Transactions, Volumes 4-5

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1898 - Founding
Vols. 5-6, 9- include the Proceedings of the annual meeting.

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Page 101 - Company for different types of fans: but these values must be applied with great discretion, acquired through experience and a thorough knowledge of all the conditions liable to affect the fan in operation. An approximate value of x for general practice is not far from 3, but this is to be used only to
Page 352 - If such things be done in the green tree what shall be done in the dry?'
Page 310 - THE NEW YORK PUBLIC LIBRARY REFERENCE DEPARTMENT ThU book is under no circumstance» to be taken from the Building fl)
Page 101 - of pipes, passages and material through which the air must pass have the effect of reducing the free inlet or outlet of the fan. The square inches of blast, or, as it may be termed, the capacity area of a cased fan. may be approximately expressed by
Page 99 - is, eight times the power is required at twice the speed. The reason is evident in the fact that the pressure increases as the square of the velocity, while the velocity itself
Page 100 - of power is actually furnished, its expenditure will entail great loss in efficiency as compared with that required to operate a fan properly proportioned to the work. In the design of a wheel to meet given requirements it is necessary to make its peripheral speed such as to create the desired pressure, and then to so
Page 102 - the escape of only a small amount of air. When a fan is employed for exhausting hot air or gases, the speed required to maintain a given pressure difference is evidently greater than that necessary when cold air is handled, the difference being due, and inversely proportional, to the absolute temperature.
Page 99 - These curves are based upon the facts that the volume varies directly as the speed, the pressure as the square and the horsepower as the cube of the speed. Thus it is shown by the curves that if the speed is doubled the volume is also doubled, the
Page 96 - ounces per square inch, while delivering a relatively small volume of air. To this end the wheel must be narrow and operated at high speed. In operation, the peripheral discharge fan sets in motion the air within it. which, acting by centrifugal force, is delivered tangentially at the outer circumference of the wheel. Air rushes in at the axial inlet to
Page 81 - that you will all agree with me that this is one of the most valuable papers that has ever been presented

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