Stall & Parallel Operation. Witt&Sohn AG Oct-14
|
|
|
- Brianne Charles
- 5 years ago
- Views:
Transcription
1 Stall & Parallel Operation
2 CONTENT Stall & Parallel Operation 1. Definition of Stall 2. Requirements for Parallel Operation 3. Operation of Parallel Fans 4. Stall-free Fans & VSD 2
3 Definition of Stall, Stall Definition Stall means: status of non-uniform flows, two air flows at one pressure value, Typical Axial Fan Curve, Single Operation: Stall area: forbidden for operation. Operation range 3
4 Definition of Stall, Stall Definition Stall means, status of non-uniform flow, two air flows at one pressure value, Typical Axial Fan Curve (2 Fans Parallel Operation) Stall area: forbidden for operation. Operation range 4
5 Definition of Stall Stall means, status of non-uniform flow, two air flows at one pressure value, Typical Axial Fan Curve (4 Fans Parallel Operation) Stall area: forbidden for operation. Operation range The more fans run in parallel the larger the stall area the smaller the operation range The STALL zone for axial fans in parallel often is much larger than expected! 5
6 Definition of Stall Disturbance causes the air flow to separate from one or more of the blades. This blocks the air flow through the corresponding blade cell. 6
7 Definition of Stall Curve of one fan Summary curve of two fans Max. allowed system resistance without any saftey margin Several fan suppliers do not show or do not know in detail the STALL area of their fan curves Stall area of one fan Stall area of two fans (summary curve) pd-line Always ask for fan curves starting at 0m³/s! 7
8 Definition of Stall Possible Consequences: - rupture of air stream lines at blade edge - high vibrations with low amplitude at blade - damage of bearings - fatigue break of impeller 8
9 Definition of Stall Reasons: Turbulent inlet or outlet flow at the fan System resistance too high because of unexpected aerodynamic behaviour (wrong system design) Short-term pressure pulses (due to Piston Effect of by-passing trains) 9
10 Piston Effect Axial Fans (none stall-free) Stall operation likely for none stall-free fans due to piston effect of by-passing trains (Metro/Railway application) Piston effect stall! +610Pa - 610Pa 10
11 Piston Effect Axial Fans (none stall-free) Stall operation likely for none stall-free fans due to piston effect of by-passing trains (Metro/Railway application) Piston effect stall! +610Pa - 610Pa 11
12 Detection of stall Stall detection probe by WITT&SOHN Stall detection is done by a Petermann probe in combination with a pressure sensor Probe located radially in the area of blade tip During normal (stable) operation the probe detects a negative or no pressure difference. - + Stall is detected if the pressure difference exceeds a predefined value NOTE: A stall detection probe does not eliminate the stall area of the fan. It only detects that the fan is not running in a stable area. Operation of fans in such conditions shall be avoided! 12
13 CONTENT Stall & Parallel Operation 1. Definition of Stall 2. Requirements for Parallel Operation 3. Operation of Parallel Fans 4. Stall-free Fans & VSD 13
14 Requirements for Parallel Operation For System: High volume flow (Q design > Q single fan ) Moderate pressure drop Restricted space Heat resistance Reversibility (up to 100%) Cost-effective solution Robust design 14
15 Requirements for Parallel Operation For Fan Maker: None stall-free fan curve with shown stall area Cumulative fan curve of parallel fans INFO: Most fan makers do not know/ show the STALL area characteristic of their fans! (stall control impossible) 15
16 Requirements for Parallel Operation For Fan Maker: None stall-free fan curve with shown stall area Cumulative fan curve of parallel fans or Stall-free fan curve 16
17 CONTENT Stall & Parallel Operation 1. Definition of Stall 2. Requirements for Parallel Operation 3. Operation of Parallel Fans 4. Stall-free Fans & VSD 17
18 Operation of Parallel Fans Installation: Keep distance between fans to prevent disturbance and interference of fans Bad Good 18
19 Operation of Parallel Fans Installation: Connect to plenum with separation walls Ensure symmetric openings Use shut-off dampers at one side Bad asymmetric opening symmetric openings Good short circuit separation of flow wall 19
20 Operation of Parallel Fans Installation - Samples: 20
21 Operation of Parallel Fans Parallel Fan Operation I. Start in cascade (DOL, weak supply net) synchronize fan start with opening of damper 1. ensure all dampers are initially closed 2. start-up 1 st fan 3. wait for signals 1 st fan: full speed and 1 st damper: open 4. start-up next fan (step 2. to 4.) stop procedure with any notice of failure But: 21
22 Operation of Parallel Fans Problem: Switch on an additional fan might lead to Asymmetry of individual air flow Moving of duty point of remaining fans into stall area Uncontrollable pulsing of system System performance problems Fan damage 22
23 Operation of Parallel Fans Parallel Fan Operation II. Start in parallel (DOL, strong supply net) synchronize fan start with opening of damper 1. ensure all dampers are initially closed 2. start-up all fans simultaneously 3. wait for signals all fans: full speed and all dampers: open stop procedure with any notice of failure But difficult to achieve Requires strong supply net 23
24 Operation of Parallel Fans Parallel Fan Operation III. Start-up in parallel (VSD) synchronize fan start with opening of damper 1. ensure all dampers are initially closed 2. start-up all fans simultaneously: use 1 st VSD as master, others as slave (AO master : actual speed AI slave : speed set point) 3. wait for signals all fans: full speed and all dampers: open stop procedure with any notice of failure But expensive 24
25 CONTENT Stall & Parallel Operation 1. Definition of Stall 2. Requirements for Parallel Operation 3. Operation of Parallel Fans 4. Stall-free Fans & VSD 25
26 Stall-free Fans & VSD Stall-free fans by WITT&SOHN : 1. Fans with truly STALL-free fan curve No limitation during parallel duty (trouble free) Max. stability against pressure pulses 26
27 Stall-free Fans & VSD Stall-free fans by WITT&SOHN : 2. Fans with Anti-Stall Device and quasi STALL-free fan curve Anti-Stall Device Still limitation during parallel duty: Anti-stall device reduces effect of stall, but continuous operation in stabilized area not recommended High stability against pressure pulses Provides a significant higher level of reliability of the ventilation system Parallel operation (trouble-free) 27
28 Stall-free Fans & VSD Stall-free fans by WITT&SOHN : 3. Fans with STALL-free fan curve and VSD Multiple duty points achievable with one blade angle Constantly high efficiencies No complex pitch-in-motion impellers required 28
29 Summary Axial flow fans should not be operated in STALL or in the stabilized STALL area Piston effects have to be taken into account Stall can be detected by a Petermann probe Parallel duty is restricting the operation range of fans with none stall-free characteristics For parallel duty it is required to know the characteristic of the stall area The plant layout should be symmetrically designed Fan isolation dampers have to be installed for parallel duty With stall free fans curves parallel duty is no problem anymore 29
Higher Gas Turbine Operation Flexibility by Improved Diffuser Vanes of a Radial Compressor
Higher Gas Turbine Operation Flexibility by Improved Diffuser Vanes of a Radial Compressor STAR EUROPEAN CONFERENCE 2011 23 March 2011 Amsterdam, The Netherlands Dipl.-Ing. Anis Haj Ayed GmbH, Aachen,
Ermenek Dam and HEPP: Spillway Test & 3D Numeric-Hydraulic Analysis of Jet Collision
Ermenek Dam and HEPP: Spillway Test & 3D Numeric-Hydraulic Analysis of Jet Collision J.Linortner & R.Faber Pöyry Energy GmbH, Turkey-Austria E.Üzücek & T.Dinçergök General Directorate of State Hydraulic
Casing wall static pressure distribution behavior in a centrifugal compressor with asymmetric inlet/outlet structures
Original Article Casing wall static pressure distribution behavior in a centrifugal compressor with asymmetric inlet/outlet structures Proc IMechE Part A: J Power and Energy 2019, Vol. 233(1 37 51! IMechE
ENGINEERING AUSTRALIA PTY. LTD.
POWERTECH ENGINEERING AUSTRALIA PTY. LTD. 15 Lorikeet Street, Terrigal NSW 2260 AUSTRALIA. ACN 102 392 558 Phone: (61) 02 4384 6000. Fax: (61) 02 4384 6200. ABN 63 102 392 558 Email: powerteche@bigpond.com
Research on Small Wind Power System Based on H-type Vertical Wind Turbine Rong-Qiang GUAN a, Jing YU b
06 International Conference on Mechanics Design, Manufacturing and Automation (MDM 06) ISBN: 978--60595-354-0 Research on Small Wind Power System Based on H-type Vertical Wind Turbine Rong-Qiang GUAN a,
Wind Turbine Noise Emission Customised Solutions for French Legislation
Wind Turbine Noise Emission Customised Solutions for French Legislation Énergie éolienne et innovation : quelles solutions face aux exigences techniques, réglementaires et environnementales? MEDDTL le
Redesign of Centrifugal PLACE FOR Compressor TITLE. Impeller by means of Scalloping
Redesign of Centrifugal PLACE FOR Compressor TITLE AUTHORS Impeller by means of Scalloping Kirill Grebinnyk, Aerodynamics Engineer, Sulzer (USA) Rob Widders, Engineering Manager, BOC (Australia) Kirill
The Criticality of Cooling
Reliability Solutions White Paper January 2016 The Criticality of Cooling Utilities, power plants, and manufacturing facilities all make use of cooling towers for critical heat transfer needs. By cycling
FLOW CONSIDERATIONS IN INDUSTRIAL SILENCER DESIGN
FLOW CONSIDERATIONS IN INDUSTRIAL SILENCER DESIGN George Feng, Kinetics Noise Control, Inc., 3570 Nashua Drive, Mississauga, Ontario Vadim Akishin, Kinetics Noise Control, Inc., 3570 Nashua Drive, Mississauga,
MECHANICAL EQUIPMENTS: COMPRESSORS, PUMPS, SEALS, SPEED DRIVES, CONTROL VALVES & ACTUATORS & SAFETY RELIEF VALVES
Training Title MECHANICAL EQUIPMENTS: COMPRESSORS, PUMPS, SEALS, SPEED DRIVES, CONTROL VALVES & ACTUATORS & SAFETY RELIEF VALVES Training Duration 5 days Training Venue and Dates REF Mechanical Equipments:
New Technologies applied to the design and optimization of tunnel ventilation systems
New Technologies applied to the design and optimization of tunnel ventilation systems Ing. Justo Suárez Area Manager - ZITRON Dot. Ing. Massimiliano Bringiotti Managing Director - GEOTUNNEL Ing. Ana Belén
VISIMIX TURBULENT. MECHANICAL CALCULATIONS OF A CONSOLE SHAFT
VISIMIX TURBULENT. MECHANICAL CALCULATIONS OF A CONSOLE SHAFT This example shows how to perform mechanical calculations required to check the shaft reliability, including mechanical strength and vibration
Compressors. Basic Classification and design overview
Compressors Basic Classification and design overview What are compressors? Compressors are mechanical devices that compresses gases. It is widely used in industries and has various applications How they
Turbo Blowers. Combustion Excellence Since Features. Benefits
Turbo Blowers Features Integral molded scroll design Turbine bladed impeller Steel inlet guard Precisely balanced impellers eliminate vibration Complete line of available accessories for adapting to any
USER MANUAL. JET TST and JET TST S.
USER MANUAL JET TST and JET TST S www.sisteven.com Types of Jet fans: JET TST UNI: Impulse axial fan single direction JET TST S UNI: Impulse axial fan single direction (short case) JET TST REV: Impulse
Effect of Inlet Clearance Gap on the Performance of an Industrial Centrifugal Blower with Parallel Wall Volute
International Journal of Fluid Machinery and Systems DOI: http://dx.doi.org/10.5293/ijfms.2013.6.3.113 Vol. 6, No. 3, July-September 2013 ISSN (Online): 1882-9554 Original Paper (Invited) Effect of Inlet
VISIMIX LAMINAR. BLENDING OF NON-NEWTONIAN LIQUID. POWER. CIRCULATION. MIXING TIME.
VISIMIX LAMINAR. BLENDING OF NON-NEWTONIAN LIQUID. POWER. CIRCULATION. MIXING TIME. Subject of the example application of program VisiMix Laminar for analysis and improvement of process characteristics
青岛宝通进出口贸易有限公司. Wind Products List and Introductions
Wind Products List and Introductions 400W Wind Turbine e 1.1 400W diffuse wind turbine technical parameters Blade material & quality Reinforced fiber glass*8 Wind rotor diameter (m) 1.25 Rated power/maximum
METRO System Design. Witt&Sohn AG Aug-11
METRO System Design Content Purpose Comparison Metro Road tunnel Ventilation Types/ Systems Operation Modes Pre-/ Detailed Design Summary Purpose Presentation: Degree of Complexity of Metro Systems No
THEORETICAL EVALUATION OF FLOW THROUGH CENTRIFUGAL COMPRESSOR STAGE
THEORETICAL EVALUATION OF FLOW THROUGH CENTRIFUGAL COMPRESSOR STAGE S.Ramamurthy 1, R.Rajendran 1, R. S. Dileep Kumar 2 1 Scientist, Propulsion Division, National Aerospace Laboratories, Bangalore-560017,ramamurthy_srm@yahoo.com
A COMPARATIVE STUDY OF MIX FLOW PUMP IMPELLER CFD ANALYSIS AND EXPERIMENTAL DATA OF SUBMERSIBLE PUMP
IMPACT: International Journal of Research in Engineering & Technology (IMPACT: IJRET) ISSN 2321-8843 Vol. 1, Issue 3, Aug 2013, 57-64 Impact Journals A COMPARATIVE STUDY OF MIX FLOW PUMP IMPELLER CFD ANALYSIS
7 CARGO AND BALLAST PUMPS 7.1 PUMP THEORY AND CHARACTERISTICS
7 CARGO AND BALLAST PUMPS Learning objectives -that the suction action of a pump is really atmospheric pressurepushing the liquid into the inlet side of the pump -how low vapor pressure of the liquid being
Fan and air movement essentials
1 Properties of air For the purposes of this section we will assume that it is air that will be moved by the various types of fans. The air we breathe is made up of a mixture of gasses - nitrogen 78%,
Design. Pompetravaini-NSB API SB Liquid Ring Compressor for Gas Processing. Working Principle
SB Pompetravaini-NSB API SB Liquid Ring Compressor for Gas Processing A family of API liquid ring compressors has been developed and has been in the market for nearly a decade, they are specifically made
Control Strategies for operation of pitch regulated turbines above cut-out wind speeds
Control Strategies for operation of pitch regulated turbines above cut-out wind speeds Helen Markou 1 Denmark and Torben J. Larsen, Risø-DTU, P.O.box 49, DK-4000 Roskilde, Abstract The importance of continuing
Aeroelasticity of Turbomachines
MUSAF II Colloquium, Toulouse, France Aeroelasticity of Turbomachines Damian Vogt, formerly KTH (now University of Stuttgart) Torsten Fransson, KTH 2013-09-18 (Giles, 1991) 2 Content of Today s Talk Crash
The Usage of Propeller Tunnels For Higher Efficiency and Lower Vibration. M. Burak Şamşul
The Usage of Propeller Tunnels For Higher Efficiency and Lower Vibration M. Burak Şamşul ITU AYOC 2014 - Milper Pervane Teknolojileri Company Profile MILPER is established in 2011 as a Research and Development
Compressor Seal Replacement and Upgrades SERVICES
Compressor Seal Replacement and Upgrades SERVICES Compressor Seal Upgrades An Elliott Group compressor seal upgrade increases seal reliability and reduces process gas leakage to improve overall efficiency.
SUBPART C - STRUCTURE
SUBPART C - STRUCTURE GENERAL CS 23.301 Loads (a) Strength requirements are specified in terms of limit loads (the maximum loads to be expected in service) and ultimate loads (limit loads multiplied by
FUNDAMENTAL SAFETY OVERVIEW VOLUME 2: DESIGN AND SAFETY CHAPTER I: AUXILIARY SYSTEMS. A high-capacity EBA system [CSVS] [main purge]
![FUNDAMENTAL SAFETY OVERVIEW VOLUME 2: DESIGN AND SAFETY CHAPTER I: AUXILIARY SYSTEMS. A high-capacity EBA system [CSVS] [main purge]](/thumbs/88/117664573.jpg "FUNDAMENTAL SAFETY OVERVIEW VOLUME 2: DESIGN AND SAFETY CHAPTER I: AUXILIARY SYSTEMS. A high-capacity EBA system [CSVS] [main purge]")
PAGE : 1 / 9 5. CONTAINMENT PURGE (EBA [CSVS]) The Reactor Building purge system comprises the following: A high-capacity EBA system [CSVS] [main purge] A low-capacity EBA system [CSVS] [mini-purge] 5.1.
A Characterization of Rotating Stall Behaviors in High and Low Speed Centrifugal Compressors
Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 1998 A Characterization of Rotating Stall Behaviors in High and Low Speed Centrifugal Compressors W. C. Oakes
Structure of Mechanically Agitated Gas-Liquid Contactors
Structure of Mechanically Agitated Gas-Liquid Contactors 5 2 Structure of Mechanically Agitated Gas-Liquid Contactors 2.1 The vessel geometry The most commonly adopted geometry of a stirred gas-liquid
CHAPTER 9 PROPELLERS
CHAPTER 9 CHAPTER 9 PROPELLERS CONTENTS PAGE How Lift is Generated 02 Helix Angle 04 Blade Angle of Attack and Helix Angle Changes 06 Variable Blade Angle Mechanism 08 Blade Angles 10 Blade Twist 12 PROPELLERS
Waves and Sound. Honors Physics
Waves and Sound Honors Physics Simple Harmonic Motion Refers to repetitive, cyclical motion (like a pendulum or waves) Can be described with sine curve For a pendulum only T 2 L g Example problem The world
Small Scale Wind Technologies Part 2. Centre for Renewable Energy at Dundalk IT CREDIT
Small Scale Wind Technologies Part 2 Centre for Renewable Energy at Dundalk IT CREDIT 1 Part 2 Small and large scale wind turbine technologies 2 Overview of small scale grid connected system Wind Turbine
AXIAL FLOW FANS GENERAL INFORMATION
ELTA IMPELLER RANGE AXIAL INTRODUTION TEST STANDARDS The Elta impeller ranges included in this catalogue have harnessed the latest technology in axial impeller design, resulting in enhanced pressure development,
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
Consider the design of a central chilled water cooling system for a clubhouse and
EXAMPLE CD10-1 Consider the design of a central chilled water cooling system for a clubhouse and residential lodges for a prestigious golf club. The clubhouse is large with a 75 ton cooling load. It is
Vibration-Free Joule-Thomson Cryocoolers for Distributed Microcooling
Vibration-Free Joule-Thomson Cryocoolers for Distributed Microcooling W. Chen, M. Zagarola Creare Inc. Hanover, NH, USA ABSTRACT This paper reports on an innovative concept for a space-borne Joule-Thomson
BULLETIN FA-300. February 1999 AXIAD II. Adjustable Pitch Airfoil Axial Flow Fan
BULLETIN FA-300 February 1999 AXIAD II Adjustable Pitch Airfoil Axial Flow Fan AXIAD II The axial flow fan with: High efficiency Low sound level Adjustable pitch blades Complete range of accessories Axial
The System Curve, the Fan Curve, and the Operating Point
The System Curve, the Fan Curve, and the Operating Point AIHA-RMS Sept. 12, 2018 Keith D. Robinson, P.E. Overall Objective To equip an Industrial Hygienist with the skills necessary to document the performance
Variable Displacement Double Pump A20VO. Series 1, for open circuits Axial piston - swashplate design, Back to back - design
Brueninghaus Hydromatik Series 1, for open circuits Axial piston - swashplate design, Back to back - design RE 93100/02.97 Sizes 60...260 Nominal Pressure up to 350 bar Peak Pressure up to 400 bar Preliminary
DEVELOPMENT OF SAFE VERTICAL AXIS WIND TURBINE
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 29, Taipei, Taiwan DEVELOPMENT OF SAFE VERTICAL AXIS WIND TURBINE FOR OVER SPEED ROTATION Minoru Noda 1, Fumiaki Nagao 2 and Akira
Aerodynamic Shape Design of the Bow Network Monitoring Equipment of High-speed Train
2017 2nd International Conference on Industrial Aerodynamics (ICIA 2017) ISBN: 978-1-60595-481-3 Aerodynamic Shape Design of the Bow Network Monitoring Equipment of High-speed Train Wang Zhe and Ji Peng
Measuring range Δp (span = 100%) Pa
4.4/ RLE 5: Volume-flow controller, continuous How energy efficiency is improved Enables demand-led volume flow control for the optimisation of energy consumption in ventilation systems. Areas of application
Numerical simulation of radial compressor stages with seals and technological holes
EPJ Web of Conferences 67, 02115 (2014) DOI: 10.1051/ epjconf/ 20146702115 C Owned by the authors, published by EDP Sciences, 2014 Numerical simulation of radial compressor stages with seals and technological
LONGITUDINAL AIR VELOCITY CONTROL IN A ROAD TUNNEL DURING A FIRE EVENT
- 27 - LONGITUDINAL AIR VELOCITY CONTROL IN A ROAD TUNNEL DURING A FIRE EVENT R. Borchiellini, V. Ferro, V. Giaretto Energy Department Politecnico di Torino Italy ABSTRACT Ventilation equipment is used
Gerald D. Anderson. Education Technical Specialist
Gerald D. Anderson Education Technical Specialist The factors which influence selection of equipment for a liquid level control loop interact significantly. Analyses of these factors and their interactions
6. Positioning. 6.1 General description
6. 6.1 General description The correct positioning of mixers and flowmakers in the biological treatment zones of a wastewater treatment plant is very important for the efficient operation of the plant.
Návrh vratného kanálu u dvoustupňového kompresoru Return channel design of the two stage compressor
Návrh vratného kanálu u dvoustupňového kompresoru Return channel design of the two stage compressor J. Hrabovský, J. Vacula, M. Komárek L. K. Engineering, s.r.o C. Drápela, M. Vacek, J. Klíma PBS Turbo
Filter Housings. Universal & Compact Multi-Chamber Filter Housings
Filter Housings engineer approved Universal & Compact Multi-Chamber Filter Housings White Knight dual- and quad-chamber filter housings fit standard filter cartridges offered by major suppliers. They provide
THE COLLEGE OF AERONAUTICS CRANFIELD
THE COLLEGE OF AERONAUTICS CRANFIELD AERODYNAMIC CHARACTERISTICS OF A 40 SWEPT BACK WING OF ASPECT RATIO 4.5 by P. S. BARNA NOTE NO. 65 MAY, 1957 CRANFIELD A preliminary report on the aerodynamic characteristics
Sandvik Jaw Crushers
Sandvik Jaw Crushers Excellent durability thanks to welded frame. Range including models for mobile applications. 2 The product of decades of experience At Sandvik we have over a century of experience
Advanced Pump Control for Irrigation Applications
Advanced Pump Control for Irrigation Applications Paul Nistler VFD Applications Engineer And Julian Atchia Director of Research and Development SJE Rhombus 22650 County Hwy 6 Detroit Lakes MN 56502 Executive
Inlet Swirl on Turbocharger Compressor Performance
Inlet Swirl on Turbocharger Compressor Performance Lei Huang, Ying Liu, Hua Chen* National laboratory of Engine Turbocharging Technology, Tianjin, China *corresponding author: Tel.:+86-22-5870-7069; fax:
CONTROL LOGIC DESCRIPTION DOCUMENT IC-410ND
Configuration # : 41G20F0 CONTROL LOGIC DESCRIPTION DOCUMENT IC-410ND Input/output table: Inputs Qty Outputs Qty Inside Temperature Probe 3 Inflatable Balloon 8 Chimney Temperature Probe 1 Chimney Activator
Development and evaluation of a pitch regulator for a variable speed wind turbine PINAR TOKAT
Development and evaluation of a pitch regulator for a variable speed wind turbine PINAR TOKAT Department of Energy and Environment Division of Electric Power Engineering CHALMERS UNIVERSITY OF TECHNOLOGY
Calculating Total Uncertainty of Temperature Calibration with a Dry Block. Calibration White Paper. Beamex.
Beamex Calibration White Paper info@beamex.com Calculating Total Uncertainty of Temperature Calibration with a Dry Block World-class calibration solutions Calculating Total Uncertainty of Temperature Calibration
Barcol-Air BRM Radiant Module
Barcol-Air BRM Radiant Module General The high capacity Radiant Cooling Module BRM is based on the principles of the radiant cooling technology. Due to the purpose designed profile and the geometry of
Density of Individual Airborne Wind Energy Systems in AWES Farms
16-Mar-2014, Request for Comments, AWELabs-002 Density of Individual Airborne Wind Energy Systems in AWES Farms Leo Goldstein Airborne Wind Energy Labs Austin, TX, USA ABSTRACT The paper shows that individual
High Pressure Breathing Air Compressors
High Pressure Breathing Air Compressors [ Full variety for different applications] MSA offers a comprehensive range of high pressure breathing air compressors for both the firefighting and diving market,
Investigation of Suction Process of Scroll Compressors
Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2006 Investigation of Suction Process of Scroll Compressors Michael M. Cui Trane Jack Sauls
How to make my Air Glide S work properly
How to make my Air Glide S work properly Originally written by Horst Rupp. Many thanks to Richard Frawley who edited and retranslated this article into proper English. 2014/11/21. The basic prerequisite
Understanding Centrifugal Compressor Capacity Controls:
Understanding Centrifugal Compressor Capacity Controls: Richard Stasyshan, CAGI Technical Consultant and the Centrifugal Compressor Section of the Compressed Air & Gas Institiute (CAGI). CAGI and our centrifugal
Solving ACC Axial Fan Wind Related Problems
Solving ACC Axial Fan Wind Related Problems Prepared for ACCUG Conference October 16, 2013 Las Vegas, Nevada By Martin J. Cuerdon P.E. 10/16/2013 Advanced Analytical Solutions, LLC 1 Axial Fan Design Attributes
The routine maintenance and inspection of local exhaust ventilation (LEV)
The routine maintenance and inspection of local exhaust ventilation (LEV) This document details the standards for inspection and maintenance that should be achieved for all local exhaust ventilation owned
J. Szantyr Lecture No. 21 Aerodynamics of the lifting foils Lifting foils are important parts of many products of contemporary technology.
J. Szantyr Lecture No. 21 Aerodynamics of the lifting foils Lifting foils are important parts of many products of contemporary technology. < Helicopters Aircraft Gliders Sails > < Keels and rudders Hydrofoils
Measurement of Pressure. The aerofoil shape used in wing is to. Distribution and Lift for an Aerofoil. generate lift due to the difference
Measurement of Pressure Distribution and Lift for an Aerofoil. Objective The objective of this experiment is to investigate the pressure distribution around the surface of aerofoil NACA 4415 and to determine
Development of Technology to Estimate the Flow Field around Ship Hull Considering Wave Making and Propeller Rotating Effects
Development of Technology to Estimate the Flow Field around Ship Hull Considering Wave Making and Propeller Rotating Effects 53 MAKOTO KAWABUCHI *1 MASAYA KUBOTA *1 SATORU ISHIKAWA *2 As can be seen from
Control of Nuclear Gloveboxes and Enclosures Using the No- Moving-Part Vortex Amplifier (VXA)
Control of Nuclear Gloveboxes and Enclosures Using the No- Moving-Part Vortex Amplifier (VXA) ABSTRACT M.J. Crossley AEA Technology ES. Inc. 1100 Jadwin Ave, Richland, WA 99352, USA This paper describes
Air distribution systems Circular displacement outlet with adjustable damper VA-ZD...
Air distribution systems Circular displacement outlet with adjustable damper VA-ZD... DS 059 E 05.010/1 Construction design and function Preliminary remarks Displacement air outlets enable to extract pollutants
DOUBLE-DUCTED FAN CROSS-RELATED APPLICATIONS
DOUBLE-DUCTED FAN CROSS-RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application No. 61/311,672 filed on March 8, 2010, which is incorporated herein by reference
Hywind. Deep offshore wind operational experience. Finn Gunnar Nielsen, Statoil RDI
Hywind. Deep offshore wind operational experience. Finn Gunnar Nielsen, Statoil RDI The starting point -2001 Inspired by floating sailing marks. Seawind matured during 2002 Tong, K.C. OWEMES seminar, Atena,
LED 14W POLO BULKHEAD WITH MICROWAVE SENSOR
INTRODUCTION The LED 14W POLO Bulkhead is a modern lowcost and energy efficient fitting ideal for domestic and utility applications. SPECIFICATION LED 1150lm IP54 220-240V IK09 4000K 50/ 60Hz >82 Ra 14W
INTRODUCTION 1.0 GENERAL
1 Chapter INTRODUCTION 1.0 GENERAL Blower is an important class of fluid machine, which has characteristics of transfer of energy between continuous stream of fluid & an element rotating about a fixed
Advantages of Carrier Gas Leak Detection using Novel Helium or Hydrogen Leak Detectors with Specific Sensor Types
19 th World Conference on Non-Destructive Testing 2016 Advantages of Carrier Gas Leak Detection using Novel Helium or Hydrogen Leak Detectors with Specific Sensor Types Klaus HERRMANN 1, Daniel WETZIG
Aerodynamic Forces on a Wing in a Subsonic Wind Tunnel. Learning Objectives
Aerodynamic Forces on a Wing in a Subsonic Wind Tunnel AerodynamicForces Lab -1 Learning Objectives 1. Familiarization with aerodynamic forces 2. Introduction to airfoil/wing basics 3. Use and operation
An Impeller Blade Analysis of Centrifugal Gas Compressor Using CFD
An Impeller Blade Analysis of Centrifugal Gas Compressor Using CFD Vivek V. Kulkarni Department of Mechanical Engineering KLS Gogte Institute of Technology, Belagavi, Karnataka Dr. Anil T.R. Department
Stability and Flight Controls
Stability and Flight Controls Three Axes of Flight Longitudinal (green) Nose to tail Lateral (blue) Wing tip to Wing tip Vertical (red) Top to bottom Arm Moment Force Controls The Flight Controls Pitch
RICK FAUSEL, BUSINESS DEVELOPMENT ENGINEER TURBOMACHINERY CONTROL SYSTEM DESIGN OBJECTIVES
RICK FAUL, BUSINESS DEVELOPMENT ENGINEER TURBOMACHINERY CONTROL SYSTEM DESIGN OBJECTIVES The primary design objective for any turbomachinery control system should be to maintain or maximize machine and
Resilience Engineering
Gunnar Steinhardt UPL Safety Seminar 31st of January 2015 Luxembourg Definition: Ability of a system to adjust its functioning prior to, during, or following changes and disturbances, so that it can sustain
OMS, OMT and OMV Orbital Motors. Technical Information
, OMT and OMV Orbital Motors Technical Information , OMT and OMV A Wide Range of Orbital Motors Revision History Table of Revisions Date Page Changed Rev ED Dimensions changed EF A Wide Range of Orbital
ENVIRONMENTAL CONTROL SYSTEM (ECS)
ENVIRONMENTAL CONTROL SYSTEM (ECS) DESCRIPTION AND OPERATION The ECS system comprises the following subsystems: bleed air management, environmental control unit (ECU) temperature control air distribution
valves and actuators SUBSEA ACTUATION
valves and actuators SUBSEA ACTUATION 100 C 55 M 20 Y 0 K 0 C 0 M 0 Y 80 K subsea PetrolValves offers a complete single-source integrated solution for manual or actuated high integrity ball, check, slab
Inlet Influence on the Pressure and Temperature Distortion Entering the Compressor of an Air Vehicle
Distortion Entering the Compressor of an Air Vehicle P. Hendrick Université Libre de Bruxelles, ULB Avenue F.D. Roosevelt, 50 1050 Brussels BELGIUM patrick.hendrick@ulb.ac.be ABSTRACT One of the possible
STALLING BEHAVIOUR OF A CONTRA-ROTATING AXIAL COMPRESSOR STAGE
STALLING BEHAVIOUR OF A CONTRA-ROTATING AXIAL COMPRESSOR STAGE by YASHPAL JAIN Thesis submitted in fulfilment of the requirements for the degree of DOCTOR OF PHILOSOPHY Department of Mechanical Engineering
Displacement 12, , Maximum flow rate (at 1450 rpm) bar.
00/07 ED PVD VARIABLE DISPLACEMENT VANE PUMPS SERIES 0 OPERATING PRINCIPLE The PVD pumps are variable displacement vane pumps with a mechanical type of pressure compensator. They allow instantaneous adjustment
Gas Compressor Operation and Control
Training Title Gas Compressor Operation and Control Training Duration 5 days Training Venue and Dates Gas Compressor Operation and Control 5 7 11 October, 2018 $4,000 Dubai, UAE Trainings will be conducted
Rub Tolerant Labyrinth Seals
Rub Tolerant Labyrinth Seals A Simple Method for Estimating the Effect of Upgrading Your Compressor Try this on your compressor to see if you can benefit from a conversion to rub tolerant seals. Degradation
Pre-swirl mechanism in front of a centrifugal compressor: effects on surge line and on unsteady phenomena in surge area
Pre-swirl mechanism in front of a centrifugal compressor: effects on surge line and on unsteady phenomena in surge area Amélie Danlos 1,*, Pierre Podevin 1, and Michel Toussaint 2 1 Conservatoire National
BIOGAS COMBUSTION PLANT MAINTENANCE MANUAL
BIOGAS COMBUSTION PLANT MAINTENANCE MANUAL (PLANT MAINTENANCE MANUAL) Puente Gallego Landfill, Rosario (Argentina) ARIA.BIZ S.A. Montevideo 589, 7 floor 1019 Capital federal Argentina Tel: +54 11 5171
THE BRIDGE COLLAPSED IN NOVEMBER 1940 AFTER 4 MONTHS OF ITS OPENING TO TRAFFIC!
OUTLINE TACOMA NARROWS BRIDGE FLOW REGIME PAST A CYLINDER VORTEX SHEDDING MODES OF VORTEX SHEDDING PARALLEL & OBLIQUE FLOW PAST A SPHERE AND A CUBE SUMMARY TACOMA NARROWS BRIDGE, USA THE BRIDGE COLLAPSED
RESOLUTION MSC.141(76) (adopted on 5 December 2002) REVISED MODEL TEST METHOD UNDER RESOLUTION 14 OF THE 1995 SOLAS CONFERENCE
MSC 76/23/Add.1 RESOLUTION MSC.141(76) THE MARITIME SAFETY COMMITTEE, RECALLING Article 38(c) of the Convention on the International Maritime Organization concerning the functions of the Committee, RECALLING
Conventional Ship Testing
Conventional Ship Testing Experimental Methods in Marine Hydrodynamics Lecture in week 34 Chapter 6 in the lecture notes 1 Conventional Ship Testing - Topics: Resistance tests Propeller open water tests
Temperature Controllers
IM0004 April 2013 CONTENTS T-12 Thermostat PAGE Introduction 1 Scope 1 Description 1 Specification 1 Temperature Controllers 2 INTRODUCTION CAUTION Prior to installing, the instructions provided herein
REQUIREMENTS AND HAND-OVER DOCUMENTATION FOR ENERGY-OPTIMAL DEMAND-CONTROLLED VENTILATION
REQUIREMENTS AND HAND-OVER DOCUMENTATION FOR ENERGY-OPTIMAL DEMAND-CONTROLLED VENTILATION Mads Mysen* 1, Axel Cablé 1, Peter G. Schild 1, and Kari Thunshelle 1 1 SINTEF Building and Infrastructure Forskningsveien
DEVELOPING YOUR PREVENTIVE MAINTENANCE PROGRAM
DEVELOPING YOUR PREVENTIVE MAINTENANCE PROGRAM By Owe Forsberg, Senior Consultant You are the new Reliability Engineer in a plant that currently lacks documented procedures to maintain the plant. You have
A Performanced Based Angle of Attack Display
A Performanced Based Angle of Attack Display David F. Rogers, Phd, ATP www.nar-associates.com The Problem The current angle of attack displays basically warn you about the approach to stall with yellow
SHAFTING VIBRATION PRIMER
CADEA The ultimate stop for solving marine propulsion shafting vibration or design problems Trg M. Pavlinovica 6 HR-21000 Split, Croatia Tel./Fax +385 21 490 154 http://www.cadea.hr SHAFTING VIBRATION
DN300 DN2000 C Plunger Valve
ל DN300 DN2000 C Plunger Valve P.O.B 46 MOSHAV SHTULA WESTERN GALILEE 2286500 Tl. +972-(0)77-6656101, Fax. +972-(0)77-6656196 Website: www.saisanketvalves.com www.saisanket.com email: saisanket@saisanket.com