This joint contribution by the Swiss Engineering Industry is in a way a continuation of the theme started at the Third and Fourth World Petroleum Congresses, viz: "Sulphur and Ash in Fuel Oils" by the Swiss Engineering Industry. The Hague 1951; "The Prevention of Oil Ash Deposition by Means of Fuel Additive" by Peter T. Sulzer and "Experiences in Service with Gas Turbines Using Heavy Fuel Oil and the Application of Gas Turbines in the Petroleum Industry" by Hans Pfenninger, both Rome 1955. In this paper the Swiss Companies manufacturing gas turbines have contributed their recent experience in the field of fuel additives for gas turbines. Escher Wyss describes laboratory experience they have accumulated with the dolomite additive for protection against the corrosion of austenitic steel tubes such as used in air heaters of closed-cycle gas turbines at 700-800°C (1300-1470°F). The Sulzer portion of the paper provides their thinking regarding the chemical and physical background of additive action and furnishes experimental data on the effect of various substances against deposits and corrosion in an experimental industrial-type open-cycle gas turbine at temperatures of 620, 650 and 680°C (1150, 1200 and 1250°F). The Brown Boveri contribution summarizes practical experience with large open-cycle gas turbines in power stations. It appears from all this experience that the maximum temperature for industrial gas turbines burning regular commercial grades of residual fuel can be raised from 620-650°C to 650-680°C (1150-1200 to 1200-1250°F) with the use of appropriate fuel additives. For still higher temperatures, special fuels with little or no ash should be used.
Cette contribution apportée par l'Industrie hisse de Machines constitue pour. ainsi dire une suite du thème développé lors des 3ème et 4ème Congds Mondial du Parole: "Sulphur and Ash in Fuel Oils" par l'Industrie Suisse de Machines, La Haye 1951; "The Prevention of Oil Ash Deposition by Means of Fuel Additive" par Peter T. Sulzer et "Experiences in Service with Gas Turbines using Heavy Fuel Oil and the Application of Gas Turbines in the Petroleum Industry'" par Hans Pfenninger, Rome 1955. Dans la présente communication, les trois maisons suisses fabriquant des turbines à gaz exposent leurs récentes expériences dans le domaine des additifs incorporés au combustible utilisé dans des turbines à gaz. Escher Wyss décrit des expériences de laboratoire avec une addition de dolomite contre la corrosion des tubes en acier austénitique utilisés, par exemple, dans ie réchauffeur d'air des turbines à gaz à cycle fermé à des températures de 700-800" C. Le rapport de %her donne des considérations sur l'action chimique et physique des additifs et communique les résultats expérime
