Comentarii la: Ce s-a întâmplat cu DC AirCon? – Episodul 163

De: @davegrocketsurgeon7071

@davegrocketsurgeon7071 — Tue, 27 Feb 2024 10:51:21 +0000

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

De: @user-om2lo9uw1y

@user-om2lo9uw1y — Mon, 26 Feb 2024 16:00:10 +0000

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

De: @nutsandbolts432

@nutsandbolts432 — Mon, 26 Feb 2024 12:57:37 +0000

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.

De: @irineuevora9154

@irineuevora9154 — Mon, 26 Feb 2024 11:07:09 +0000

Does the hooker pump suck or blow?

De: @mal4821

@mal4821 — Mon, 26 Feb 2024 07:47:46 +0000

How much Solar and lithium do you have? I have 1,600W Sunpower Solar and 2x 24 230Ah Lithium for 5,888W each = 11,77Kw but i am thinking of adding a third if not forth battery to be able to run air con over night.

De: @craigs5212

@craigs5212 — Mon, 26 Feb 2024 07:41:04 +0000

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

De: @user-ix5qy2jk7h

@user-ix5qy2jk7h — Mon, 26 Feb 2024 06:00:20 +0000

De: @WilliamAArnett

@WilliamAArnett — Mon, 26 Feb 2024 05:07:03 +0000

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.

De: @johnspadaro4755

@johnspadaro4755 — Mon, 26 Feb 2024 04:39:22 +0000

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.

De: @johnmcgee1182

@johnmcgee1182 — Mon, 26 Feb 2024 04:23:24 +0000

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!