barroosa]

You guys are great! Thanks for doing this research. Ty, you and I conversed by email about 48v accessories last year and I am so excited to hear this has worked for you! My boat plans are still a couple of years out, so you really are my Guinea Pigs. Will be watching for more updates. You've probably already thought of this, but refrigeration/freezing are also huge drains. So a great follow up series would be 48v refrig/freeze...... Thanks again and enjoy your time aboard!!!

[@GTP3600]

I believe DC compressors are ac compressors with a built in inverter. Are these little inverters that more efficient than your central inverter?

[@paratyshow]

👍✅ You guys left some really good lines on the table there re your "..... pump" and size relationships, I'm betting we will get them in the next episode🤣Love the content, so cutting edge, tks

[@Lana_Warwick]

Pretty sure those lines were cast around 5 months ago, just rebaited & some burley emails to find out AC cost

[@paratyshow]

@@Lana_Warwick 👍✅

[@arranpritchard9004]

Thank you for documenting this, I have a salvaged 56ft cat ( in Thailand ) and am considering to do the same. I may go with only ac units in the berths due to the height issue, and use two 500 gph seaflo pumps, one for each hulll, they are 100 watts each.

[@Vmarine_lt]

Can you shear some links pls on what u purchased, or what is available in DC aircon for boats? as well this massive pump is all about water debit per hour, and pretty warm ambient water temp?

[@BLKMGK4]

So Ty wants a one pump Hooker? ;) Fascinating stuff guys. I doubt I'll ever need one quite like this but it's all good information to say the least. I had wondered how that pump worked out, happy to hear it's working so well!

[@lorenclifton110]

Really enjoy the content here. Admittedly the wiring and such goes over my head but it’s a real treat pleasure to watch genius at work. Thanks you guys! 😀💕😀

[@adventurecrews]

Great information and we are excited to follow this AC journey! On our 2016 L44 we only have 2 units (16k) which split the hulls and saloon…it not enough we should have 3 total units…so I am really excited to follow this project. We have 3000W of solar and 1080Ah @ 24v and can comfortably run both units for about 8 hours during the summer nights without completely draining our batteries…but as they say, you never have enough energy on a boat and we would love to be more efficient! - Cole

[@thomasbrasse3145]

I had no idea that the 50 had a chiller system. I've been interested in this boat, but that is a negative as you so eloquently described.

[@johnspadaro4755]

Wouldn’t it be more efficient to have made a custom chiller unit powered by 48vdc? This would have avoided pumping cooling water to the 6 individual units. The chiller can be mounted in the engine room so the noise of the compressor is isolated. AC on a boat requires the most frequent maintenance on any system. The cooling water lines need to be frequently flushed with barnacle buster. Now you have to perform this task on 6 units instead of one. An even more energy efficient strategy is to install a 2nd lower capacity chiller for use at night when the AC btu load is less.

[@peggykm4977]

Well, it was interesting to hear your trials and tribulations may pan out to a successful setup others can use- think I (almost) understood most of the content! Rock on!

[@artmraz]

great team please keep sharing to the boating community :))

[@gab72x3]

I really wish I owned a boat somewhere in the tropics, and was in need of air conditioning. Alas, I live in Montana where 6 months, if not maybe 8 months out of the year you don't need air conditioning.😜 Nonetheless, I enjoy following along and love the episodes. 😎

[@JH-ij6jw]

This is awesome. I don't own a sailboat but I am loving the detail on AC vs DC content. Keep it up.

[@nutsandbolts432]

I’ve always wondered, why not plumb the system to use ethylene glycol and use a heat exchanger below the water line? Prevents pumping sea water all over your boat, thus preventing corrosion associated with sea water. Use a titanium heat exchanger of sufficient size and corrosion would be minimal. I know it adds complexity and cost, but knowing that my system isn’t rotting from the inside out, and being supplied with a 10,000 gal p/hr pump would give me piece of mind.

[@MrJhchrist]

This is commonly done for refrigeration via "keel coolers" which are sintered bronze heat exchangers. But they just aren't efficient enough for AC, you'd need a 1000 pound hunk of bronze running the full length of the boat to transfer the btus. Traditional heat exchangers like I think you are imagining are just too clunky and fragile to have dragging through the water.

[@nutsandbolts432]

@@MrJhchrist Thanks for the input, but I’m not talking about keel coolers. Fluid to fluid titanium heat exchangers can be found in a wide array of sizes to suite your needs. Will require a seacock, strainer, pump, and outlet to reside in the bilge and move seawater past the coolant tubes inside of it. And titanium isn’t nearly as efficient as silver, copper, or aluminum, but you make up for that in increased capacity. They can also be custom made to fit a particular shape, along with inlets and outlets for both the coolant and seawater side.

[@MrJhchrist]

@@nutsandbolts432 My bad, I mis read "below the waterline" as "in the water". I see your point now. Seems like since heat transfer is driven by temperature difference that the closer you want the glycol to sea temp the larger the exchanger / water flow needs to be. Basically you trade some sort of efficiency to achieve it, but their pump sounds pretty efficient anyway. Interesting idea.

[@SeanHenderson-gn8if]

It would definitely be better running a closed loop heat exchanger system so the ac units would not have seawater going through them and they wouldn't have any type of build up or growth in them. They do make very efficient liquid to liquid heat exchangers.

[@jackjordan7691]

I am so happy to see you, it seams life it has been a while.

[@craigscoullar564]

There's so much quality you guys do things properly excellent mariners

[@hansclemmensen1557]

Allways a pleasure to watch you projeckts. Exiting and ambitious stuff you have going on.

[@marc4322]

Great contain! Now I know why we always have water circulation pump at 120 volts ac on catamaran!

[@docdurdin]

I was born and raised in Ft. Lauderdale, or as we affectionately call it, Ft. Liquordale. Believe me, there are a lot of Hookers there and I am so glad you found the right one for you.

[@peggykm4977]

Oh that is funnieeee

[@MrJerobona]

Sounds like a great project!

[@craigscoullar564]

Great site love these guys..

[@t9brown]

Here’s to hoping you guys, keep rockn!

[@geniksonthego8963]

I can't wait to see how this plays out.

[@bill2292]

Hi guys! I love this content!!! The weather is much nicer here in the Exumas!!! Please tell me more about the "limited space" on a 50. My friends on a 40' monohull would choke on their mai tai if I ever said that (Then they'd want to choke me).

[@Lana_Warwick]

I just watched the last vaga vid, Elayna referred to a 35ft mono as "Tiny"

[@allanburt5059]

As always very informative

[@divekatdreaming]

So excited for this series! Can't wait to see that Hooker perform!

[@nickelsen88]

What temperature do you set on the AC? Kind of important info when calculating the daily kwh usage.

[@maverickmyrtlebeach]

Cool Episod no really cool... where are you getting the water from... ?

[@clivestainlesssteelwomble7665]

How much insulation do you have in your boat especially the roofs/decks.. Insulate first it works both ways and saves energy it also keeps the boat quiet. Cork is better than foam and safer .. Theres a several European companies that produce Seadeck thats comfortable under foot and none toxic ..its also light and fire mould and bacterial resistant. The other tech thats relevant is bi thermal seasonal paint.. in high temps it reflects heat and in winter it actively absorbs solar energy ... the product i encountered is called Chameleon paint. Could be a game changer on an older boat with limited cabin hight and insulation.

[@craigs5212]

Not a sailor but seems the AC cooling water has a challenge similar to cooling the engine with a heat exchanger. Need to suck up water then pump it through restricted hosing and heat exchanges. Seems to me the pressure is more important than volume to get through all the restrictions as long as the volume is adequate for the cooling. Self priming will be necessary if the pump is above the water line and because of the salt water it needs to be easily serviceable. A gear or rubber vain pump connected to a 48V dc motor would fit the bill. Possibly something like a soda carbinator pump or non integrated engine cooling pump. Coupler or belt drive by a brush-less DC motor (E-bike motor ??) Motor RPM based on the exit water temp would be ideal. Fro best AC efficiency you want the high side of the compressor to cool as close to water temp as possible with out wasting too much DC power in the water pump. One problem you will need to solve with running 3 AC units on one pump is balancing the flow. You don't want to use restriction valves and excess pressure because that waists energy. If running only one AC the pump will be way over sized for the task. The ideal solution would be to run a fresh water closed loop system, with a small pump for each loop and some sort of common fresh/sea water exchanger that is cleanable. Of course that is why they used a central chiller, expensive but easy to engineer and install. Just the ramblings of a retired engineer. Good Luck Craig

[@SeanHenderson-gn8if]

A brushless dc pump is ideal and it wouldn't be hard to make a pump controller that is able to ramp the pump up or down depending on how many units being operated at the time. Having a manifold with solenoid valves to shut of flow to units that aren't running would also be beneficial.

[@SV_SheDevil]

Please explain if they're self-contained units. How does the water from the pump get used by the self contained units.

[@MrJhchrist]

They mean self contained as in each unit has a compressor, evaporator and fan. They still need water to transfer the heat out of the boat and dump it in the ocean. In contrast to the prior central unit where there was only one compressor and evaporator that chilled coolant to be sent to radiators throughout the boat.

[@SeanHenderson-gn8if]

If I had to bet what company is manufacturing those air-conditioning units my bet would be on Shanghai Hopewell Industrial since that is who is manufacturing the units for Mabru. I have a relationship with a manufacturer of electric water pumps in China and they have an excellent reverse engineering department. I willing to bet those $1700 pumps would cost under $200 each from the manufacturer in China.

[@peggykm4977]

Wow, where do we sign up?!!

[@mikeferguson2828]

I have been running a hopewell 12000btu 24v aircon under our bed in our cat for over a year now. We use it every night. I love the unit. Pretty cheap to buy direct from them as we are cruising SE Asia at the moment. Yup even their 24v pumps are $95. Many of our friends here are so happy with ours they bought some for their boats as well.

[@ChrisHarding-lk3jj]

When I was having product's manufactured in China I made sure I shipped everything by air so that my competitors couldn't figure out who I was having manufacture the products. Air freight manifests aren't available to the public like sea freight.

[@SeanHenderson-gn8if]

@@ChrisHarding-lk3jj Since the price for transporting by container has increased so much it has made air freight much more competitive. I remember when it was under $1500 for a container and now it's as high as $10,000.

[@sailingnoboundaries]

Once you get through all this a parts list would be amazing. We aren’t ready to make the investment now but who knows what will happen in the future. Cheers

[@Stepdaddy8969]

👍🏽

[@RoseTabone]

👍👍👍🧡🧡

[@BillB23]

Sadistics? An apt coinage at that level of power consumption. I will now add it to the list of lies, damn lies, and statistics. Your slip of the tongue has added to my vocabulary. tyvm

[@jeikeldimitrov1611]

Who let the nuts out today?

[@Lana_Warwick]

@7:35 uh huh. @12:00 "Got a youtube channel, willing to pay" but did you? "1699" sounds like an info commercial vs normal people rounding it to 1700, or simply say 1.7k. Bouncing emails to find out a ball-park cost

[@dalgamor]

hello! I'm interested in the 48vdc AC units you are using. I've tried emailing you a few times, but perhaps my emails are going to your spam folder? I'd love to chat about purchasing some of these, if you have the time to talk. Thanks! I'm from sailing S/V Lynx (another KZbin channel).

[@johnmcgee1182]

You need an ac, your not a sailing channel your a live aboard want to be I can fix anything boat is fixed. Let’s sell it and start over!

[@WilliamAArnett]

Ty, I wish you would use proper terminology. I know that you know better so please don’t mix up kilowatts and kilowatt-hours. Otherwise, it makes it very hard to understand what you’re really saying.

[@HuffnPuff22]

Seems like in the boating industry, whenever folks say kilowatts when discussing items that consume power, its assumed kilowatt hour and when people are talking about storage, then its typically kilowatts as in total energy stored. So I get where they are coming from.

[@WilliamAArnett]

⁠@@HuffnPuff22kW is a unit of POWER; kWh is a unit of ENERGY. Any other usage is just wrong. The boating community has a similar problem with amps and watts: not everything is 12v.

[@HuffnPuff22]

@@WilliamAArnett total energy stored is power. As for amps and watts, never heard anyone get those confused... at least not with those that are full time live-a-boards. I would love to see the day they move boats to 48 volts. That would be great. I kind of wish I changed out my boat to 48 volts when I bought my new batteries. But so many systems where dependent on 12, I just did not have the time.

[@WilliamAArnett]

@@HuffnPuff22 Nope. Energy is power times time (or power is energy divided by time). Ty knows this. But "kilowatt-hours" is kind of a mouthful and sometimes people forget when talking about energy (ie the amount stored in a battery or the amount used by a fridge in a day) and just say "kilowatts". Sometimes it's clear from the context what is really meant. But it's often confusing and always just plain wrong. When talking about the fridge saying it uses 200 watts might mean it uses that much when running but probably means it uses an average 200 watts over the time in question which would mean 2400 watt-hours per day. But saying it uses 2400 watts per day is meaningless.

[@HuffnPuff22]

you are right... total energy stored is not called power... a momentary blank on my side. . But my argument still stands. When boaters say use the word kilowatts on something that consumes power, they are referring to kwh, and when they are talking about stored devices, they are referring to stored energy. Everyone understands what we are talking about. Since its understood, there really isn't a need to say kwh. It's assumed. If this was an engineering firm, your argument would make perfect sense. But we are a community of boaters that are having conversations, thus not that big of a deal. Anyway, I enjoyed the banter. Hats off to you and have a good day. @@WilliamAArnett

[@glennedwards1449]

It is a shame you are a sailing channel although obviously you will have a large customer base. However a much larger customer base is those who live off grid and your channel is unlikely to penetrate that market segment.