C, KOHER, DEVICE FOR THE RECUPERATION OF AVAILABLE HEAT ON STEAM LOCOMOTIVES PROVIDED WITH SURFACE CONDENSERS, 1,342,544. APPLICATION FILED SEPT, 25, 1919, Patented June 8, 1920.

UNITED STATES PATENT OFFICE. CONRAD KOHLER, OF ZURICH, SWITZERLAND. DEVICE FOR THE RECUPERATION OF AVAILABLE HEAT ON STEAM-LOCOMOTIVES PROVIDED WITH SURFACE conDENSERs...... 1,842,544. - specification of Letters Patent. Patented June 8, 1920. Application filed September 25, 1919. Serial No. 326,338. To all whom it may concern: . a locomotive driven by a steam turbine and Be it known that I, CoNRAD KoHLER, a. provided with a surface condenser. - citizen of the Republic of Switzerland, re- 1 designates the main steam turbine- driv siding at Hardturmstrasse 19, Zurich, Swit ing the locomotive. The exhaust steam of 5 zerland, have invented certain new and use thistlirbine 1 is discharged through the con 60 ful Improvements in Devices for the Re necting pipe 2 into the surface condenser 3. cuperation of Available Heat on Steam-Lo The water of condensation or condensed comotives Provided with Surface Condens steam collecting on the bottom of this con ers; and I do hereby declare the following denser 8 is drawn through a pipe 4 covered O to be a clear, full, and exact description of with non-conducting material by a pump 6 65 the invention, such as will enable others driven by an auxiliary turbine 5 and it is skilled in the art to which it appertains to then discharged through a pipe 7, also cov make and use the same, reference being had ered with non-conducting material, into a to the accompanying drawing, and to letters recuperator or feed heater 8. The latter is 5 or figures of reference marked thereon, heated by the exhaust steam of the auxiliary 70 which form a part of this specification. turbines 5 and 10, which drive the pumps 6, This invention relates to a device for the 6 and the fan 9 respectively, the exhaust recuperation of available heat on a steam Steam being Supplied to said feed heater 8 locomotive provided with a surface con through the pipe 11. The water of con 20 denser. According to this invention the con densation heated in the recuperator 8 to a 75 densed steam discharged by the surface con higher temperature could now be fed into an denser is forced at first through a recuper intermediate tank or reservoir. 15 connected ator or feed heater heated by the exhaust to the boiler feed pump. In order to heat steam of auxiliary machines of the locomo however said water of condensation to a still 25 tive and then through a recuperator or feed higher temperature, it is fed from the re heater heated by the flue or combustion gases cuperator S through the pipe 12 covered of the boiler and is finally pumped into the with non-conducting material into a second boiler. recuperator or feed heater 13 which is heat At the present time electric locomotives ed by the flue or combustion gases of the 30 are introduced more and more in the rail boiler 14 of the locomotive. It is only from 85 way traffic because it is found that the work this second recuperator or feed heater 13 ing with electric locomotives is, at least in that the Water of condensation or the con countries where water powers are available densed steam is supplied through the pipe and coal is expensive, more economical than 16 into the intermediate tank 15 connected the working with steam driven locomotives. to the boiler feed pump by means of the pipe 90 Electric locomotives are however dependent 17. The pipes 16 and 17 are also covered on at least one central power plant. Conse with non-conducting material. When the quently, all locomotives are stopped when Water of condensation discharged from the the central power plant or the intermediate Surface condenser 3 has for instance a tem 40 conduits fail to deliver power. Owing to perature of 50° C., it can be heated in the 95. this, it is still preferred, particularly also first feed heater or recuperator 8 up to for military reasons, not to centralize the 80°-90° C. and in the second-feed heater delivery of the power required for the work or recuperator 13 up to 130°. C., so that it ing of railways and to drive each single contains a much greater quantity of heat 45 locomotive independently of the other ones. energy than in the case in which it would be 100 This is only possible, however, when using directly used after leaving the surface con steam locomotives. It is therefore the task denser 3 for feeding the boiler of the loco of the railway engineers to design steam lo motive. When required, additional water comotives working in a more economical can be supplied to the condensed steam con 50 manner and to take advantage in the best tained in the intermediate tank 15. 105 possible way of any available energy of heat. I claim: This task is fulfilled by a device designed 1. In a locomotive driven by a steam according to the present invention. - power engine and provided with a surface The accompanying drawing illustrates by condensing plant, which plant comprises 55 way of example a diagrammatic side view of auxiliary machines driven by steam-power. 110 2 1342,544 engines and means for reconveying the con 3. In a locomotive driven by a steam densed steam into the boiler of the locomo power engine and provided with a surface tive, a device for heating the condensed condensing plant, which plant comprises steam...that has to be conducted from the Sur auxiliary machines driven by the steam 30 face condenser back into the boiler, said power engines and means for reconveying device comprising a feed heater heated by the condensed steam into the boiler of the the exhaust steam of said auxiliary - locomotive, a device for heating the con -chines, a feed heater heated by the combus densed steam that has to be conducted from tion gases of the boiler, and means for con the surface condenser back into the boiler, 35 ducting the condensed steam successively said device comprising a feed heater heated 10 (through said two feed heaters. by the exhaust steam of said auxiliary ma 2. In a locomotive driven by a steam chines, a feed heater heated by the com power engine and provided with a surface . bustion gases of the boiler, means permit condensing plant, which plant comprises ting the condensed steam to pass succes 40 5. auxiliary machines driven by steam-power -sively through said two feed heaters, and engines and means for reconveying the con an intermediate tankarranged behind said densed steam into the boiler of the locomo - two feed heaters and from which the heated tive, a device for heating the condensed condensed steam is drawn out by the pump steam that has to be conducted from the forcing it into the boiler. 45 20 surface condenser back into the boiler, said In testimony that I claim the foregoing as device comprising a first feed heater heated my invention I have signed my name. by the exhaust steam of said auxiliary ma chines, and a second feed heater-heated by CONRAD KOHLER. the combustion gases of the boiler, said sec Witnesses: ond feed heater being arranged in series ARNOLD LEHNER, 25 with the first feed heater. JEAN SCHAAD.