Download e-book for iPad: Heating Services Design by Ronald K. McLaughlin

By Ronald K. McLaughlin

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38, where V is the average velocity in the pipe. The magnitude of Κ depends upon the shape and construction of the fitting, the more tortuous the passage followed by the fluid the greater the pressure loss. 3 and more information is given in Chapter 9. 0 36 The Fundamentals of Fluid Flow References (5) and (7) contain sufficient information on loss factors for most design purposes, although where necessary the designer should consult the relevant manufacturer's data. 7 Bends The loss of pressure in bends is greater than that experienced in the same length of straight piping.

The magnitude of Κ depends upon the shape and construction of the fitting, the more tortuous the passage followed by the fluid the greater the pressure loss. 3 and more information is given in Chapter 9. 0 36 The Fundamentals of Fluid Flow References (5) and (7) contain sufficient information on loss factors for most design purposes, although where necessary the designer should consult the relevant manufacturer's data. 7 Bends The loss of pressure in bends is greater than that experienced in the same length of straight piping.

The precise functional relationship between these groups can be determined only by experimentation, but by working in terms of such dimensionless parameters the number of quantities to be studied is significantly reduced, the number of experiments is minimised and the interpretation of experimental data is greatly aided. The basis of dimensional analysis is the simple premise that any equation characterising a phenomenon must be dimensionally correct. The first step in the procedure is to select a system of primary dimensions and to express the variables entering the physical situation in terms of these dimensions.

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