Question, fresh water bottles?

[Aktungbby]

INFO IS MINIMAL AND I HAD TO SURMISE BASED ON WHAT IS AVAILABLE. http://www.uboatarchive.net/Design/DesignStudiesTypeIXC-S38.htm

The design of the ventilation system forms an interesting comparison with U.S. Submarine practice. Although the quantity of air renewal and recirculation are approximately equivalent, the compromises in design to arrive at a satisfactory ventilating system are markedly different. Duct velocities are higher in the german design, resulting in smaller duct sizes and higher blower horsepower ratings, and produce optimum operating conditions at less the maximum capacities.

http://www.uboatarchive.net/CumulativeEdition.htm

(xi) Air purification. Air can be purified by means of potash cartridges sufficient of which are carried to keep it pure for 48 hours (500-tonners carried 150; beginning 1944 reported increase to 300 - B2). Oxygen cylinders are also varied for the purpose of conditioning the vitiated air. The standard CO2 analysis set is carried and in addition ampoules containing a solution of sodium hydroxide and phenol-phthalein are carried which, when broken, give an indication of the CO2 concentration when the time to turn red is noted against a stop watch. It is possible that Lithium hydroxide is also used for air conditioning. Supply U-Boats also carry air conditioning plants fitted into the Control Room which are known as Klima equipment and are manufactured by Linde of Cologne. It is said to produce dry air at about 15-18 degrees C. (59-64 degrees F.) but this does not have much effect on the temperature in the U-Boat although it greatly increases the comfort due to the fact that the humidity is reduced by 1-1/2% per hour. In addition it may producE as much as 2-1/2 gallons of fresh water per hour which can be used for washing purposes.

NATURALLY! ONE DOES NOT DRINK THE WATER RECLAIMED FROM AIR FILLED WITH SWEAT-SOAKED UNBATHED SAILORS EVEN ON A 'PIGBOAT'! LINDE OF COLGNE HAS A LONG HISTORY OF INDUSTRIAL GAS TRANSFER TECHNOLOGY BUT IT SHOWED NOTHING ON WWII U-BOAT AC TECHNOLOGY; PERHAPS A GERMAN TRANSLATION CAN BE FOUND http://www.fundinguniverse.com/company-histories/linde-ag-history/