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Engineering · Mechanical Engineering
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A pump is required to provide 6 cubic metre per minute of coolant through a steel pıpe of ID 15 cm that runs to and from the coolant reactor which is 140 m away The coolant reactor has an equivalent lenqth of 35 m of the same steel pipe On the way to the reactor, the coolant must pass through 4 x 90° elbows and 2 swing check valves Assume the coolant has a kınematic viscosıty of 1 56 x 10-6 m2/s and use the FANNING moody dıagram below to estmate the fnction factor, The equivalent lengths of the elbows and valves are 2 5m and 14m respectively 4 1 How much head must the pump provide? 4 2 Would you expect the required head to increase or decrease with usage tıme? Explain (10) your answer Sketch the effect explained in 1 2 on a system curve and determine its effect on the overall flow rate if the pump setting is unchanged 4 3 44 The location of the valves and elbows are such that they are equally spaced with all 4 elbows being sandwiched between the 2 valves Plot the HGL and EGL (10) 0,02 0,0181mınar 0,016 0, 014 0 05 o04 * fully turbulent 0 03 0,012 0 02 0015 切 0,01 0010 O008 : 0006 f o,oos 0,007 0,006 0,0055 0,005 0,0045 Concrete 0,004 L Cast 0,0035-commercial steel 0,045 f one 0002 - s (mm) 0,3-3 0,26 0 0010 0006 00004 O 0002 galvanised iron 0,15 o,0015 0.079 Re°> Drawn tubing 0,003 Glass, plastic smooth 0,2 5 sO 00002 0 00006 00004 0,0025 Vd Reynolds number Re = eva

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