Tunnel Ventilation - Systemair
Tunnel FansTunnel VentilationBusiness Area Tunnel Fans
Trust SystemairTrust the leaders for air diffusion andair movementSystemair’s story is a story of innovation, intuitionand breakthrough technologies. It is also a story ofthe women and men that have made thempossible, of their lives spent for a goal that is notjust of the company. As, if there is a value that isshared by all the professionals of Systemair, it is theone to believe that a better technology can providea better life for all. The sensibility towards theenvironment and the constant search for productionand logistics solutions of high energy efficiency arejust few aspects of this value: a value that anyoneworking together with Systemair’s professionals canfeel. It is the trust of who knows of working withwomen and men part of an important companywith an important ideal.2systemair
Systemair:Quality has always countedIf Systemair has achieved the ISO 9001 and ISO 14001certifications it is not only due to institutional duty: thesearch for constant improvement of quality is an absolutemust that leads every decision making and productionprocess. The choice of the suppliers, the definition ofmethods, the selection of production sites, the search forthe most suitable technology and material so to satisfyevery goal, are inside the DNA of the international realitythat has never forgotten the key values of its founder andof the men and women that have made it important. It isfor such confidence that Systemair offers as standard athree year warranty on all its fan models.Testing centre for axial fansThe axial fan technology testing centre is based in theproduction site of Windischbuch, Germany. The strive forcontinuous improvement of the fans led to need of a stateof the art testing facility that now allows measurement offan performances according to the ISO 13350, AMCA210-99, DIN ISO 5801 and DIN 24163 standards. Jet fansand large axial fans of volume flows up and exceeding500.000m3/h can be tested, with customers as welcomedwitnesses, for the measurement of key values as: volumeflow, thrust (for jet fans), vibration levels, noise levels,absorbed currents, rotation speed.Where ideas become solutions:the new research and development centreInside one of the largest and modern test laboratoriesof Europe, fully AMCA (Air Movement and ControlAssociation International, Inc) and ISO qualified, theresearchers of the Systemair R&D Centre measurevolume flow levels, sound levels, efficiencies and allother important characteristics of fans, air terminals,heat recovery systems, and air curtains. Tests, results,and measurements, become products and solutions,benchmarks for the air diffusion and air movementmarkets.systemair3
Systemair M.R.T. DivisionSystemair, world-wide leader for themanufacturing andcommercialization of air diffusioncomponents and fans, based in morethan 50 countries and comprising5200 specialists, definitely entersthe field of infrastructure ventilationthanks to the acquisition of the4systemairMatthews & Yates assets.The MRT (Metro Road and Train)division was created with thepurpose of following actively thisparticular market so to supplyventilation systems for undergroundapplications as, metros, road, trainand hydraulic tunnels. The staff, witha specific knowledge of thepeculiarities of these applications,follows each project withcompetence and care.MRT division is to be the solereferent for the companies that workin underground projects. Our
proposal is global as Systemair cansupply ventilation systems from thevery start of the project duringtunnel construction and follow thesupply of the final ventilationsystems needed to control internalair quality and fire safety measures.Moreover, understanding theimportance of such works and theneed of safety required, we provideunique solutions to our customers.In close cooperation with them, wedesign, according to the enforcedstandards and laws, the mostsuitable ventilation system, notsolely relying on standardizedprevious solutions. We will provideour experience and tools for helpingyou during design, control andoptimization, supervising installationand verifying together thefunctionality of the ventilationsystem. Each new contract is anincentive to provide you a tailormade solution.For tunnel in construction we areable to provide the most suitableproducts for each single needfollowing a sizing of the systemsaccording to the enforced laws.Each peculiarity connected with theventilation system will be discussedand cleared so to provide a solutionjust for you. An example being theparticular care we take in sizingsound attenuation systems,optimizing each solution according tothe specific needs of eachinstallation.For the definitive ventilationsystems, we offer consultants,construction companies andmechanical contractors, ourcompetence and support fordesigning the proper ventilationsystem for each single project. Incase of fire, the safety of the users,is the key element and a correctlysized ventilation system is the mostsuitable means to control the smokeand heat produced by the fire and tosave lives. Knowing the project fromthe early stage (construction), weare able to propose the most correctproducts for ambient comfort andsmoke control in case of fire. As apartner, our staff will follow youthrough the different steps of theproject, being available forsupervision during installation,start-up and control of the suppliedproducts performances (aeraulic andacoustic), up till the finalcommissioning in respect of thetender documents.Systemair invests in research anddevelopment programs and ownsone of the largest and moderntesting labs in Europe whereinnovations have allowed the designof premium quality products, eachsingularly tested and dedicated tothis field in conformance with themost recent international standards.The MRT Division shares Systemair’svision: satisfying the customer,anticipating his needs supportinghim along the process of makingeach single project an opportunityfor mutual benefit and growth.Due to the constant work andcompetence of its specialistsSystemair can once more defineitself as a leading air distribution andmovement group.Tunnel Drilling VentilationPage 6Road Tunnel VentilationPage 10Metro and Rail VentilationPage 20ServicePage 25Trust Systemair.systemair5
Tunnel Drilling VentilationVentilation during tunnel construction is needed so to provide the externalair required to dilute the pollutants produced by the machines used duringthe different stages of the manufacturing granting the working squads asafe environment.6systemair
Systemair is able to provide the necessary technicalsupport for designing the proper ventilation system usingthe enforced international laws and recommendations asthe Italian D.P.R. 20-3-56, the Swiss SIA 196 and theFrench AFTES and supplying the resulting products.Systemair ProductsAxial fans manufactured in single stage or in multi-stageunits realized by coupling one or more contra-rotating fansso to deliver large air volumes with high pressure heads(over 5000 Pa).The adjustable pitch angle configuration and variableimpeller solidity offers a wide performance range andmaximum flexibility to match precisely individual airflowand noise requirements, while considering energyefficiency, allowing for successive re-use of the fans fornew projects.Systemair’s Key Distinctive ElementsFans manufactured using sturdy cases, hot dip galvanizedafter manufacturing with spun flanges for high rigidity andpremium structural strength for long lifetime service insevere conditions.Systemair’s proposal is not only centered on its axial fantechnology but comprises all required ancillaries andcomponents so to provide the most suitable solution foreach single project. According to the agreed configurationsand design results, Systemair can propose: mountingskids, frequency converters, sound attenuators, flexibleducts and tailor-made components so to providecustomers the complete ventilation system taking care ofits global functionality.systemair7
8Silenced drilling application in urban contextDrilling application with flexible duct assemblyDeduster installation on TBM(Tunnel Boring Machine)Sound AttenuatorsFlexible DuctsFrequency ConvertersSound emissions can be greatlyreduced by adopting the correctsolutions as adding cylindrical silencersto the fan or by realizing uniquelydesigned splitter silencers, particularlyuseful in urban environment wheresound impact is becoming ever soimportant.Both are manufactured in heavy dutyconstruction with significant steelsheets thicknesses to grant sturdinessand lifetime. All acoustic silencers aredesigned for the real life situationrequirement and are manufactured toallow direct mounting of the flexibleducts or to connection pieces.The Easy Joint flexible ducts,manufactured in smeared polyesterPVC fabric, are available from 500mm to 3000 mm diameter. Ducts aremanufactured in stretches of lengthbetween 1 m and 150 m and ofdifferent weights up to 850 g/m2chosen based on the maximumpressure level it will be subject inexercise. The innovative junctionsystem allows easy installation whilemaintaining intact the sturdiness andreliability. Ducts can be supplied inanti-static and self-extinguishingmaterial for tunnels in which certifiedanti-explosion products are required.Delivered to be either installed insideelectric cabinets or as stand-aloneunits in IP54 protection class, allpre-programmed before delivery andwith control panels as standard.systemairDesignSystemair’s proposal includes thedesign of the proper ventilationsystem basing calculations on theenforced international laws andrecommendations as the Italian D.P.R.20-3-56, the Swiss SIA 196 and theFrench AFTES.
Urban context fan assemblySystemair is able to providefor all ventilation systemsdesign the proper materialand support during:conceptual design,installation andcommissioning.Quality and ReliabilityAll products are CE certified andproduction and commercialization areperformed under ISO 9001 and ISO14001 certifications. Our qualitysystem allows us to improve ourproducts and our customersatisfaction. Reliability is guaranteedby severe quality control procedureswithout shipping any fan withouthaving first performed running testsso to verify its functionalityDeduster systemDust filters: DedusterSystemair has increased its productrange with the introduction of thenewly designed DS deduster. The DSdedusters, are designed so to be ableto reduce the dust content in the airin demanding applications foundduring all underground constructionprojects, being them hydraulic, rail orroad tunnels, and during tunnelrefurbishing. The filter efficiencies areextremely high reaching 99.9% forparticle sizes between 0.2 e 2microns for dust concentration up to2500 mg/m3. All particles of greatersizes are completely stopped andtreated.Deduster systems are ever moreneeded by health organizationespecially when silica or asbestos ispresent in the rock that is beingtreated.Installation inside tunnel during constructionFor mechanical drilling of tunnels,dedusters are used to reduce theamount of dust, frequently unhealthyfor the working squads, created bythe construction operations. In thiscase the DS will be supplied on skidsfor ease of movement so to followthe construction progress.The DS deduster can also be usedwhen TBMs (Tunnel Boring Machine)are used for the construction of longtunnels. In this application thededuster is used to capture the dustthat rises from the conveyor belt thatbrings the drilled material towardsthe TBMs end. Due to the limitedspace available, the deduster needsto be tailor-made so to reduce to aminimum the hindrance to workersand optimize installation.ServiceThe long term experience andprofessionalism of our engineersallow to support each customer alongthe projects phases, following theinitial design stage, up to supportinghim to the commissioning of theplant; assisting him with keyelements for this particular marketas: pre-programming of thefrequency converters, detailedinstallation procedures, and preassembling of the fan units andancillaries so to allow directconnection to the other plantcomponents.systemair9
Road Tunnel VentilationNew road tunnels will be required for the foreseeable future due to thefollowing main reasons: Density of the population increasing worldwide Economic growth of developing countries Increase in prosperity leading to:- Increased vehicle ownership- Increased movement of goods by road (HGV)- Need to decrease journey times (goods/private)10systemairSystemair, as market leader for tunnel ventilation systems,is able to provide technical expertise for the design of theventilation systems, supply state of the art products andsupport staff for the installation, commissioning andrunning of the delivered systems.
Design of Road TunnelVentilation SystemDesign ventilation rates are based upon providing asufficient supply of air to dilute the pollutant emissionsfrom vehicles (Carbon Monoxide, Nitrogen Oxides, andparticulate matter) and tunnel wear (dust), for the periodof time in which the users of the tunnel may be exposed.The control of the effects of fire is also extremelyimportant in tunnels. The ventilation system needs to besized so to provide sufficient velocity and direction forcontrolling the spread of smoke in the event of a fire.safety as: “PIARC” – Permanent International Associationof Roads Congress, “WTC” – World Tunnel Congress,“WHO” – World Health Organization and NationalGuidelines – ANAS In Italy, CETU in France, RABT inGermany, etc.Systemair uses the latest prescriptions andrecommendations coming from the official internationalbodies setting the standards for air quality and tunnelsystemair11
Road Tunnel Ventilation SystemsThe choice of the type of ventilation system for a road tunnel depends on different keyelements such as: length, unidirectional or bidirectional traffic, gradient, cross-section,peak traffic flow rates, fire size, etc.Longitudinal ventilationLongitudinal ventilation isaccomplished by using jet fans that,by accelerating a small part of the airpresent in the tunnel, through anexchange of momentum, are able toinduce, on the overall air inside thetunnel, a movement in the willeddirection.The same is accomplished for firesmoke propagation control. Normallyused for unidirectional tunnels withrelatively short lengths ( 3 km).Systemair ProductKey Distinctive ElementsJet Tunnel Fans from 500 mm to 1600mm for thrusts up to 2100 N and EN12101-3 heat and smoke removalcertification up to 400 C for 120 min.operation. Fan development has beenverified structurally with finiteelement analysis and performancetests follow ISO 13350 standard.Cases with augmented thicknesses forpremium structural strength andlong-lifetime service in severeconditions. All elements have beenaccurately designed as: the motorexternal terminal box connection, thepredisposition for fixing of vibrationsensors and alignment switches, andthe support frames designed for easeand reduction of installation times.Possibility of supply of ancillaries such as:vibration transducers, support frames,dis-alignment switchesExtra size terminal box for ease of installationand cabling12systemair
Jet fan AJ1000TRJet fan AJ1120TRSemi-transversal VentilationSemi-transversal ventilation uses airducts to introduce inside the tunnelset flow rates of fresh air so toaccomplish the dilution of thepollutants. In case of fire, the fansneed to be able to reverse theirrunning direction so to extract thesmoke flow rate and grant safeenvironment to the tunnel users.Normally used for bi-directionaltunnels with need of augmentedsafety.systemair13
Road Tunnel Ventilation SystemsTransversal VentilationTransversal ventilation uses separateair ducts to introduce inside thetunnel set flow rates of fresh air andextract the flue air from the tunnel.The system grants the greatestsafety and efficiency to the tunnelusers but is also the most expensivesolution due to the high civil workcosts involved (large ventilationrooms and large cross-sections toallow ducting).Normally used for long bi-directionaltunnels with high traffic levels andhigh percentage of heavy goodvehicles transit.Systemair ProductLarge axial fans, both unidirectionalor truly reversible for both runningdirection. Volume flows up to150 m3/s and 5000 Pa of pressureusing contra-rotating fans in series.EN 12101-3 heat and smoke removalcertification up to 400 C for 120 min.operation.Axial fan AXR2000Motor and external lubrication detailsExtra sized external terminal box14systemair
Sturdy tube casing constructionSilencer installation exampleMultileaf damper installationexampleKey Distinctive ElementsSound AttenuatorsMultileaf DampersTube casings, realized in hot-dipgalvanized steel after manufacturing,for premium structural strength andlong-lifetime service in severeconditions. Motors include copperlubricators for motor bearing regreasing and are supplied forVSD control with A/C heaters andtemperature sensors.Fan development has been verifiedstructurally with finite elementanalysis and performance testsfollow ISO 5801, DIN 24163,AMCA 210-99 standards.Extra size terminal box for ease ofinstallation and cabling withIP65 protection class.Possibility of supply of ancillariessuch as: vibration transducers,inertia base frames and antivibrationmounts, transition pieces anddiffuser, air interception dampers,extract dampers, acoustic silencers,control systems, static frequencyconverters (inverters), etc.Sound emissions can be greatlyreduced by adopting the correctsolutions as adding cylindricalsilencers to the fan or by realizinguniquely designed splitter silencers,particularly useful to reduce soundimpact when intake or exhaust shaftsare used.Both are manufactured in heavy dutyconstruction with significant steelsheets thicknesses to grantsturdiness and lifetime.All acoustic silencers are designed forthe real life situation requirement andare manufactured to allow directmounting inside the allocated spaces.Splitter baffles can be mounted onrail systems so to allow the possibilityof easy cleaning procedures. Allmaterials used are classified as A1 forfire behavior according to ISO EN13501-1 standard.Being their use to intercept theventilation room fans or for theextracting the flue air and smoke fromthe tunnel, multi-leaf dampers areoften a key element for a fullyfunctional ventilation system. Thedampers offered are all realized forthe greatest reliability having beensubject to fatigue tests to simulateyears of operation inside tunnels.Sizes are not an issue as, by couplingdifferent modules together, virtuallyany dimension can be easily realizedand manufactured. Dampers can beprovided with fully electric actuatorsor with pneumatic and fail-safe returnmodules, granting great flexibility ofchoice to suit any need or request.Stainless steel can be employed forthe manufacturing of all of thedamper components and heat coversto protect the actuators from the hightemperature involved with firescenarios can be supplied if needed.Air leakage tests, blade deflection andpressure drop tests can be organizedat need as well as the possibility ofsupplying BS 476 part 20 compliantdamperssystemair15
Solid model for FEM analysisFEM vertical loadsFEM axial loadsDesignSystemair can provide assistance and realize designcalculations based on PIARC, CETU and internationalstandardsrev.2LONGITUDINAL VENTILATION PRELIMINARY DESIGN – FIRE EMERGENCYHYPOTHESISThe scope of the study is to size the longitudinal mechanical ventilation system for the Riva and Camlik tunnelsfollowing the indication received after the meeting in your office in Istanbul.Tunnel DataLength [m]SlopeCross-section area [m2]Perimeter [m]Hydraulic diameter [m]Height of the tunnel [m]Riva Downhill684-0.7%122.9145.3410.848.4Riva Uphill714 0.6%122.9145.3410.848.4Camlik Uphill740 1.69%122.9145.3410.848.4Camlik Downhill628-1.74%122.9145.3410.848.4The ventilation system will be so sized to be able to guarantee an air velocity over the critical velocity in all thecross-section of the tunnel in accordance to the indication of NFPA502.Critical velocity calculationThe simultaneous solution of the following equations, by iteration, determines the critical velocity.The critical velocity, Vc, is the minimum steady-state velocity of the ventilation air moving toward a fire that isnecessary to prevent backlayering.Tf is smoke/air temperature inside the cross-section immediately after the fire. gHQ Vc K 1 K g ρC p AT f where:VcK1KggHQρCpATfT Q TTf ρC AV pc Introducing the data :TunnelAtRiva Downhill122.91 m2Riva Uphill122.91 m2Camlik Uphill122.91 m2Camlik Downhill 122.91 m2uo3.066m/s3.038m/s2.609m/s2.639m/sFire Obstruction Losses (Δpfire)Uv377 m3/s373 m3/s321 m3/s324 m3/sIn an emergency scenario the effects of the fire must be accounted for, one effect is theblockage caused by the fire, this can be calculated by the following formula:-INFLUECE OVER PRESSURE LOSSESThe pressure losses depend quadratically to the air speed and, thus, to the temperature. The dynamicpressure of the air is:Where the following formula from CETU methodology is used to calculate ξexp:- 11M ρ u2 u22 At withM ρ u AtSmoke Buoyancy Effects (Δpbuoy)Where the massic flow is assumed constant in static conditions.TUNNEL FRICTION PRESSURE LOSSThe following formula is used to determine the friction pressure loss.The buoyancy of the rising smoke plume will give some assistance to the ventilationsystem, this can be expressed by the following formula:- l ρ 0 u 02 T p g λ 2 T0 Dh (Pa)where: critical velocity[m/sec] 0.606 (Froude number factor, Fr 1/3) grade factor (see Figure D.1 in annex E of NFPA 502 ed.2014) acceleration caused by gravity[m/s2] height of duct or tunnel at the fire site[m]8.4m for this tunnels heat fire is adding directly to air at the fire site[kW] 2/3 of the firepower average density of the approach (upstream) air[kg/m3] 1.2 specific heat of air[kJ/kg K] 1009 area perpendicular to the flow[m2] 122.91 average temperature of the fire site gases[K] temperature of the approach air[K] 291 (18 C)After the fire the temperature will reduce due to heat exchange with the tunnel wall and ambient air.So to be able to analyze the temperature reduction convective and radiant heat coefficients Φc e Φrad asdetailed in the PIARC procedure are used.The design is based on PIARC 2007 calculation procedure and assume the following conditions:TunnelThermic Fire PowerCritical VelocityTf(K/ C)*Riva Downhill200 MW3.074m/s582 / 309Riva Uphill200 MW3.038m/s586 / 313Camlik Uphill100 MW2.609m/s463 / 190Camlik Downhill100 MW2.639m/s461 / 188*for a complete explanation of calculation please check PIARC 05.16.B.2006 pag. 263-267 pgλlDhT0 pressure loss in a tunnel section of ‘l’ lengthfriction loss coefficient (0.025)length of tunnelhydraulic tunnel diameterWall temperature (assumed equal to ambient temperature)(Pa)(m)(m)(K) p i α ρ 0 u 022where:α where:(Pa)9,81 m/s2g:gravity accelerationd:slope of the tunnel (positive or negative)For an uphill tube the chimney effect is positive and acting in favor of the ventilation system.localized pressure loss coefficient( 0.5 )OUTLET PRESSURE LOSSThe following formula is used to calculate the outlet pressure loss : p e CHIMNEY EFFECTThe chimney effect can be positive or negative depending on the position and direction of the air andventilation system. The formula for the chimney effect is pe.c. (ρ 0 ρ ) g d lINLET PRESSURE LOSSThe following formula is used to calculate the inlet pressure lossρ 0 u 02 T2 METEOROLOGICAL EFFECTThe wind speed is set to be 3m/s equating to a Pmeteo 6.48Pa counterpressure.(Pa)T0PRESSURE LOSS DUE TO THE FIRESeveral studies have determined that the fire has a negative effect over the tunnel’s fluidodynamics due to theturbulence and acceleration produced by the combustion. The effect can calculated as sum of the FireObstruction Losses ( pfire) and the Smoke Buoyancy Effects ( pbuoy).Analyzing the trend of the fire along the tunnel, it is possible to verify the minimum temperature class requiredto the fans.The trends, calculated with the PIAR formula, are shown in the below graphics.For a downhill tube the chimney effect is negative and acting against the ventilation system.PRESSURE DROP DUE TO THE VEHICLESThe Congested vehicle inside the tunnel cause a resistance for the moving air. It is considered with thefollowing equation: p veh n (cw A)vehAT ρ 0 u 02(Pa)2Where n is the number of Congested vehicles and(cw A)veh its resistance surface.The formula have to be applied for each type of vehicle.For this application has been considered:4/81/83/816systemair
Road Tunnel Ventilation SystemsQualityServiceFan product range is certified according to EN 12101-3 forsmoke and heat removal up to 400 C for 120 min., andhas been verified structurally with finite element analysis.Performance tests follow ISO 5801, DIN 24163,AMCA 210-99 and ISO 13350 standards.Systemair supports you in every step of the projectfollowing you onsite granting supervision duringinstallation, start-up, commissioning and running period.EN 13350 jet fan testing rigJet fan arrangementSystemair is able to provide for all ventilation systemdesign the proper material and support during:conceptual design, installation and commissioning.Assembly linesystemair17
Metro and Rail VentilationThe increase of population in urban areas causes a significant incrementof traffic and pollution.To solve this problem, without hindering economic growth, people haveused underground transport systems to decongest cities. Subways andunderground rail systems allow rapid transit times while transporting alarge number of users.18systemair
The increase of population in urbanareas causes a significant incrementof traffic and pollution. To solve thisproblem, without hinderingeconomic growth, people have usedunderground transport systems todecongest cities. Subways andunderground rail systems allow rapidtransit times while transporting alarge number of users.As known, closed undergroundenvironments tend to keep moreconstant temperature conditionsthan outdoor environments. This ismainly due to the lack of naturalventilation and air exchange. Inmetros, though, the influx of a largenumber of people and the presenceof moving trains, generates areduction of oxygen levels and anincrease in heat and pollutantproduction. Mechanical ventilation is,then, required to allow thenecessary air exchange and grantusers of the underground trainsystems safe and comfortableconditions.Ventilation systems have a secondand even more important purpose,that is to grant safety in case of fireemergency. It is possible that fordifferent reasons, a fire can start instations or inside rail tunnels withpotential serious risks for the usersof a mass rapid transit. Smokeproduced by the fire is the mainenemy to fight off as it causes areduction in visibility and isextremely noxious and deadly ifbreathed. Mechanical ventilation isdesigned so to prevent smoke toreach people fleeing the metro orrail system while avoiding the fatalconsequences.Understanding the importance ofsuch plants, the MRT division ofSystemair has gained in-depthknowledge of the needs andrequirements for such mechanicalventilation systems and can providea valuable support to designers andmechanical contractors to determinethe most suitable solutions for theirparticular need.Systemair products are chosen so tooptimize the ventilation systems andcalculation results can be providedfor, as example, system pressuredrops, or acoustic sound levelstowards the platform or towards theambient, so to confirm productselections.Truly reversibile AXR 2000- 300kWDetails of installation of jet fans in rail tunnelThe MRT division of Systemairfollows customers through all theproject’s phases: starting fromverifying the ventilation system’scharacteristics up to the final testingand commissioning, when needed.Unidirectional AXC 2000 – 160 kWsystemair19
Metro and Rail Ventilation20Systemair ProductsSystemair’s Key Distinctive ElementsThe core elements of the ventilationsystem are the axial fans that are allcertified according to the lateststandards and in continuousdevelopment so to obtain the highestquality standards.The range includes unidirectional andtruly reversible fans for volume flowup to 150 m3/s and high pressurelevels. The possibility of varying thenumber of blades and hub size allowsto define each fan to the specificduty requirement while optimizingpower consumption and energyefficiency.Fans manufactured using sturdy cases,hot dip galvanized after manufacturingwith spun flanges for high rigidity andpremium structural strength for longlifetime service in severe conditions.The impellers are all statically anddynamically balanced according to ISO1940 standard and all rotating partsare subject to X-ray inspectionaccording to ASTM E155 proceduresso to exclude any faults in thecastings.Zyglo testing is also possible as option.Fans have been certified for smokeand heat removal according to ISO12101-3 and development has beenverified structurally with finiteelement analysis while performancesystemairtests follow ISO 5801, DIN 24163,AMCA 210-99 standards.Systemair’s proposal is not onlycentered on its axial fan technologybut comprises all required ancillariesand components so to provide a fullyfunctional ventilation system.According to the agreedconfigurations and design results theSystemair’s scope of supply caninclude: vibration transducers, inertiabase frames and antivibration mounts,transition pieces and diffusers, airinterception dampers, by-passdampers, acoustic silencers, controlsystems, frequency static converters(inverters), etc.
Special movable silencer for Metro applicationFan interception damperVentilation for technical roomsSound AttenuatorsMulti-leaf DampersSound emissions are particularlyimport
The axial fan technology testing centre is based in the production site of Windischbuch, Germany. The strive for continuous improvement of the fans led to need of a state of the art testing facility that now allows measurement of fan performances according to the ISO 13350, AMCA 210-99, DIN ISO 5801 and DIN 24163 standards. Jet fans
Air Volume Controls Make your life easy with Systemair constant and variable volume controllers. Simple installation and settings makes sure that diffusers will have just the amount of air. For larger air volumes Systemair Iris dampers are the perfect solution. . accessory there are plenum boxe
Feb 21, 2018 · Downtown Tunnel #1 Hampton Roads #1 Midtown Tunnel #1 Thimble Shoal #1 & Chesapeake #1 Hampton Roads #2 Downtown Tunnel #2 Monitor-Merrimac Midtown Tunnel #2 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 65 Years of Tunneling in
Virginia Tunnel Inspections June 27, 2016 RESTRICTED – CRITICAL INFRASTRUCTURE INFORMATION; This document and all information contained therein is considered as . Thimble Shoal Tunnel. 9. Chesapeake Channel Tunnel. Roanoke Airport Tunnel . I-564 Runway Tunnel. 10. 11. 8. 9. 11. 10. RES
solution that is easy to service. Inspection windows. The windows have been designed exclusively for Systemair and provide a large area for easy inspection. Panels. Elimination of thermal bridges. Separation between inner sheet and outer sheet (0,8 mm) with 60 mm insulating mineral wool. Density: 60 kg/m3. Aluzinc AZ 185 or
parameters are temperature, air speed and air pressure. Codes, regulations and design guides for ventilation systems are reviewed. Different ventilation designs adopted in local vehicular tunnels are described. Better ventilation design for a typical vehicular tunnel is proposed with the application of Computational Fluid Dynamics.
Mechanical Ventilation: Schedule History, Concepts and Basic Physiology – Nader Volume Control Ventilation (CMV, ACV) – Nader Intermittent Mandatory Ventilation (SIMV) – Nader Pressure Support Ventilation (PSV) – Nader Pressure Control Ventilation (PCV) –
ventilation à haute fréquence aboutirent à la mise au point de deux types très différents d'appareils : ceux délivrant la ventilation par percussions à haute fréquence ou high frequency percussive ventilation (HFPV) et ceux délivrant la ventilation à percussions intrapulmonaires ou intra-pulmonary percussive ventilation (IPV).
Mechanical Ventilation: Schedule History, Concepts and Basic Physiology - Nader Volume Control Ventilation (CMV, ACV) - Nader Intermittent Mandatory Ventilation (SIMV) - Nader Pressure Support Ventilation (PSV) - Nader Pressure Control Ventilation (PCV) - Junker Pressure Regulated Volume Control (PRVC) - Junker
