pump.The performance curves based on the ethylene glycol solution will be compared to those developed using water as the base to examine the effect, if any, the viscosity and density of the liquid has on the pump.EXPERIMENTAL SET-UPA process flow diagram of the pump system is shown in Figure 1. The main components of the system are a centrifugal pump with a 4-inch impeller, a 2-horsepower motor, a piping system with an effective length of about 285 feet, a rotameter for low liquid flow rates (0-2 gpm), a magnetic flow meter for high liquid flow rates (0-90 gpm), and a tank.The liquid is pumped from the tank and sent to either the rotameter or the magnetic flow meter, depending on what flow rate is desired. After the flow rate is set, it is either sent to the pipe loop for the determination of pressure drop and pipe fouling, or it is recycled back to the tank. An inverted manometer is used to measure the small pressure drops (2 psi or less) at the low flow rates.Figure 1: Process Flow Diagram for Pump and Piping SystemEXPERIMENTAL PROCEDURE AND DATA COLLECTIONFirst, make sure the valves on the suction side of the pump are wide open, and remain that way throughout the course of the experiment. Next, close the valves on the pump discharge side and the valve at the bypass line from the pump to the feed tank. Measure the pressure the liquid exerts at the pipe exiting the tank while the pump is off to obtain the static head. Take a sample of the ethylene glycol solution and measure both the specific gravity and the temperature of the solution.Open valves A, B, and C on the manometer. If the liquid level in both standpipes is not the same, then the lines need to be bled as follows. Close all the valves to the standpipes, except for valve C, placing a bucket at the end of the tube to catch the fluid. Open the valve to the magnetic flow meter, start the pump, and adjust the flow to about 10 to 12 gpm. Once the fluid purges the line, ...
