Abstract
The several positions in engine fluid systems in which cooling equipment is commonly used are examined and the fluid pressures and temperatures to which the heat exchangers are subjected outlined. General considerations affecting the designs from the points of view of performance (heat transfer and power loss) and environment (chemical and mechanical) are examined and amongst other points it is shown that the best ratio of cooling surfaces in a secondary surface heat exchanger is
If ρ = 1 this reduces to r = √R which is very different from the usual recommendation that r and R should be equal.
The second part of the paper is descriptive, and deals with the mechanical design of heat exchangers used for cooling engines in various applications: marine engines; stationary engines; locomotive and railcar engines; agricultural machinery; road vehicles; and aircraft.
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