The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

Two electric driven rotary pumps of vertical type are provided for freshwater cooling, each of which has a capacity of 750 tons per hour against a head of 98 feet. Two parallel connected freshwater-return coolers of horizontal type are pro- vided each of which has a cooling surface of 3500 square feet. The freshwater flows over the_ pipes through which the seawater circu- lates. The cooling pipes consist of a copper-nickel alloy with 20 per cent nickel. Both seawater cooling pumps are vertical types with a ca- pacity of 800 tons per hour against a head of 65.6 feet. Two electric driven pumps, each with a 70-ton per hour capacity, cir- i. ports three to four diesel generators and while in port two to three diesel generators; sufficient current is therefore provided for all pur- poses. The 25-kilowatt diesel gen- erator can supply current for emer- gency lighting, emergency bilge pump, gyro-compass, wireless plant and siren. The five main generators are op- erated in parallel in conjunction with the safety switchboard system of Carl Meyer. By means of this a con- tinuous uninterrupted flow of current is asSured for all important current requirements even if a generator fails or becomes overloaded. The auxiliaries, wherever possible. are electric driven; the following are installed: culate the lubricating oil to the main 9 engines. These pumps draw the oil ‘as Hiekee i BN power from the double bottom oil tanks and 37 Motors, ventilation, total........ LTy pass it through double filters, oil 60 '(Approx.) motors fox anc coolers and then to tanks from which % LN AYICRS oS otevcncrchns uot 2593 it flows through a main line to the various lubrication points of the en- gines. Even in the tropics one oil pump is sufficient for both engines, the other being held as a stand-by ready for immediate operation. Each oil cooler has 485 square feet of cooling surface. The oil flows around the tubes through which the sea- water circulates. These pipes are of a copper nickel alloy and are rolled tight in bronze tube sheets. Air for maneuvering is supplied by two high-pressure compressors with a capacity of 282 cubic feet per min- ute, driven by geared motors. Scav- enging air for each motor is sup- plied by rotary blowers each of which normally draws 238,300 cubic feet per minute and with a maximum water column pressure of 55 inches. Each blower has two 100-kilowatt motors one of which serves as a spare. Each, furthermore, has a spe- cial regulator to govern the speed from 1800 to 2600 revolutions per minute. Relays are connected with the maneuvering device of the main engines so that changing the speed of rotation of the engines increases or decreases the speed of the blow- ers. When stopping and starting, the electrically actuated throttle SSN t} $ Section, diesel engine, M. 8S. Caribia valve in the scavenging pressure line opens and closes automatically. Electric Generating Plant In the auxiliary engine room are four diesel driven, direct current generators each of 300 kilowatts ca- pacity and one steam turbine driven direct current 250 kilowatts gener- ator; furthermore, an emergency diesel dynamo of 25 kilowatts is lo- cated in the engine room trunk above the waterline. The total current pro- duced is therefore 1475 kilowatts with an output voltage of 230 volts and a line voltage of 220 volts. At sea two to three diesel generators and the turbo-generator are nor- mally in operation; when entering 50 Motors, deck machines, total.... 717 40 Motors, various purposes, total 82 187 Electric motors, total............ 8519 Large motors in the engine room are provided with two auxiliary pow- er actuated multiple switches instead of the usual single switches. By eliminating all single switches con- siderable space has been saved in the engine room. For starting and stopping the motors push-buttons are used. The following motors are con- nected to the two automatic switches: two scavenging blowers (four mo- tors), two starting compressors, two seawater cooling pumps, two fresh- water cooling pumps, two lubricat- ing oil pumps, one bilge and fire extinguishing pump, two. sanitary and fire extinguishing pumps and two refrigerator compressors. The principle of multiple starting is also applied to the small motors in the engine room as well as the ship’s ventilators, but for each group a manual multiple switch is provided. After completion of the starting op- eration the motor is returned to starting position by a lever reversing switch. The galley equipment, ranges, baking ovens, water boilers, etc., fro [ Weele J as rst Cass sho? At ass, Srdcball ar gor | | BStis= 32Classe | 9 9% %2 cat dae 1 2 First Class _ Wee ee i Ag Pe ------; > - > tt Te eR Tee RO © \Cargol J oo ioe i Lhe ase==t Ee eal i ris \ LRA An ere H Pa ‘ HSER see caer e rs Ss poco eee cat aes ee ee en bagoE fy eargore ranean: Engine \ Auxiliaries O// Bunker: Lame H Cargo | CargoT| | ! i ; "Refrigerating 1 ves t L pie juntel \ arg I H Sates Water | ----=-- -_—_-——______ | r ate eal a 5 € on suas OO THODETE RIOT ne 1 AS 2) 140 150 {60 170 -12-8-40 40 20 30 40 50 60 7o 80o 90 /00 HO 120 — 13 Twin screw combination passenger and cargo Motorship Caribia, Hamburg-American Line. Speed 17 knots MARINE REVIEW—May, 1933 Ipr