Pump_bypass_example - Example Problem Parallel Pipe Network...

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Example Problem – Parallel Pipe Network and Pump Bypass System Given : In some applications (e.g., nuclear reactor cooling), it is critical that the volume flow rate of a fluid remains constant, regardless of head changes in the system downstream (within specified limits, of course). One method of ensuring a constant volume flow rate is to install an oversized pump to drive the flow. A bypass line is then installed in parallel with the pump so that some of the fluid (bypass volume flow rate b V ± ) recirculates through the bypass line as shown. Based on feedback from a downstream volume flowmeter, the bypass valve is then adjusted by a computer to control both b V ± and the volume flow rate through the pump p V ± such that the volume flow rate d V ± downstream of the system remains constant. In this particular case, water ( ρ = 998 kg/m 3 , μ = 1.00 × 10 -3 kg/m·s) needs to be supplied at a constant downstream volume flow rate of d V ± = 0.20 m 3 /s.
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This note was uploaded on 07/23/2008 for the course ME 33 taught by Professor Cimbala during the Fall '05 term at Pennsylvania State University, University Park.

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Pump_bypass_example - Example Problem Parallel Pipe Network...

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