Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 156
e oil due to heating. The water circulation isarranged as illustrated. pumped. The case is filled with oil, which by thermo-circulationflows upward through the coils, transferring the heat absorbedfrom the coils to the water; on cooling it becomes more dense(heavier) and descends along the inside… … Ques. In watercooled transformershow much coolingsurface is requiredfor an internal cool-ing coil? Ans. The surface ofthe cooling coil shouldbe from .5 to 1.3 sq.in. per watt of totaltransformer loss, depend-ing upon the amount ofheat which the externalsurface of the trans-former case will…
Electrical engineering
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