Term paper The compulsory final-term paper is wort Essay Assignment Help

Term paper The compulsory final-term paper is wort Essay Assignment Help

EAT118 Energy Conversion Coursework 2015-2016 A reservoir empties by gravity into a second reservoir via an inclined pipe system, as shown in Fig. 1 (final page). Both reservoirs are open to the atmosphere and the difference in levels is h. Since the reservoirs are large, h can be assumed to be constant. Using the individual data assigned to you, calculate: The volumetric flow rate Q through the pipes connecting the reservoirs. The velocity of the water in each pipe and hence the corresponding Reynolds numbers. The secondary loss coefficients associated with the entry to the first pipe (kL1) and final reservoir (kL5) are shown in Fig. 1. You will need to calculate the loss coefficients for the gradual contraction (kL2) and sudden expansion (kL4), using the data assigned to you. The loss coefficient associated with the bends (kL3) is assigned. You will also be assigned values for the Darcy Weisbach friction factors for each pipe, f1, f2 and f3, as well as the lengths and diameters of the different pipes, and the angle (q) to be used in conjunction with Figure 2. Assume that the dynamic viscosity and density of water are 1.3?10-3 Pa s and 1000 kg/m3, respectively. Note: Your solution MUST be handwritten. All intermediate working must be shown. Marks will be deducted for untidy or illegible work. This assignment contributes 25% to the overall module mark. The loss coefficient associated with the gradual contraction can be estimated from the parameters D1, D2 and q, shown in Fig. 2a, in conjunction with the chart shown in Fig. 2b. The loss is then v 2 given by kL 2 22g . Fig. 2a Fig. 2b Marking scheme: Correct statement of Bernoulli s equation 10 Losses in each pipe, as functions of Q2. Where appropriate, you should also 48 state any calculated loss coefficients. Volume flow rate Q (m3/s) 10 Flow velocities and Reynolds numbers in pipes 1, 2 and 3 12 Presentation and clarity of the work, including intermediate calculations. 20 You should present your main results in a summary table, following the main calculations. Total 100 Fig. 1 Reservoir pipe system Gradual Gradual Gradual Gradual kL1 = 0.35 contraction, kL2 contraction, kL2 contraction, kL2 contraction, kL2 Pipe 2: Pipe 2: Pipe 2: Pipe 2: Pipe 2: Pipe 2: Diameter D2 Diameter D2 Diameter D2 h Diameter D2 Diameter D2 Diameter D2 h Diameter D2 Diameter D2 Diameter D2 h Pipe 1: Pipe 1: Length L2 Length L2 Length L2 Diameter D1 Diameter D1 Length L1 Length L1 Sudden Sudden expansion, kL4 expansion, kL4 expansion, kL4 expansion, kL4 Bends, kL3 Bends, kL3 Bends, kL3 Bends, kL3 kL5 = 1.0 Pipe 3: Diameter D3 Length L3 EAT118 ENERGY CONVERSION individual data (all lengths/heights given in metres, q in degrees) h q D1 D2 D3 kL3 L1 L2 L3 f1 f2 f3 96 125 2.6 1.1 2.7 0.2 85 755 55 0.006 0.04 0.007


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