Pump Characteristics INTRODUCTION
In industry, the performance specifications for a particular pump may be known, but the tests are usually based on water as the pumping medium. For liquids of significantly higher viscosity than water, these performance curves may only be accurate at certain flow rates, or they might not be valid at all, and it might be necessary to recalibrate the specifications for higher viscosity liquids.
The purpose of this experiment is to examine the performance and characteristics of a centrifugal pump, its motor, and the corresponding piping system, used to pump an ethylene glycol solution. The pump used in this experiment has a performance curve based on water, so pump performance curves, as well
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In order to study the characteristics, the performance of the pump and the motor are studied. The performance of the pump can be determined by capacity, total head loss, brake horsepower, efficiency, liquid horsepower, pump efficiency, and net positive suction head.
The capacity is the rate at which the liquid (ethylene glycol) flows through the pump and is expressed in gallons per minute. The capacity affects other parameters of the pump’s performance. The capacity is chosen such that the efficiency of the pump is high.
The total head is the pressure available out of the pump that result from the change in the mechanical input energy into kinetic and potential energy, i.e. the energy that the pump transfers to the liquid. On the pump curve, the total head is the difference between the discharge head and the suction head. The total head for a liquid is dependent on rotation speed and capacity. Thus, the total head for is independent of the fluid that is being pumped and is constant for different fluid under the same capacity and rotational speed. The total head, as seen in Figure 2, decreases as the capacity
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The friction head loss is the energy dissipated in the system - the higher the head loss, the higher the friction factor. The velocity of the liquid also effects the friction factor as they are inversely proportional. Bibliography:
Al-Dahhan, Muthanna. ChE 374 Laboratory Manual: Experiments in Heat-Mass-
Momentum Transport. Washington University, 1997.
Baker, Donald, and Shryock, Howark. Journal of Heat Transfer. “A comprehensive approach to the analysis of cooling tower performance.” August, 1961
Hensley, J.C., ed. Cooling Tower Fundamentals. The Marley Cooling Tower Co. 1982.
McCabe, W.L., Smith, J.C., and Harriott, P. Unit Operations of Chemical Engineering.
5th edition. McGraw-Hill, 1993.
Perry, R., Green, D., and Maloney, J. Perry’s Chemical Engineers’ Handbook. 6th edition. McGraw-Hill, 1984.
Smith, J.M., and Van Ness, H.C. Introduction to Chemical Engineering
Thermodynamics. 4th edition. McGraw-Hill, 1987.
Welty, James R., Wicks, Charles E., and Wilson, Robert E. Fundamentals of Momentum,
Heat, and Mass Transfer. 3rd edition. John Wiley & Sons,
1988-2000 Starting over with a $100,000 gift from his dad, he started feeding cattle and drilling oil wells using the newly developed “horizontal drilling technology”. In 1990 he moved to Lufkin, Texas where he continued feeding cattle and drilling oil wells. In 1992 he assembled a 36,000 acre drilling block in Avoyelles Parish, Louisiana and through 1996, had drilled the five deepest horizontal oil wells in the world. Unfortunately the Louisiana venture was a technical success, but it was a financial failure. None of the five wells ever paid out. In 1993 he married Rita Irene Ambrosia and they still live in Lufkin where he continues to manage his oil and gas properties and invest in cattle futures.
A composite hose with flanges on both ends compose the basic structure of the peristatic pump. And the discharge lines of the system and the suction are connected by the flanges. The shell contains a rotor mounted on the shaft which support its own bearing. In the casing , there are two or more pressing ‘shoes’ are fixed. The principle of the peristaltic pump is simple. As showed in the figure1. Between the rotor and the tube-bed, the tubing is relatively fixed. There are three position A,B and C which are all squeezed. The rollers-pressing shoes on the rotating rotor go through the pipe. Then the tubing is pressed continuously by the rollers just like the fingers. And the liquid in the tubing is pushed along the revolving rotor. After that the tube in the back of the roller restore the original shape as well as create a vacuum which extract the liquid behind it. Between
The purpose of this lab was to investigate which additive(s) will create the longest lasting oil-in-water emulsion.
He was raised on High Holborn Street in Central Kingston, remaining there until 1955 when he moved to the Waterhouse district. (1) His career took off very slowly, as it did not have a title, never mind an available position, at that time. He began working as a radio technician, or repairman, and by the late 1950’s, had already started experimenting with sound system amplifiers, manipulating the available sounds to ones that sounded native of outer space.
To discuss the power output, first the cycles of the engine itself needs to be mentioned.
Working: when water ingression occurs in stern tube some kind of bio-lubricants can absorb any sea or fresh water entering the tube and form a stable emulsion thereby reduci...
To investigate the osmotic effect of changing the concentration of sucrose solution; distilled water, 20% sucrose solution, 40% sucrose solution, 60% sucrose solution on the change in mass of potato cylinder after 30 minutes of being in solution.
...pany, here, my investors and I set up a laboratory at 89 Liberty Street in Manhattan so that I could work on me plans and prototypes of my inventions. Mostly, i focused my efforts on AC current generators and means to transport that power to the public. After I had worked and produced one of these generators, a friend of mine, asked me to present and show off my generator at the American Institute of Electrical Engineers. A fellow inventor, George Westinghouse, who was also working on an AC motor, decided to buy my polyphase induction motor and transformer designs for $60,000 in cash as well as stock. He also decided to pay me $2.50 per AC horsepower produced by each motor to sweeten the deal. Westinghouse also decided to hire me for 2,000 dollars a month as a electrical advisor and technician and the Westinghouse Electric & Manufacturing Company's Pittsburgh labs.
Normally, emulsified water is generally present in crude oil as a result of the mixing occurring during production operations and referred to as oil field emulsion. This emulsion can be encountered at numerous stages include during drilling, producing, transporting and processing of crude oil. However, the formation of emulsion creates problems in oil field industry. They might increase the cost of production and also transportation; accumulate in the refinery tank age, pipeline corrosion, equipment failure, plugged pipeline. For economic and operational reasons, it is necessary to remove water completely from the crude oil emulsion before refining and transporting those. In order to separate the water content of the produced crude oils, the emulsions have to be broken through demulsification process.
(2)In this paper, we will use Eq. (2) to determine the viscosity with an input of experimental measurements of Pxy and γ.
then later became a electrical engineer for a telephone company in Budapest. When all of the
Is it ethical or even helpful to try to impose order on a haphazard existence? Is it right to play God, to steal the limelight from the cosmos? Man used to ponder existence, but with the increasing possibilities of science, we now ponder our power over existence. In “An Experiment with an Air Pump,” Shelagh Stephenson uses symbolism associated with Isobel as a voice of foreboding in a society “enraptured by the possibilities of science” (3). Stephenson associates Isobel with a bird, a pile of bones, and a sheep to reveal the dark side of the “light,” the scientific revolution.
The ECU enters in an internal 3D table (that engineers have previously filled in with calculated values) with three variable values: spinning regime, percentage of actuated throttle pedal and engine temperature. With these parameters the ECU looks for a value in the table and extracts an estimation of the torque.
Sometimes where a motor is mounted causes its output shaft to be at 90° to the machines input shaft. This requires the use of a gearbox that has an output that is 90° to its input. Gearboxes can have input shafts with output shaft...