Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 326
. In order to com-pare properlj the performances of different boilers, ROGERS DRAWING AND DESIGN. 355 their actual evaporation must be reduced to anequivalent evaporation from and at 212° F. Theproblem may be stated differently as follows : It isnecessary to find what would be the evaporation if… … Fig. 515. the feed water would be at 212° F., and the deliv- Example: If a boiler generates 2,000 lbs. of ered steam at o gauge pressure. steam per hour at a pressure of 100 lbs., and if the To find the equivalent evaporation of a boiler, j temperature of the feed water is 70°, what is the proceed…
Mechanical drawing · Machine design
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