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#1
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A Look At Officer Training In The US Navy and Merchant Marine
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#3
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A Look At Officer Training In The US Navy and Merchant Marine
On 8/25/2017 10:38 AM, wrote:
On Fri, 25 Aug 2017 08:43:04 -0400, "Mr. Luddite" wrote: On 8/25/2017 8:00 AM, wrote: On Fri, 25 Aug 2017 07:25:12 -0400, "Mr. Luddite" wrote: The evaporators could never keep up with the demand for fresh water so we were always on water hour rationing while underway. Taking a real shower became a once in a great while deal. === I'm surprised they didn't have reverse osmosis systems, wonder if that has changed? Don't know what they use now. Both of my sons spent time on larger, more modern ships and according to them they never had lack of water or rationing. My only experience with reverse osmosis was with two smaller systems we had at one of the houses in Florida. One was in the kitchen that produced drinking water. Water was blah. The other was a somewhat larger system near the hanger. It had a 5 gallon storage tank that I used as a final rinse when washing the cars. The problem with both of them was that it took forever to replenish the water when the tanks were empty. Very slow process. === You had fresh water systems with no pressure pump. Salt water systems require much higher pressure and can be engineered to provide just about any flow rate. My wife and I get by just fine with about 20 gallons a day on average. How many crew on a destroyer? 170 to 190 depending on mission. |
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#4
posted to rec.boats
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A Look At Officer Training In The US Navy and Merchant Marine
On Fri, 25 Aug 2017 08:43:04 -0400, "Mr. Luddite"
wrote: On 8/25/2017 8:00 AM, wrote: On Fri, 25 Aug 2017 07:25:12 -0400, "Mr. Luddite" wrote: The evaporators could never keep up with the demand for fresh water so we were always on water hour rationing while underway. Taking a real shower became a once in a great while deal. === I'm surprised they didn't have reverse osmosis systems, wonder if that has changed? Don't know what they use now. Both of my sons spent time on larger, more modern ships and according to them they never had lack of water or rationing. My only experience with reverse osmosis was with two smaller systems we had at one of the houses in Florida. One was in the kitchen that produced drinking water. Water was blah. The other was a somewhat larger system near the hanger. It had a 5 gallon storage tank that I used as a final rinse when washing the cars. The problem with both of them was that it took forever to replenish the water when the tanks were empty. Very slow process. It all has to do with the amount of membrane you have and the pressure you run at. Sanibel and parts of the Cape are on RO systems now but they are using brackish water from wells, not salt water. I have a small RO here, just for drinking water and ice makers. It makes about 8 gallons a day with new membranes and filters. As they age, that falls off. I get about 2 years out of a membrane and filters go about 6 months. I did put in a bigger cartridge filter with cheaper elements in front of the proprietary filters the RO uses. I have gauges throughout the system so I can monitor the operation. You can put a booster pump in front of the RO and increase your output. |
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