Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 521
Ftg. 393. 466 MECHANICAL ENGINEERING OF POWER PLANTS. tubes which nave to be of small diameter and essentiallyvertical, the double tube has been used, sometimes called theField tube. Within the water-tube is ar open inner concentric … Fig. 394. tube, reaching nearly to the bottom of the outer closed tube,and held in place by fins or lugs. The diameter of this innertube is so chosen as to leave an annular space all aroundbetween the two tubes, which is to be the channel for ascend- TYPES OF BOILERS. 467 ing currents of steam-gas…
Mechanical engineering · Steam power plants
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