Watermaker on fast Multihulls

[44'cruisingcat]

Originally Posted by nwdiver

It seem the volume talked about is for a small dc driven water maker, I would bucket the water from over the side as required, KISS, why add an extra pump......

A have a friend with a 55 ft custom cutter, has one below water through hull the poop out, all others at or above the water line, to make water (only on anchor), he buckets 20 gal SW into a tank on deck runs the 110 volt 40gal/hr system off the gen set fill as needed then puts it away......it seem very simple to me....

A 40 gal/hr system will require about 400 gal/hr of seawater to run. 200 buckets an hour, would keep you busy.....

[Jim Cate]

Originally Posted by nwdiver

It seem the volume talked about is for a small dc driven water maker, I would bucket the water from over the side as required, KISS, why add an extra pump......

A have a friend with a 55 ft custom cutter, has one below water through hull the poop out, all others at or above the water line, to make water (only on anchor), he buckets 20 gal SW into a tank on deck runs the 110 volt 40gal/hr system off the gen set fill as needed then puts it away......it seem very simple to me....

Umm... RO watermakers need to pump something like ten times the raw water volume for a given fresh water output, don't they? Would take a lot of bucketing to keep up with a 40 gal/hr output.

Jim

[a64pilot]

Unless mistaken I believe my 30gl an hour Watermaker is driven by a 1.6 gl per min pump, and it “makes” a half gl a minute, if so then it’s three to one, not ten to one.
Either way feeding it by buckets would seem to be as much work as jugging water with a dinghy.

[contrail]

Originally Posted by a64pilot

Unless mistaken I believe my 30gl an hour Watermaker is driven by a 1.6 gl per min pump, and it “makes” a half gl a minute, if so then it’s three to one, not ten to one.
Either way feeding it by buckets would seem to be as much work as jugging water with a dinghy.

Depends on the Recovery Rate. 9-11% is very common for seawater.