# Centrifugal pumps - characteristics

Size: px
Start display at page:

Transcription

1 University of Ljubljana Faculty of mechanical engineering Askerceva Ljubljana, Slovenija telefon: faks: Laboratory for Heat and Power Centrifugal pumps - characteristics Practical exercise Authors: Mitja Mori Boštjan Drobnič Ljubljana, October 010

2 1. Target of the exercise - Basics of centrifugal pumps installed in pipe systems and energy conversion in the pumps; - Basic characteristic curves obtained with the help of measurements of certain parameters; - Show the difference in characteristics at pump operation in parallel and serial mode;. Basics Armfield demonstration unit FM1 is an example of radial flow rotary machine (centrifugal pump), in which fluid flows into the rotor at a given radius and flows out at greater radius. In the pump kinetic, potential and pressure energy is changed. Fluid flows axially through the inflow part located in the center of the rotor (Figure 1), then the direction of flow is changed in the radial direction by the action of the rotor blade. The kinetic energy of the fluid is increased within the rotor and converted to pressure energy at the outlet. Figure 1: Cross section of centrifugal pump The interdependence between energy comes from the Bernoulli equation, which is a simplified equation of the conservation of energy, which takes into account only those forms of energy in the process of significantly changing stations. At each point of the system is: c g p z const. (1) c z p ρ g fluid speed height pressure fluid density gravitational acceleration Centrifugal pumps - charactersistics Page: from 1

3 The total energy of the fluid remains unchanged if there is no inlet or outlet power. When fluid is in motion, the part energy is used to overcome the flow resistance (power outlet), with the pump the energy is transported to the fluid. During the initial and end point in the system the energy balance equation can be written m W Č W tr c 1 p1 c p m g z1 W ρ1 ρ mass of observed part of fluid energy transported to the fluid by the pump energy loss due to friction Č m g z W tr () If we are dealing with uncompressible fluid it can be assumed that the density is constant. So the equation for pump work is W P c c m g g 1 p p p 1 resist z z g g 1 In this energy loss was due to the flow resistance expressed by Δp resis pressure drop, which is a direct consequence of energy losses. The term in brackets is called the pump head and is directly related to the energy that must be supplied to fluid, so it could be moved from point 1 to point. (3) H c c 1 g z z 1 p p ρ g 1 Δp ρ g up (4) Pump head is at the same time a feature of the pipeline and pump. In the pipeline it represents the energy needed for the desired quantity (flow) of water, while at the pump it represents the energy that the pump is able to give the fluid at a given flow. Since the mass flow has significant impact on the pump and pipeline head, this dependence is expressed by the diagram for specific pipeline. This diagram is named pipeline or pump characteristic. At the same time pump head is criteria on the basis of which can be concluded if pump is required in the specific pipeline or not. First three parts of equation (4) can be positive, negative or equal to zero. H > 0, that means that pump is required in the system to provide desired mass flow; H = 0, the pump is not required, the flow will establish by its self; H < 0, the pump is not required, for desired fluid mass flow the reduction valve should be installed to inhibit the fluid; Centrifugal pumps - charactersistics Page: 3 from 1

4 3. The UNIT 3.1. Basic description The unit FM1 that is shown on Figure consists from two centrifugal pumps (1) and () driven by motors. Pumps are placed on the platform and connected to reservoir (3) via pipelines. The unit enables to study operation of: - Single pump - Two pumps serial mode - Two pumps in parallel mode That can be done by opening/closing specific valves: V1 (5), V (4), V3 (6) in V4 (7). Figure :The unit for study centrifugal pumps operation and characteristics The mass flow of the fluid through pumps is regulated by control valve V (8). The appropriate position of that valve enables changing total head and volume flow. To measure operational parameters required for further analysis appropriate sensors are mounted on the unit. The data are saved to computer via interface IFD6 (9). Centrifugal pumps - charactersistics Page: 4 from 1

5 3.. Instrumentation and sensors On the unit specific sensors are mounted: 1. Differential sensor SPW1 (10) Differential sensor consists from piezzoresistance sensor and converter that converts pressure difference on the orifice (11) to voltage. With pressure difference on known orifice we are able to calculate volume flow in different operational points.. Differential pressure sensors SPW3 (1 in 13) Differential sensor consists from piezzo-resistance sensor and converter that converts pressure difference in pump to voltage. From data total head and theoretical power is calculated. 3. Optical proximity sensors SSO1 (14 in 15) Optical proximity sensors measure rotational speeds of pump s rotors. 4. Temperature sensor STS1 (16) Temperature sensor is classical NiCr-Ni thermocouple. 5. Power mesters SWA1 (17 in 18) Power meters are inverters that enable speed regulation and measure electrical power of motors Program interface Graphical interface in the program on the computer enables observing operational parameters and pump characteristics. With the program we can store measured and calculated data in all operational points of the system. The main menu is shown on the Figure 3. Sensors and program interface unit FM1 enables to observe and save operation parameters: (on figure 3 shown by blue rectangle): Differential pressure on orifice to measure volume flow, Δp 0 (Orifice Pressure), Differential pressure between inlet and outlet pressure on pump 1, Δp 1 (Pump 1 Pressure), Differential pressure between inlet and outlet pressure on pump, Δp (Pump Pressure), Rotational speed of pump 1, n 1 (Motor 1 Speed), Rotational speed of pump, n (Motor Speed), Electrical power of motor 1, P em1 (Motor 1 Power), Electrical power of motor, P em (Motor Power), Water temperature, T (Temperature). Centrifugal pumps - charactersistics Page: 5 from 1

6 Figure 3: The main menu of software for observing operational parameters of FM1 unit In the software calculated values are also shown: (green rectangle on figure 3): Water volume flow V (Volume Flow), Pump s total head (Total Head), Power output theoretical power (Power Output), Pump s efficiency (Efficiency), To obtain relevant calculated data, some parameters need to be properly set before measurements (purple rectangle on figure 3): Orifice constant (Orifice Cd) C d = 0,74 Operational mode of pumps (Mode) Single = one pump in operation Series = two pumps operating in serial mode Parallel = two pumps operating in parallel mode In addition to present above, the software enabled graphical and tabular presentation of measured and calculated data. That can be done with buttons in the main menu (orange rectangle in figure 3). To save one measured data set button GO has to be clicked once (red rectangle in figure 3), new set of measurements are start with button Next Results. By clicking it empty table is opened and results are presented with new additional curves on diagrams. Centrifugal pumps - charactersistics Page: 6 from 1

7 total head, power, efficiency total head, power, efficiency Faculty of mechanical engineering Laboratory for Heat and Power 4. Theoretical background 4.1. Characteristic curves of centrifugal pumps Characteristics of centrifugal pumps are usually presented in forms of total head H vs. volume flow, Power P vs. volume flow and efficiency η vs. volume flow for different rotational speeds of centrifugal pumps (figure 4). In diagram it is shown that efficiency peaks at specific volume flow and drops after, total head is falling from low to higher volume flows, where the drop is very significant. Optimal conditions correspond with point where efficiency is at peak value. total head power efficiency Figure 4: Characteristics of centrifugal pump for different rotational speeds (n a > n b > n c ) c flowrate b a c a b b c a With specific pump manufacturers gives diagram that represent pump working area. The diagram represents one parameter (efficiency or power) as a function of other two parameters (total head and volume flow) in the form of isoclines (figure 5) efficiency % power 50 kw flowrate Figure 5: Specific shell chart for centrifugal pump, rotor diameter 375 mm On the basis of parameters that measured, parameters are calculated on the basis of which characteristics of centrifugal pumps can be specified for all operational points: Water density, Volume flow, Centrifugal pumps - charactersistics Page: 7 from 1

8 Water speed on the inlet and outlet of the pump, Total head of single pump or total head of pumps in parallel or series mode, Power of single pump or power of pumps in parallel or series mode, Efficiency of single pump or power of pumps in parallel or series mode Water density Water density in kg/m 3 can be obtained with the help of thermodynamic tables or calculated with polynomial equation prescribed by ISO standard. Temperature is input data in following equation in C. ρ = 0, T 3 0, T + 0, T , (5) Water volume flow in the pipe Unit FM1 has orifice installed in the pipeline that enables to calculate water volume flow on the basis on pressure drop: C π d ρ p0 V D Δ (6) 4 ρ In eq. 7 C d = 0,74 is orifice coefficient, d = 0,04 m pipeline diameter, ρ fluid density calculated with eq. (5) in Δp 0 measured pressure drop through orifice Water velocity on the inlet and outlet of the pump V c 1 * c * (8) A Where A is cross sectional area of the pipe of the value 0, m Total head Total head of single pump is pressure difference in different form that should be made by centrifugal pump, to transport water of specific volume flow in given system from start to end point. General equation of total head for centrifugal pump is: p p1 H 1 g II I ploss 1 1* * g g 1 z z c c c c III IV (7) Centrifugal pumps - charactersistics Page: 8 from 1

9 Parts of equation represent energy differences between points 1 and. These parts of equation can be also negative that means that energy difference (pressure, geodetically or speed difference) between starting and end point helps to push fluid through pipeline. Parts of equation represent: I Pressure difference II Height difference III Kinetic energy difference IV Pressure drop because local and linear losses * 1 * 1 Slika 6: Points in pipeline system At observed system point 1 is at pump inlet and point at pump outlet. That means that eq. part I pressure difference between these two points is used, height difference is (eq. part II) z z 1 = 0,048 m. Because water velocities in points 1 and are equal, the eq. part III is 0, eq. part IV can be neglected due to very small energy losses between points 1 and due pressure losses Power and efficiency At given total head theoretical power is: P t m g H (9) Because compression is not ideal (isentropic), the pump uses internal power for compression that is bigger than theoretical power due to internal efficiency. P P t i (10) n In the pump the part of power is used for mechanical losses. Therefore effective power has to be introduced that is larger than internal power due to mechanical efficiency. Pn Pe (11) η Electromotor also has electrical and mechanical losses and uses electrical power to overcome these loses. Therefore electrical power is larger than effective power. m The overall efficiency is P em Pe (1) η em Pt Pn Pe Pt η ηn ηe ηem (13) P P P P n e em em Centrifugal pumps - charactersistics Page: 9 from 1

10 total head total head Faculty of mechanical engineering Laboratory for Heat and Power In this case power of single pump is calculated with eq. (9) with the help of total head. Electrical power is measured with inverters. Overall efficiency is calculated with eq. (13). 4.. Serial and parallel mode of two centrifugal pumps If single pump is not able to give adequate total head or volume flow, two or more pumps can be connected in serial or parallel mode. In that case total head is calculated as in single mode: a) Pumps in serial mode: H KOMB H 1 H (14) b) Pumps in parallel mode: H KOMB H 1 H (15) In the case of two pumps in series mode total head is larger at constant volume flow and in the case of two pumps in parallel mode volume flow is larger at constant total head (figure 7). serial setup single pump parallel setup flowrate Figure 7: Single pump total head vs. total head of two pumps in parallel and series mode 4.3. Pipeline characteristics While the pump characteristic shows the pump ability to supply energy to fluid at different flow rates, the pipeline characteristic means the amount of energy (total head), which is required to transport certain amount of fluid through pipeline. Characteristic of the pipeline shows the dependence of the total head from the volume flow for specific pipeline at specific operating conditions (figure 8). The required total head, according to equation (4) consists of four parts/articles. Parts I and II are independent of volume flow, while part III and IV flowrate IV III II I Figure 8:Pipeline characteristics with marked proportions of articles in eq. (4) Centrifugal pumps - charactersistics Page: 10 from 1

11 total head Faculty of mechanical engineering Laboratory for Heat and Power pump pipeline A operational point Slika 9: Operating point and water volume flow regulation by variing pipeline characteristic(a) or pump characteristic (B) B flowrate are increasing by the square of fluid velocity or volume flow. When determining the characteristics of the pipeline the properties of the pipeline should not be changed, therefore we should not change the position of the red valve V, which regulate water volume flow. Different volume flows of water that is necessary to determine the characteristics of a pipeline in this case are achieved by varying the operating parameters and characteristics of the pump. This is achieved by varying the rotational speed of the pump. Pump with known characteristics in the pipeline system with specific characteristic will also be able to establish an operating point that is exactly specified by the intersection of the two characteristic curves (Fig. 9). If you want to change the water flow is necessary to change one of the characteristics. In this case the characteristic of the pipeline is usually changed by a valve that increases/decreases pressure loses in the pipeline, part IV of the equation (4). Characteristic of the pump is usually changed with the rotation speed of the pump. 5. Exercise instructions 5.1. Introduction Before measurements interface IFD 6 should be turned ON with red button, run the computer and appropriate software. Check if orifice coefficient is set to 0,74. Before putting pumps in operation, regulation valve V should be fully opened and valves V1, V, V3 in V4 closed. That set up enables pumps to be started with minimum load. After start blue valves should be properly set according to the case (single pump, pumps in serial or parallel mode). At the same time mode should be properly set also in the software (Mode). Before measurements check it out if new table is opened (button Next results), so data are not mixed with previous measurements. After measurements data should be saved in Excel file for further analysis. 5.. Experiments The exercise is divided in three parts and in every part pump and pipeline characteristic should be calculated in different operating conditions. Centrifugal pumps - charactersistics Page: 11 from 1

12 5..1. Characteristic of single pump With changing pressure losses with red regulating valve, determine pump characteristic in operation region of the pump from maximal to minimal water volume flow. According to maximal volume flow pick the gradient of volume flow change in the way that whole volume flow region is covered (approximately 10 points). Repeat measurements for rotational speeds of: a) 45 Hz b) 35 Hz c) 5 Hz Be careful that before every measurement rotational speed of the pump is constant. At low rotational speed rotational speed of the pump is increased during regulation valve closing. That happens because the load of the pump is decreased The characteristic of two pumps On the same way determine the characteristic of the two pumps in series or parallel mode at 45 Hz. With the help of blue valves set the system to appropriate mode, so pumps are working: d) parallel e) in series Pick the step that you will obtain 10 measuring points in whole operating region. Take into account that in parallel mode water volume flow is almost double as in serial or single Pipeline characteristic With blue valves the operation of one pump has to be set. The pipeline characteristic is obtained with rotational speed varying (with potentiometer on inverter). At maximal rotational speed (approx. 45 Hz) set the volume flow with red regulation valve to: f) 100 % g) 66 % h) 33 % and lower the rotational speed by 5 Hz to approx. 15 Hz Tasks 1. Set up the unit FM1 and make measurement according to instructions.. On the basis of results calculate total head, theoretical power and overall efficiency of the pump in all measured points. 3. Show results in graphical form. Centrifugal pumps - charactersistics Page: 1 from 1

### 9. Pumps (compressors & turbines) Partly based on Chapter 10 of the De Nevers textbook.

Lecture Notes CHE 31 Fluid Mechanics (Fall 010) 9. Pumps (compressors & turbines) Partly based on Chapter 10 of the De Nevers textbook. Basics (pressure head, efficiency, working point, stability) Pumps

### MECA-H-402: Turbomachinery course Axial compressors

MECA-H-40: Turbomachinery course Axial compressors Pr. Patrick Hendrick Aero-Thermo-Mecanics Year 013-014 Contents List of figures iii 1 Axial compressors 1 1.1 Introduction...............................

### Applied Fluid Mechanics

Applied Fluid Mechanics 1. The Nature of Fluid and the Study of Fluid Mechanics 2. Viscosity of Fluid 3. Pressure Measurement 4. Forces Due to Static Fluid 5. Buoyancy and Stability 6. Flow of Fluid and

### CHAPTER EIGHT P U M P I N G O F L I Q U I D S

CHAPTER EIGHT P U M P I N G O F L I Q U I D S Pupmps are devices for supplying energy or head to a flowing liquid in order to overcome head losses due to friction and also if necessary, to raise liquid

NLNG Course 017 Table of Contents 1 Introduction and Basic Principles... 1.1 Hydraulic Machines... 1.... 1.3 Pump Geometry... 1.4 Pump Blade Geometry...3 1.5 Diffusers...5 1.6 Pump Losses...6 1.7 Example

### FACULTY OF CHEMICAL & ENERGY ENGINEERING FLUID MECHANICS LABORATORY TITLE OF EXPERIMENT: MINOR LOSSES IN PIPE (E4)

FACULTY OF CHEMICAL & ENERGY ENGINEERING FLUID MECHANICS LABORATORY TITLE OF EXPERIMENT: MINOR LOSSES IN PIPE (E4) 1 1.0 Objectives The objective of this experiment is to calculate loss coefficient (K

### Chapter Four fluid flow mass, energy, Bernoulli and momentum

4-1Conservation of Mass Principle Consider a control volume of arbitrary shape, as shown in Fig (4-1). Figure (4-1): the differential control volume and differential control volume (Total mass entering

### Introduction to Fluid Machines, and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur

Introduction to Fluid Machines, and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur Lecture - 09 Introduction to Reaction Type of Hydraulic

### Chemical Engineering 3P04 Process Control Tutorial # 1 Learning goals

Chemical Engineering 3P04 Process Control Tutorial # 1 Learning goals 1. Sensor Principles with the flow sensor example 2. The typical manipulated variable: flow through a conduit Sensors: We need them

### Fig.8-1 Scheme of the fluidization column

8 Fluidization Lenka Schreiberová, Martin Kohout I Basic relations and definitions Fluidization is a process where the liquid flows in opposite direction the gravitation and creates a suspension together

### Introduction to Turbomachinery

1. Coordinate System Introduction to Turbomachinery Since there are stationary and rotating blades in turbomachines, they tend to form a cylindrical form, represented in three directions; 1. Axial 2. Radial

### Chapter Four Hydraulic Machines

Contents 1- Introduction. - Pumps. Chapter Four Hydraulic Machines (لفرع الميكانيك العام فقط ( Turbines. -3 4- Cavitation in hydraulic machines. 5- Examples. 6- Problems; sheet No. 4 (Pumps) 7- Problems;

### Exam 3. Feb 12, Problem 1 / 32 Problem 2 / 33 Problem 3 / 32 Total / 100

ROSE-HULMAN Institute of Technology Sophomore Engineering Curriculum ES201 Conservation & Accounting Principles Winter 2014-2015 Section [1 pt]: 01 (1 st period) Name [1 pt] 02 (2 nd period) CM [1 pt]

### CHAPTER 5 CONVECTIVE HEAT TRANSFER COEFFICIENT

62 CHAPTER 5 CONVECTIVE HEAT TRANSFER COEFFICIENT 5.1 INTRODUCTION The primary objective of this work is to investigate the convective heat transfer characteristics of silver/water nanofluid. In order

### Instruction Manual. Equipment for Engineering Education

Equipment for Engineering Education Instruction Manual HM15007 Bernoulli s Principle Demonstrator GUNT Gerätebau GmbH PO Box 1125 D-22881 Barsbüttel Germany Phone (040) 670854-0 Fax (040) 670854-42 Instruction

### Basic Fluid Mechanics

Basic Fluid Mechanics Chapter 5: Application of Bernoulli Equation 4/16/2018 C5: Application of Bernoulli Equation 1 5.1 Introduction In this chapter we will show that the equation of motion of a particle

### Chapter (6) Energy Equation and Its Applications

Chapter (6) Energy Equation and Its Applications Bernoulli Equation Bernoulli equation is one of the most useful equations in fluid mechanics and hydraulics. And it s a statement of the principle of conservation

### Piping Systems and Flow Analysis (Chapter 3)

Piping Systems and Flow Analysis (Chapter 3) 2 Learning Outcomes (Chapter 3) Losses in Piping Systems Major losses Minor losses Pipe Networks Pipes in series Pipes in parallel Manifolds and Distribution

### FLOW IN PIPES. Mark J McCready University of Notre Dame July 24, chemeprof.com

FLOW IN PIPES Mark J McCready University of Notre Dame July 24, 2017 OVERVIEW This lecture will provide the simplest framework to explain The three forces at that are important to fluid flow in pipes The

### CHME 302 CHEMICAL ENGINEERING LABOATORY-I EXPERIMENT 302-V FREE AND FORCED CONVECTION

CHME 302 CHEMICAL ENGINEERING LABOATORY-I EXPERIMENT 302-V FREE AND FORCED CONVECTION OBJECTIVE The objective of the experiment is to compare the heat transfer characteristics of free and forced convection.

### Department of Energy Fundamentals Handbook. THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW, Module 3 Fluid Flow

Department of Energy Fundamentals Handbook THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW, Module 3 REFERENCES REFERENCES Streeter, Victor L., Fluid Mechanics, 5th Edition, McGraw-Hill, New York, ISBN 07-062191-9.

### FE Exam Fluids Review October 23, Important Concepts

FE Exam Fluids Review October 3, 013 mportant Concepts Density, specific volume, specific weight, specific gravity (Water 1000 kg/m^3, Air 1. kg/m^3) Meaning & Symbols? Stress, Pressure, Viscosity; Meaning

### Chapter Four Hydraulic Machines

Contents 1- Introduction. 2- Pumps. Chapter Four Hydraulic Machines (لفرع الميكانيك العام فقط ( Turbines. -3 4- Cavitation in hydraulic machines. 5- Examples. 6- Problems; sheet No. 4 (Pumps) 7- Problems;

### Exam #2: Fluid Kinematics and Conservation Laws April 13, 2016, 7:00 p.m. 8:40 p.m. in CE 118

CVEN 311-501 (Socolofsky) Fluid Dynamics Exam #2: Fluid Kinematics and Conservation Laws April 13, 2016, 7:00 p.m. 8:40 p.m. in CE 118 Name: : UIN: : Instructions: Fill in your name and UIN in the space

### Theory of turbo machine Effect of Blade Configuration on Characteristics of Centrifugal machines. Unit 2 (Potters & Wiggert Sec

Theory of turbo machine Effect of Blade Configuration on Characteristics of Centrifugal machines Unit (Potters & Wiggert Sec. 1..1, &-607) Expression relating Q, H, P developed by Rotary machines Rotary

### Lesson 6 Review of fundamentals: Fluid flow

Lesson 6 Review of fundamentals: Fluid flow The specific objective of this lesson is to conduct a brief review of the fundamentals of fluid flow and present: A general equation for conservation of mass

### Electric Vehicle Performance Power and Efficiency

Electric Vehicle Performance Power and Efficiency 1 Assignment a) Examine measurement guide and electric vehicle (EV) arrangement. b) Drive the route according to teacher s instruction and download measured

### M E 320 Professor John M. Cimbala Lecture 23

M E 320 Professor John M. Cimbala Lecture 23 Today, we will: Discuss diffusers and do an example problem Begin discussing pumps, and how they are analyzed in pipe flow systems D. Diffusers 1. Introduction.

### FLOW MEASUREMENT IN PIPES EXPERIMENT

University of Leicester Engineering Department FLOW MEASUREMENT IN PIPES EXPERIMENT Page 1 FORMAL LABORATORY REPORT Name of the experiment: FLOW MEASUREMENT IN PIPES Author: Apollin nana chaazou Partner

### STABILITY CONSIDERATIONS A SIMPLIFIED APPROACH

Proceedings of the First Middle East Turbomachinery Symposium February 13-16, 2011, Doha, Qatar STABILITY CONSIDERATIONS A SIMPLIFIED APPROACH Urs Baumann Head of Calculation and Development MAN Diesel

### Water Circuit Lab. The pressure drop along a straight pipe segment can be calculated using the following set of equations:

Water Circuit Lab When a fluid flows in a conduit, there is friction between the flowing fluid and the pipe walls. The result of this friction is a net loss of energy in the flowing fluid. The fluid pressure

### Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science Electric Machines

Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.685 Electric Machines Problem Set 10 Issued November 11, 2013 Due November 20, 2013 Problem 1: Permanent

### Taylor Dispersion Created by Robert P. Hesketh, Chemical Engineering, Rowan University Fall 2005

Taylor Dispersion Created by Robert P. Hesketh, Chemical Engineering, Rowan University Fall 005 In this problem you will simulate a tubular reactor with fluid flowing in laminar flow. The governing equations

### Motion on a linear air track

Motion on a linear air track Introduction During the early part of the 17 th century, Galileo experimentally examined the concept of acceleration. One of his goals was to learn more about freely falling

### Laboratory work No 2: Calibration of Orifice Flow Meter

Laboratory work No : Calibration of Orifice Flow Meter 1. Objective Calibrate the orifice flow meter and draw the graphs p = f 1 (Q) and C d = f (Re ).. Necessary equipment 1. Orifice flow meter. Measuring

### Evaluation of pump characteristic from measurement of fast deceleration

EPJ Web of Conferences 92, 02022 (2015) DOI: 10.1051/ epjconf/ 20159202022 C Owned by the authors, published by EDP Sciences, 2015 Evaluation of pump characteristic from measurement of fast deceleration

### Design of Multistage Turbine

Turbomachinery Lecture Notes 7-9-4 Design of Multistage Turbine Damian Vogt Course MJ49 Nomenclature Subscripts Symbol Denotation Unit c Absolute velocity m/s c p Specific heat J/kgK h Enthalpy J/kg m&

### PUMP PERFORMANCE MEASUREMENTS Jacques Chaurette p. eng. April 2003

PUMP PERFORMANCE MEASUREMENTS Jacques Chaurette p. eng. www.lightmypump.com April 003 Synopsis This article examines how to take flow and pressure measurement and then calculate the total head of a pump

### COMPUTER AIDED DESIGN OF RADIAL TIPPED CENTRIFUGAL BLOWERS AND FANS

4 th International Conference on Mechanical Engineering, December 26-28, 21, Dhaka, Bangladesh/pp. IV 55-6 COMPUTER AIDED DESIGN OF RADIAL TIPPED CENTRIFUGAL BLOWERS AND FANS Nitin N. Vibhakar* and S.

### Lecture 24. Design of flow meters

Lecture 24 Design of flow meters Contents Exercise 1 Exercise 2 Exercise 3 Key Words: Fluid flow, Macroscopic Balance, Frictional Losses, Turbulent Flow, Venturimeter, Orifice Meter, Pitot Tube Exercise

### CENTRIFUGAL PUMP SELECTION, SIZING, AND INTERPRETATION OF PERFORMANCE CURVES

CENTRIFUGAL PUMP SELECTION, SIZING, AND INTERPRETATION OF PERFORMANCE CURVES 4.0 PUMP CLASSES Pumps may be classified in two general types, dynamic and positive displacement. Positive displacement pumps

### Turbulent Compressible Flow in a Slender Tube

Turbulent Compressible Flow in a Slender Tube Kurt O. Lund* 1, and Christine M. Lord 2 1 COMSOL Consultant, 2 Lord Engineering Corp. *Corresponding author: 135 Sixth Street, Del Mar, CA 92014, kurtlund@roadrunner.com

### HYDRAULIC TURBINES. Hydraulics and Hydraulic Machines

HYDRAULIC TURBINES Introduction: The device which converts h ydraulic energy into mechanical energy or vice versa is known as Hydraulic Machines. The h ydraulic machines which convert h ydraulic energy

### RECORD AND ANALYSE THE PRESSURE-ENTHALPY DIAGRAM FOR A COMPRESSION HEAT PUMP

Thermodynamics Heat cycles Heat Pump RECORD AND ANALYSE THE PRESSURE-ENTHALPY DIAGRAM FOR A COMPRESSION HEAT PUMP Demonstrate how an electric compression heat pump works Quantitatively investigate of the

### Experiment (4): Flow measurement

Experiment (4): Flow measurement Introduction: The flow measuring apparatus is used to familiarize the students with typical methods of flow measurement of an incompressible fluid and, at the same time

### Peristaltic Pump. Introduction. Model Definition

Peristaltic Pump Introduction In a peristaltic pump, rotating rollers are squeezing a flexible tube. As the pushed down rollers move along the tube, the fluid in the tube follows the motion. The main advantage

### 3 Energy Exchange in Turbomachines

3 Energy Exchange in Turbomachines Problem 1 The solved and unsolved examples of this chapter are meant to illustrate the various forms of velocity triangles and the variety of the turbomachines. In addition,

### Prof. Dr.-Ing. F.-K. Benra. ISE batchelor course

University Duisburg-Essen Campus Duisburg Faculty of engineering Science Department of Mechanical Engineering Examination: Fluid Machines Examiner: Prof. Dr.-Ing. F.-K. Benra Date of examination: 06.03.2006

### ENERGY TRANSFER BETWEEN FLUID AND ROTOR. Dr. Ir. Harinaldi, M.Eng Mechanical Engineering Department Faculty of Engineering University of Indonesia

ENERGY TRANSFER BETWEEN FLUID AND ROTOR Dr. Ir. Harinaldi, M.Eng Mechanical Engineering Department Faculty of Engineering University of Indonesia Basic Laws and Equations Continuity Equation m m ρ mass

### INSTRUCTIONS FOR LABORATORY EXPERIMENT IN FLUID MECHANICS

INSTRUCTIONS FOR LABORATORY EXPERIMENT IN FLUID MECHANICS VT2010 Pipe Flow: General Information: Attendance at the laboratory experiment is required for completion of the course. The experiments will be

### Laboratory exercise 1: Open channel flow measurement

Chapter 1 Laboratory exercise 1: Open channel flow measurement Laboratory exercise Open channel flow measurement is placed on the Faculty of Civil and Geodetic Engineering, on Department of Environmental

### Design of Monoblock Centrifugal Pump Impeller

Design of Monoblock Centrifugal Pump Impeller Authors Mr. Chetan Kallappa Tambake 1, Prof. P. V. Salunke 1 Department of Mechanical Engineering, Walchand Institute of Technology, Ashok Chowk, Solapur-413006,

### Understand How Valves & Fittings Affect Head Loss

Understand How Valves & Fittings Affect Head Loss by Ray Hardee (Engineered Software, Inc.) This column discusses valves and fittings and evaluates how these devices affect the operation of piping systems.

### Prof. Dr.-Ing. F.-K. Benra. ISE Bachelor Course

University Duisburg-Essen Campus Duisburg Faculty of Engineering Science Examination: Fluid Machines Examiner: Prof. Dr.-Ing. F.-K. Benra Date of examination: 07.08.2006 Handling time: 120 Minutes ISE

### Getting started with BatchReactor Example : Simulation of the Chlorotoluene chlorination

Getting started with BatchReactor Example : Simulation of the Chlorotoluene chlorination 2011 ProSim S.A. All rights reserved. Introduction This document presents the different steps to follow in order

### Chapter 5: Mass, Bernoulli, and Energy Equations

Chapter 5: Mass, Bernoulli, and Energy Equations Introduction This chapter deals with 3 equations commonly used in fluid mechanics The mass equation is an expression of the conservation of mass principle.

### STATIC AND DYNAMIC ANALYSIS OF A PUMP IMPELLER WITH A BALANCING DEVICE PART I: STATIC ANALYSIS

Int. J. of Applied Mechanics and Engineering, 04, vol.9, No.3, pp.609-69 DOI: 0.478/ijame-04-004 STATIC AND DYNAMIC ANALYSIS OF A PUMP IMPELLER WITH A BALANCING DEVICE PART I: STATIC ANALYSIS C. KUNDERA

### Specific Static rotor work ( P P )

The specific Static Rotor ork p 1 ρ Specific Static rotor work ( P P ) here P, P static pressures at points, (P P ) static pressure difference of the rotor ρ density, in case of a compressible medium average

### Sudden Expansion Exercise

Sudden Expansion Exercise EAS 361, Fall 2009 Before coming to the lab, read sections 1 through 4 of this document. Engineering of Everyday Things Gerald Recktenwald Portland State University gerry@me.pdx.edu

### Hydraulic (Fluid) Systems

Hydraulic (Fluid) Systems Basic Modeling Elements Resistance apacitance Inertance Pressure and Flow Sources Interconnection Relationships ompatibility Law ontinuity Law Derive Input/Output Models ME375

### Turbine Meter TRZ 03 PRODUCT INFORMATION. Reliable Measurement of Gas

Turbine Meter TRZ 0 PRODUCT INFORMATION Reliable Measurement of Gas TURBINE METER TRZ 0 Method of operation, Construction Method of operation The TRZ 0 turbine meter is a flow meter suitable for gas measurement

### Fluid Mechanics II 3 credit hour. Fluid flow through pipes-minor losses

COURSE NUMBER: ME 323 Fluid Mechanics II 3 credit hour Fluid flow through pipes-minor losses Course teacher Dr. M. Mahbubur Razzaque Professor Department of Mechanical Engineering BUET 1 Losses in Noncircular

### ME 309 Fluid Mechanics Fall 2010 Exam 2 1A. 1B.

Fall 010 Exam 1A. 1B. Fall 010 Exam 1C. Water is flowing through a 180º bend. The inner and outer radii of the bend are 0.75 and 1.5 m, respectively. The velocity profile is approximated as C/r where C

### M E 320 Professor John M. Cimbala Lecture 24

M E 30 Professor John M. Cimbala Lecture 4 Today, we will: Discuss pump performance curves Discuss how to match a pump and a piping system, and do some example problems. Pump Performance a. Pump performance

### FLUID MECHANICS D203 SAE SOLUTIONS TUTORIAL 2 APPLICATIONS OF BERNOULLI SELF ASSESSMENT EXERCISE 1

FLUID MECHANICS D203 SAE SOLUTIONS TUTORIAL 2 APPLICATIONS OF BERNOULLI SELF ASSESSMENT EXERCISE 1 1. A pipe 100 mm bore diameter carries oil of density 900 kg/m3 at a rate of 4 kg/s. The pipe reduces

### Comparison of discharge measurements - Thermodynamic to US Clamp- On, stationary US and Needle Opening Curve

IGHEM 2012 The 9 th International conference on hydraulic efficiency measurements Trondheim, Norway June 27 th - 30 th, 2012 XXXXXX Comparison of discharge measurements - Thermodynamic to US Clamp- On,

### FE Fluids Review March 23, 2012 Steve Burian (Civil & Environmental Engineering)

Topic: Fluid Properties 1. If 6 m 3 of oil weighs 47 kn, calculate its specific weight, density, and specific gravity. 2. 10.0 L of an incompressible liquid exert a force of 20 N at the earth s surface.

### mywbut.com Hydraulic Turbines

Hydraulic Turbines Hydro-electric power accounts for up to 0% of the world s electrical generation. Hydraulic turbines come in a variety of shapes determined by the available head and a number of sizes

### Circular Motion and Centripetal Force

[For International Campus Lab ONLY] Objective Measure the centripetal force with the radius, mass, and speed of a particle in uniform circular motion. Theory ----------------------------- Reference --------------------------

### Energy. This provides a practical measure of the usefulness of a machine. The useful energy transfer in a generator can be represented by:

Sensors: Loggers: Voltage, Current, Motion Any EASYSENSE Physics Logging time: 10 seconds 44a Efficiency of an electric generator Read Machines use energy transfers to achieve a useful job of work. No

### Hydraulic Design Of Polyethylene Pipes

Hydraulic Design Of Polyethylene Pipes Waters & Farr polyethylene pipes offer a hydraulically smooth bore that provides excellent flow characteristics. Other advantages of Waters & Farr polyethylene pipes,

Ventilation 5 Fans Vladimír Zmrhal (room no. 814) http://users.fs.cvut.cz/~zmrhavla/index.htm Dpt. Of Environmental Engineering 1 Introduction Fans air pump that creates a pressure difference and causes

### Lecture 3 The energy equation

Lecture 3 The energy equation Dr Tim Gough: t.gough@bradford.ac.uk General information Lab groups now assigned Timetable up to week 6 published Is there anyone not yet on the list? Week 3 Week 4 Week 5

### Hydraulics. B.E. (Civil), Year/Part: II/II. Tutorial solutions: Pipe flow. Tutorial 1

Hydraulics B.E. (Civil), Year/Part: II/II Tutorial solutions: Pipe flow Tutorial 1 -by Dr. K.N. Dulal Laminar flow 1. A pipe 200mm in diameter and 20km long conveys oil of density 900 kg/m 3 and viscosity

### 405 Compact Orifice Series and 1595 Conditioning Orifice Plate Flow Test Data Book and Flow Handbook

405 Compact Orifice Series and 1595 Conditioning Orifice Plate Flow Test Book and Flow Handbook www.rosemount.com 405 Compact Orifice Series and 1595 Conditioning Orifice Plate Flow Test Book NOTICE Read

### ME332 FLUID MECHANICS LABORATORY (PART II)

ME332 FLUID MECHANICS LABORATORY (PART II) Mihir Sen Department of Aerospace and Mechanical Engineering University of Notre Dame Notre Dame, IN 46556 Version: April 2, 2002 Contents Unit 5: Momentum transfer

### DRS 61: Incremental encoders, number of lines and zero pulse width freely programmable DRS 60: Incremental Encoders with Zero-Pulse-Teach

NEW DRS : Incremental encoders, number of lines and zero pulse width freely programmable DRS : s with Zero-Pulse-Teach Further highlights of this generation of encoders: Simple zero-pulse-teach by pressing

### ME 316: Thermofluids Laboratory

ME 316 Thermofluid Laboratory 6.1 KING FAHD UNIVERSITY OF PETROLEUM & MINERALS ME 316: Thermofluids Laboratory PELTON IMPULSE TURBINE 1) OBJECTIVES a) To introduce the operational principle of an impulse

### WATER DISTRIBUTION NETWORKS

WATER DISTRIBUTION NETWORKS CE 370 1 Components of Water Supply System 2 1 Water Distribution System Water distribution systems are designed to adequately satisfy the water requirements for a combinations

### Chapter 5. Mass and Energy Analysis of Control Volumes

Chapter 5 Mass and Energy Analysis of Control Volumes Conservation Principles for Control volumes The conservation of mass and the conservation of energy principles for open systems (or control volumes)

### Pascal ET is an handheld multifunction calibrator for the measurement and simulation of the following parameters: - pressure

DATASHEET Pascal ET Pascal ET is an handheld multifunction calibrator for the measurement and simulation of the following parameters: - pressure - electrical signals (ma, mv, V, ) - temperature (TC and

### Laboratory Notes Heat and Power Division Royal Institute of Technology Stockholm, Sweden

Laboratory Notes Determination of Losses in a Linear Cascade (approx. hours laboratory exercise) Blades Stepper motor for moving the probes By Navarathna N. and Wei N. Division of Heat and Power Technology

### Innovative Solutions from the Process Control Professionals

Control Station Innovative Solutions from the Process Control Professionals Software For Process Control Analysis, Tuning & Training Control Station Software For Process Control Analysis, Tuning & Training

### V/ t = 0 p/ t = 0 ρ/ t = 0. V/ s = 0 p/ s = 0 ρ/ s = 0

UNIT III FLOW THROUGH PIPES 1. List the types of fluid flow. Steady and unsteady flow Uniform and non-uniform flow Laminar and Turbulent flow Compressible and incompressible flow Rotational and ir-rotational

### 17-Nov-2015 PHYS MAXWELL WHEEL. To test the conservation of energy in a system with gravitational, translational and rotational energies.

Objective MAXWELL WHEEL To test the conservation of energy in a system with gravitational, translational and rotational energies. Introduction A wheel is suspended by two cords wrapped on its axis. After

### The Mechatronics Design for Measuring Fluid Friction Losses in Pipe Flows Rıza Gurbuz

Solid State Phenomena Vol. 113 (2006) pp 603-608 Online available since 2006/Jun/15 at www.scientific.net (2006) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/ssp.113.603 The Mechatronics

### Vacuum Kelvin Force Probe Research Richard Williams August 1st 2008

Vacuum Kelvin Force Probe Research Richard Williams August 1st 2008 Introduction Kelvin Force Probe Microscopy is an analytical method to measure the contact potential difference between a reference material

### Introduction to Fluid Machines and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur

Introduction to Fluid Machines and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur Lecture - 21 Centrifugal Compressor Part I Good morning

### Laboratory Exercise M-2 Power measurements

SILESIAN UNIVERSITY OF TECHNOLOGY FACULTY OF ENERGY AND ENVIRONMENTAL ENGINEERING INSTITUTE OF POWER ENGINEERING AND TURBOMACHINERY INSTRUCTIONS to Measurements of energetic quantities (Pomiary wielkości

### INTERNATIONAL JOURNAL OF ADVANCED RESEARCH IN ENGINEERING AND TECHNOLOGY (IJARET)

INTERNATIONAL JOURNAL OF ADVANCED RESEARCH IN ENGINEERING AND TECHNOLOGY (IJARET) International Journal of Advanced Research in Engineering and Technology (IJARET), ISSN 0976 ISSN 0976-6480 (Print) ISSN

### Laboratory Notes. Turbomachinery

Brussels School of Engineering École polytechnique de Bruxelles Academic Year 2016-2017 Laboratory Notes Turbomachinery Aero-Thermo-Mechanics Department Teaching Assistants : Laurent Ippoliti Joëlle Vincké

### ES201 - Examination III Richards, North, Berry Fall November 2000 NAME BOX NUMBER

ES201 - Examination III Richards, North, Berry Fall 2000-2001 2 November 2000 NAME BOX NUMBER Problem 1 Problem 2 ( 30 ) ( 30 ) Problem 3 ( 40 ) Total ( 100 ) INSTRUCTIONS Closed book/notes exam. (Unit

### Appendix A Prototypes Models

Appendix A Prototypes Models This appendix describes the model of the prototypes used in Chap. 3. These mathematical models can also be found in the Student Handout by Quanser. A.1 The QUANSER SRV-02 Setup

### Rate of Flow Quantity of fluid passing through any section (area) per unit time

Kinematics of Fluid Flow Kinematics is the science which deals with study of motion of liquids without considering the forces causing the motion. Rate of Flow Quantity of fluid passing through any section

### 5 ENERGY EQUATION OF FLUID MOTION

5 ENERGY EQUATION OF FLUID MOTION 5.1 Introduction In order to develop the equations that describe a flow, it is assumed that fluids are subject to certain fundamental laws of physics. The pertinent laws

### 2 Internal Fluid Flow

Internal Fluid Flow.1 Definitions Fluid Dynamics The study of fluids in motion. Static Pressure The pressure at a given point exerted by the static head of the fluid present directly above that point.

### Preparations and Starting the program

Preparations and Starting the program https://oldwww.abo.fi/fakultet/ookforskning 1) Create a working directory on your computer for your Chemkin work, and 2) download kinetic mechanism files AAUmech.inp

### Department of Civil and Environmental Engineering CVNG 1001: Mechanics of Fluids

INTRODUCTION Hydrodynamic Machines A hydromachine is a device used either for extracting energy from a fluid or to add energy to a fluid. There are many types of hydromachines and Figure 1 below illustrates