Piping specifications ignored

There will be a pressure drop and heat gain in the suction line, and these are frequently ignored if the pipe run is short. In other cases, some allowance must be made. Both these factors will increase the specific volume. 

In laminar flow/ = 16/Re, whereas in turbulent flow the dependence of/ on Re is a function of the specific rheological behavior of the fluid and roughness of the walls of the inside of the drill pipe (91). A number of functional relationships between / and Re have been proposed for turbulent flow. Ignoring the effects of the roughness of the surface of the drill pipe, / can be approximately related to Re by a generalized form of the well-known Blasius equation for Newtonian fluids (90, 95)... 

The entropy generation is calculated from the Bernoulli equation. We set Az. = o (the pipe is horizontal) and W, = o (there is no pump in this segment of the pipe). Ignoring the slight change of specific volume due to the pressure... 

Here, special caution is advised. The site management should be urged to pay attention to the compliance with the specifications of the released HVAC-plans by the company assigned with the installation of the HVAC-facilities. It has to be taken into consideration that, at that point in time, the building or steel construction is still completely empty. Sometimes, plumbers wonder why they should, for example, lay a supply line around three corners although the direct connection would be much easier. Here, they ignore the fact that the direct cormection could possibly lead to a collision with a large pipe of the actual plant ... 

A pitot static tube (Fig. P6.10) is used to measure the volume rate of flow in a pipe Q). For the fully turbulent condition viscous forces may be ignored. Perform a dimensional analysis for the volume rate of flow (0 as a function of A/> (between A and B which is equal to yji where = specific weight of manometer fluid), D, and r for the fluid in the pipe. IfAp increases by a factor of 2, what is the corresponding increase in the rate of flow ... 

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