Air Filtration Design and Application


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Air Filtration Design and Application selection methods using Low Energy Air Filters to deliver clean air and make energy savings.

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Air Filtration Design and Application

  1. 1. Welcome to the Camfil Farr Training AcademyBy the end of this session you will know more aboutAir Filtration Design and Application selection methodsusing Low Energy Air Filters to deliver clean air andmake energy savings 1
  2. 2. Production Facility ● Low Energy Air Filters Sales Office ● Agent ● Head Office ●2011 global sales £435 million24 Production Plants, 4 R&D Centres 23500 employees
  3. 3. Air Filtration must deliver clean Indoor Air QualityClean air that peoplecan breathe withoutrisk to healthOptimised selection forplant energy efficiencyand low running costs 3
  4. 4. Comfort airA healthy andbeneficial climateOfficesHotelsSchoolsShopping centresConference centresAirports 4
  5. 5. Clean processes Protecting processes Bio Pharma Food and beverage Pulp and paper Automotive Hospital 5
  6. 6. Camfil Farr Low Energy Air Filters use to saveMoney, Energy and Carbon 6
  7. 7. Help your clients gain the benefits of Low Energy Air Filters both in new and existing buildingsMeet Part L energy guidelines by reducing fan energy consumption in mechanical ventilation and AC systemsOptimize the air filter selection and performance in refurbished ventilation and Air Conditioning systems 7
  8. 8. See the Energy Saving Opportunity£14430 per year Low Energy Air Filters There are about 50000 buildings with large AC systems CIBSE 8
  9. 9. The Low Energy Air Filter opportunity1. Why we need Air Filters ?2. The energy consumed by Air Filters ?3. How we optimise our Air Filter Selection ?4. Life Cycle Costing (LCC) and Air System Factors ?5. Payback time. Return on Investment (ROI) What is the benefit? 9
  10. 10. Low Energy Air Filters for Indoor Air Quality Why we need Air Filters? The primary purpose of Air Filters in building HVAC systems is to filter and clean air for people to breathe without risk to health. The secondary purpose of Air Filters in building HVAC systems is to filter air to keep clean and protect the air plant duct system and the internal fabric of the building. 10 10
  11. 11. Air Quality problems in the UK UK Government report indicates PM2.5 pollution is 3X more damaging to public health than passive smoking. 5X more damaging than loss of life due to road accidents 11
  12. 12. Stay healthy – stop breathing?• We spend 80% of our time inside• 50 % of all particles inside come from outdoor air. 50 % are generated from indoor sources• The particles penetrate the building through ventilation or leaks.• Air pollution adversely affects the growth of lung function during the period of rapid lung development that occurs between the ages of 10 and 18. (The New England Journal of Medicine) 12
  13. 13. Graph indicating probability of progress of PM ultra-fine particulate pollution into the human respiratory system 13
  14. 14. The relevant standards for Low Energy Air Filters The filter test standard that applies to the testing of air filters is EN779:2002 EN13779:2007 advises F7 as a minimum and F9 as the advised for required particulate efficiency 14
  15. 15. Particulate Efficiency % Particle Size Microns 15
  16. 16. Particulate Efficiency % Particle Size Microns 16
  17. 17. Particulate Efficiency % Particle Size Microns 17
  18. 18. A Typical Air Handling Unit and its component sections 1 - Supply air duct 2 - Fan section 3 - Flexible connection 4 – Heating/Cooling coils 5 - Filter section 6 - Air intake duct• Air filters separate any airborne particles from air flow.• Their purpose is to : • provide clean air and Indoor Air Quality to building occupants • keep the HVAC system clean and energy efficient 18
  19. 19. Air Handling Unit energy flow Frost coil Heating coil Gas-filter (Carbon) Pre-filter Cooling coil Secondary-filter Damper FAN AttenuatorIntake Air FAN Supply Air MOTOR OUTSIDE INSIDE Electrical Energy input via motor 19
  20. 20. Energy consumed by air filters Clean air with economic benefits The cost of ventilation Pascal• The energy requirement for 40% ventilation is expensive. 30% of total system• Filters account for approx. 30% of pressure loss the total energy cost of the 20% system. (C.I.B.S.E. data)• Filters are the most inexpensive part of the system to improve. 4%• Without Capital Expenditure 20 20
  21. 21. The energy demand Clean air with economic benefitsThis equation calculates the kilowatt hours consumed by an element of aventilation system based upon average pressure loss q × dP × tE= [kWh/year ] η × 1000 q = Air flow (m3/s) dP = Pressure drop (Pa) t = Operating time (hours/year) h = Fan efficiency (20% - 65% ?) 21
  22. 22. Energy Optimisation with Low Energy Air FiltersFor example using F7 filter grade as advised by BS:EN13779:2007Options:6 pocket 380mm long bag has about 200pa pressure drop initially12 pocket 635mm long bag has about 85pa pressure drop initiallyOver a period of one year allowing for the pressure drop increases asthe filters work the estimated save in energy consumption as below.**Energy £300 the difference in filter price is about £30**(Ratio 10:1 at 10p per KW/hr.) 22
  23. 23. Energy consumed by Air Filters Clean air with economic benefits Choosing the right bag filter saves Energy• Low Energy Air Filters use an optimised design in order to minimise energy consumption with Tapered stitch on pockets.Poorly manufactured pockets lose performance, use more energy 23
  24. 24. Energy consumed by air filtersExample of urban offices block and savings Office block 8000M2 floor area with 30 full size filter apertures. (3 AHU’s) This office block can show an energy saving of £ 14430 per year with the equivalent of 3 AHU’s as shown in the next slide. 24 24
  25. 25. Energy consumed by air filtersEnergy saving on one AHU volume flow 10m3/s over one year Replaced by F7 Bag + G4 Panel F7 Hi-Flo Bag 2.9 M2 Media 9.2 M2 Media This represents a money saving of £ 4810 per year on this AHU or saving of over 70% on electrical energy. 25 25
  26. 26. How we optimise our Low Energy Air Filter selectionA Hi-flo F7 M7 Bag filter with 9.2 M2 of micro- fibre media has the optimum low pressure drop and consistent high particulate efficiencywith a longer working life BS:EN13779:2007 advises F7 minimum efficiency 26
  27. 27. How we optimise our air filter selectionCamfil Low Energy Air Filters optimise Energy performance and Air quality + Hi-Flo F7 + Hi-Flo F7 to give F9 Hi-Flo F7 is the optimum single stage F7 solution Note: It is required that these F7 filters are mounted in front withdrawal frames to 27 27 ensure there is no significant air bypass
  28. 28. Recommended Low Energy Air Filter typesFor the best LCC performance 1.filter in class F7.Recommended models are1. Hi-Flo M7 2.2. Opakfil F7For compact systems 28
  29. 29. When a new filter looses its electro-static charge the particulate efficiency drops significantly MPPS region100 % Total Efficiency InterceptionE [%] Diffusion Straining, Inertia Electrostatic 0 0.1 1 10 Particle size (µm) 29
  30. 30. Comfort ventilation Hi-Flo F7 Typical Particle => .4 micron Synthetic Competitor F7 S-Flo F7 30
  31. 31. How we optimise our air filter selectionImpact assessment• 200 Buildings• Serviced by 5 air handing units• Each having 10 standard 2 stage apertures• Number of 2 Stage apertures• 200 x 5 x 10 = 10,000 apertures• Will make annual Energy savings (considered on above criteria)• WILL SAVE ENERGY VALUE OVER 2.3 MILLION POUNDS• EACH YEAR EVERY YEAR 31
  32. 32. Life cycle costing & air system factors Clean air with economic benefitsEnergy is part of the Eurovent LCC model The life cycle cost for the filter is the cost of the: • Filters • Labour • Energy consumption • Cleaning of ventilation system • Disposal of used filter = LCC 32 32
  33. 33. HVAC Filter Specification guidance Design for an efficient future HVAC Secondary filters to be selected to EN13779:2007 guidelines F7 to F9 class Air Filters to have been tested in accordance with BS EN779:2012 Eurovent Life Cycle Cost for Air Filters to be used to optimise air filter selection The Air Filter manufacturer to be independently accredited by Eurovent Air Filters are to be manufactured under approved quality system BS EN 9001:2000 BS EN13053 advises minimum F7 for single stage AHU systems Design details BS EN1886:2007 test limits for air bypass in Air Handling Units mean that FWF front withdrawal filter mounting frames will be required. Air Handling Units are normally fitted with both Primary and Secondary Air Filters sections minimum length 700mm.long suitable for full length Bag filters. In general for HVAC applications Microglass Hi-Flo media is recommended as it has a consistent particulate efficiency throughout its working life. 33
  34. 34. Short Payback timeAir Conditioning Inspection reports can save Energy, Carbonand Money - A typical neglected AHU • Rare access to poorly maintained AHU’S needing refurbishment. • Opportunity for solution of Low Energy Air Filters to deliver air of the required Air quality, and using the minimum of energy. • Short payback time of a few months makes AHU air filter bank refurbishment an attractive option. 34
  35. 35. Filter optimisation gives shortest payback time Annual Savings – for a 10 m3/s systemElement % Kwhr £ Revenue or capital PaybackUpgrade filters 22% 6000 600 Revenue < 3 monthsClean coils 10% 2500 250 Revenue < 6 monthsUpgrade fans 35% 60000 6000 Capital > 24 monthsUpgrade chillers 40% 136000 13600 Capital > 36 months Table is prioritised by payback period Data source – EECO2 Energy Efficiency Consultants (Low Carbon Consultants) 35
  36. 36. Low Energy Air Filter Service Packages• Low Energy Air Filter AHU filter mounting upgrades• Complete Low Energy Air Filter installation and maintenance contracts• AHU filter monitoring with demonstration of benefits• Additional Duct cleaning and coil cleaning AHU system packages. 36 36
  37. 37. Short Payback timeSignificant savings with Low Energy Air Filters• Labour to replace filters would reduce by half or greater• Waste disposal would reduce by half or greater• Supply chain environmental impact would reduce as well• CO2 reduced substantially• A sustainable option• Case studies for sectors• Consistent performance•• 37 37
  38. 38. Short Payback timeEnergy Opportunities Major Focus on Cost and Saving the Environment. Our Air Filter Solutions contribute to - Healthy Indoor Air Quality - Reduced ”Carbon Footprint” - Cut Energy Consumption We are all looking for Savings -These represent no risk to your client - No capital expenditure - Revenue payback – 3 months 38
  39. 39. Camfil Farr 1st Manufacturer in UK to achieve EN16001 in UK European union target Camfil Achievements so far : By 2020 Tangible reductions in Energy -20% energy consumption, consumption Gas 35%, -20% fossil fuels, Electricity 22%, Diesel fuel 19% +20% renewable energies Environmental targets Water 12%, & Waste 17% reductions 39
  40. 40. See the Energy Saving Opportunity£14430 per year Low Energy Air Filters There are about 50000 buildings with large AC systems CIBSE 40
  41. 41. THANK YOU for attending this webinar session ANY QUESTIONS? Please do not hesitate to contact Camfil Farr for any additional information or to arrange a visit.For more information about clean air solutions, improving air quality, low energy air filters, CRC (Carbon Reduction Commitment), AHUs (Air Handling Units) and the EPBD, visit the 41 blog and subscribe to the RSS Feed