Supercharging

In some cases when drilling fluids invade a very low permeability zone, pressure equalisation in the formation can take a considerable time. The pressure recorded by the tool will then be close to the pressure of the mud and much higher than the true formation pressure. This is known as supercharging. Supercharging pressures indicate tight formation, but are not useful in establishing the true fluid pressure gradient. 

Satisfactory engine performance is assured by maintaining a minimum log that allows comparison of present characteristics with past records of (1) cylinder exhaust, cooling water, and supercharger exhaust temperature for similar loadings, (2) running sounds and smokiness of exhaust, and (3) engine efficiency and losses. 

Woodhouse, H., Inlet Conditions of Centrifugal Compressors for Aircraft Engine Superchargers and Gas Turbines, J. Inst. Aeron, Sc., Vol. 15, 1948, pp. 403. 

Around 1930, in Ameriea, presumably with the early superchargers in mind, several metallurgists sought to improve the venerable alloy used for eleetric heating elements, 80/20 nickel-chromium alloy (nichrome), by adding small amounts of titanium and aluminum, and found significant increase in creep resistance. 

Air is supplied to the power cylinders by either natural air flow associated with the engine or by some external means. Engines that use no external means of air supply are termed to be naturally aspirated. Those with some external air supply are generally termed supercharged. The horsepower developed by an engine is dependent on its supply of air. The more air mass contained in a cylinder at ignition the more fuel that can be burned and the more horsepower that will be developed by the cylinder. 

Uberlasten, t.t. overload, overburden, over charge supercharge overtax, tfberlauf, m. overflow net profit. 

CE Service typical of certain turbocharged or supercharged heavy-duty diesel engines operating under both low speed-high load and high speed-low load conditions. Oils designed for this service must also meet the requirements specified for CC and CD classifications. 

Further progress in stabilizing highly charged anions was achieved by the appK-cation of unconventional solvents such as ammonia or dimethylamine at low temperatures. Using these solvents it was possible to observe the reversible generation of supercharged anions at low scan rates in voltammetric experiments [34, 35]. 

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