Published on March 12, 2014
Air Filter Solutions For Solar Power Equipment
This webinar will be available afterwards at www.solarpowerworldonline.com & email Q&A at the end of the presentation Hashtag for this webinar: #SolarWebinar Before We Start
Moderator Kathie Zipp Solar Power World Presenter Dan Krupp Universal Air Filter
Air Filter Solutions for Solar Power Equipment 2014
Today’s presentation… Air Filters in Solar Energy Systems • Types of equipment • Contamination & system failure System Design Considerations • Industry standards and compliance • Thermal management / pressure drop Air Filter Specification Process • Air filter frames and media • Special shaped filters to accommodate chassis Other Design Factors • Complementary system features / components • Design partner offerings Overview
Air Filters in Solar Energy Systems
Utility Scale Grid Applications Schneider Electric Conex Core XC Series – PV Inverter
Utility Scale Grid Applications Satcon Equinox PV Inverter
Utility Scale Grid Applications Power-One Aurora PV & Wind
Utility Scale Grid Applications Eaton S-Max Series Grid Tied Inverters
Utility Scale Grid Applications American Superconductor D-VAR Grid Stabilizer
Enclosure Door Solutions UAF filters prevent energy production loss Filters for enclosure doors Filters for power transformation, communications, and other interior equipment (ABB, AEG, Rittal, etc…)
Enclosure Door Filters OEM-supplied air filters have not proved acceptable with: Contamination control Durability Serviceability
Interior Enclosure Filters When enclosure door filters fail: Unfiltered air enters the enclosure Negatively impacts smaller cabinet air intake filters Electrical panels overheat and fault Energy production fails
Representative Power-Gen Applications Wireless Base StationPhoto Voltaic Wind Energy
Contamination Wrecks Equipment
Air Filters Get Dirty
Quadrafoam keeps out dust and moths.
Very clean inside thanks to Quadrafoam.
Green Washable Filters Save Money & Improve Efficiency Clean and re-install air filters Avoid purchasing, inventory, distribution costs Last several years depending on environment Sustainability-friendly Reduce waste
Air Filter Maintenance Keep cooling air quality high and reduce energy consumption Replace / clean air filters as dirty air filters block airflow Improve equipment energy efficiency. Replacing dirty, clogged filters lowers energy consumption by 5% to 15% Avoid equipment failure
System Design Considerations
System Design Considerations You need to design a solar power chassis… Enclosure size Density – electronics and components Fan ratings – power and noise Fan or blower locations Industrial designs And don’t forget the… Air filter – fit , form, function
Industry Standards and Classifications UL 1741 Inverters, Converters, Controllers and Interconnection System Equipment NEMA 3R Outdoor Enclosures NEMA 12 Indoor Enclosures IP 54 Ingress Protection Rating UL 94 HF-1 Component plastics flame spec UL 900 Air filter flame spec Mil-Spec Applying commercial standards where appropriate
Total Thermal System Management Thermal management... Intake / Exhaust Air flow path Hot / cold aisles Thermal analysis software libraries... 6 Sigma FloTHERM IcePak MacroFlow
Total System Pressure Drop System Components affect airflow Power supplies Perforated metal Card guides EMI / Faraday cages Industrial designs / bezels / plenums Air filters
Fan/Filter System Relationship Fan / blower location… Push = Pressurization Pull = Evacuation Push + Pull
Pressurization Pros: All air is filtered in harsh environments Air straightening Pressure equalization Cons: Higher pressure drop through filter Space requirements Maximize plenum between fan and filter
Evacuation Pros: Maximize cooling air Saves space Lower filter pressure drop Cons: Not all air is filtered Potential air bypass Limited air straightening / pressure equalization from filter
Pressurization + Evacuation Pros: Maximum cooling air Bigger air filters Cons: More space Higher power requirements Increased noise
Air Filter Spec Process
Framed Filter Assembly Options Air filter frame features… Thin, low profile frame • < 0.25” thick • Edge to edge filtration • Extended filter surface area Consider chassis structure • Align filter structure with chassis obstructions • Special shape filter to accommodate chassis Filter removal and installation features • Accessories – tabs, handles, thru holes, captive fasteners • Ease of maintenance
Solar Equipment Filter Products Metal Mesh Air Filters Rugged frame assemblies Outdoor and other harsh environments Available with integrated EMI shielding Washable and reusable Ultra-thin options for limited space applications
Solar Equipment Filter Products High Efficiency Air Filters Extends equipment operating life Enhances air quality Custom MERV 11, 13 & 15 Captures dust, mold & pollen Commercial / industrial applications Rigid aluminum frame and robust media for durability
Solar Equipment Filter Products Electrostatic Air Filters High strength Light weight Abrasion resistant Acid / alkali / bleach / solvent resistant Mildew resistant FDA approved UV protected Reduce waste / sustainability friendly
EMI Air Filters & Vents In addition to air filters, UAF offers custom: Air filters with EMI shielding capabilities EMI vent panels Honeycomb Fireblock Panels Watch the PyroCide Video - next slide
OSP Filter Specs UPE Membrane Filter Media (Ultra High Molecular Weight Polyethylene with Microglass backer) Standard 7.5 pleats per inch Pleat depths from 1.00” – 4.00”
Additional OSP Filter Features Cleanable open-cell polyurethane foam pre-filter Available with RoHS compliant corrosion resistant finish Medium density urethane foam interlocking gasket
OSP Filter Performance Wind Driven Rain Test Filters have been Tested and Certified to meet the requirements of GR-487 Section 3.28.1
OSP Filter Performance Rain Intrusion Test Filters have been Tested and Certified to meet the requirements of GR-487 Section 3.28.2
OSP Filter Performance Salt Fog Testing Filters have passed a 168 hour (7-day) Salt Fog Test using a 5% salt fog concentration per ASTM B-117
Air Filter Specification Process Determine standards & specifications – NEMA/IP, UL1741,RoHS, CE Understand flame rating requirements – UL 94 Select air filter dimensions (length, width, thickness) Select appropriate framed air filter model Determine handles / tabs or other fixture add-ons Select flame retardant media (thickness and porosity) Calculate linear airflow velocity Calculate maximum filter initial resistance Select media color and special metal finishes Prepare filter drawing – 3D CAD / online tools Free prototypes – test and evaluation
Air Filter Media Selection Many filter configurations…and colors… NEBS air filter assembly requirement • GR-63 R4-61 – UL 94 HF-1 • GR-63 R4-19 – 65% avg dust arrestance (<2U) • GR-63 R4-20 – 80% avg dust arrestance (<3U) Media to fit within frame profile • 0.125”, 0.25” and 0.5” thick for most applications • Multiple porosities and/or densities available • Reduce pressure drop / maximize airflow Industrial Design or maintenance considerations • Colors to best fit system aesthetics / bezel • Lighter colors for quick and easy maintenance inspection
Other Design Factors
Electrical Enclosure – Fire Safety
Electrical Enclosure – Fire Safety Fire audits have confirmed the effectiveness of UAF flame retardant air filters Example of UAF filters containing the spread of fire to neighboring telecom enclosures
Maintenance / Sustaining Engineering Address air filters in maintenance procedures Recommend cleaning / replacement clean: every 3-6 months…replace: every 2-3 years Offer replacements Kit replacements in appropriate quantities with other components and maintenance instructions
Compliance UAF Products Comply: UL 94 recognition UL 900 registration EU Directive 2002/95/EC China RoHs EU No. 1907/2006 REACH
Power-Gen Air Filters Prototypes in 5 days UL Listed and CE Certified Support compliance to UL 1741 EMI shielding available Special metal finishes for corrosion protection / enhance EMI Outside plant membrane filters for harsh environments
Servicing OEM & Aftermarket UAF’s target customer is OEM thermal / mechanical design engineer focused on forced air cooling in electronics enclosure applications Authorized by the equipment OEMs to service their customers and ensure timely replacement filter supply
Review Consider air filters early in the design process Understand industry & customer requirements Analyze custom enclosure configuration for total system thermal and design management Specify filter utilizing the latest technological innovations, including EMI shielding Ensure customers can acquire replacements
UAF - APAC Established in 2007 In-country support for OEM Production Procurement Asia Pacific and China region Support solar energy operators and OEM manufacturers
UAF - EMEA Established in 2008 In-country support for design centers and filter procurement Netherlands based for Europe and Israel Support solar energy operators and OEM manufacturers
Universal Air Filter Co. Thank you for attending. For webinar materials and information go to: www.uaf.com/webinar On Spec, On Time…Every Time
1624 Sauget Industrial Parkway, Sauget, IL 62206 P: 618.271-7300 | F: 618.271.8808 | www.uaf.com
Questions? Solar Power World Kathie Zipp firstname.lastname@example.org Phone: 440.234.4531 Twitter: @SolarKathieZ Universal Air Filter Dan Krupp email@example.com Phone: 618.271.7300
Thank You This webinar will be available at www.solarpowerworldonline.com & email Tweet with hashtag #SolarWebinar Connect with Twitter: @SolarPowerWrld Facebook: …/SolarPowerWorld LinkedIn: Solar Power World Group Discuss this on EngineeringExchange.com
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