Mod. 2 Sub.5, MS 1 Air Filtration

Mod. 2 Sub.5, MS 2 Air filtration purposes To keep clean the environment To keep clean the environment for the people health and well-being for the people health and well-being To allow manufacturing process sensible to the To allow manufacturing process sensible to the impurities presence impurities presence To safe surfaces from dirt To safe surfaces from dirt To safe equipment from wear, increase the lifetime To safe equipment from wear, increase the lifetime

Mod. 2 Sub.5, MS 3 The air we breathe Nitrogen 78% Rare gas: Argon, Neon, Helium Vapors and other gas : water, methane, carbon monoxide, ammoniac, ozone Atmospheric impurities : dust, sand, marine salt, spores, pollens in total 1% (in weight at sea level)

Mod. 2 Sub.5, MS 4 Treated substances by human body in 24h Air kg

Mod. 2 Sub.5, MS  m Tobacco smoke, bacteria, metallic fumes  m Tobacco smoke, bacteria, metallic fumes 10  m Heavy atmospheric dust 10  m Heavy atmospheric dust Aerosol suspension of some liquid or solid particles in the air Reference Human hair:  150  m approx. 25  m Debris and other particles visible to the naked eye 25  m Debris and other particles visible to the naked eye 5-10  m Molds, pollens, average atmospheric dust 5-10  m Molds, pollens, average atmospheric dust 1-5  m Bacteria, light atmospheric dust 1-5  m Bacteria, light atmospheric dust Size (  m) of certain small particles

Mod. 2 Sub.5, MS 6 AEROSOLS Suspension of some liquid or solid particles in the air Dusts Solid aerosol generated from the reduction of larger solid material Fumes Solid aerosols formed by the condensation of vapors of solid materials. Fogs Liquids aerosols formed by the condensation of water vapor in the air. Mists Liquids aerosols formed by atomization of liquids GASES Any material which has the tendency to expand indefinitely and which completely and uniformly fills the container it occupies

Mod. 2 Sub.5, MS 7 Particle size distribution in the atmosphere number of particles weight  m 98.5 % 98.5 %  m: 3%  m: 6%  m: 11%  m: 52%  m: 28%

Mod. 2 Sub.5, MS 8 Electronic air cleaners impose a charge on dust particles and then set up an electrostatic field to attract the particles to oppositely charged collectors. They are usually parallel plates or a filter media electrostatically charged by a continuous external power source.

Mod. 2 Sub.5, MS 9 Principles of air filtration 1. Interception Low speed, Van der Waals forces 2. Inertial effect Increasing function of air speed, particle mass, depth of the filter 3. Straining Big and fibrous particles, independent of the speed 4. Diffusional effect Smallest particles, Brownian movement

Mod. 2 Sub.5, MS 10 Gas-phase air filtration principles Adsorption Gas, vapors and liquids are attracted to and held on the surface of another substance, with atomic or molecular forces, not chemical reactions. Gas, vapors and liquids are attracted to and held on the surface of another substance, with atomic or molecular forces, not chemical reactions. The adsorbent materials have a enormous numbers of macro and micro pores, with big ratio between surface and volume. F.i.: activated carbon with 1400 square meters per gram, activated alumina, zeolites and silica gel. The adsorbent materials have a enormous numbers of macro and micro pores, with big ratio between surface and volume. F.i.: activated carbon with 1400 square meters per gram, activated alumina, zeolites and silica gel. Adsorption can occur wherever a material has sufficient attractive force to overcome the kinetic energy of a gas molecule. The absorption of cigarette smoke on the interior of an automobile or a person clothing is an example of absorption. Adsorption can occur wherever a material has sufficient attractive force to overcome the kinetic energy of a gas molecule. The absorption of cigarette smoke on the interior of an automobile or a person clothing is an example of absorption. Chemical adsorption (Chemisorption) Is the the result of chemical reactions on the surface of the adsorbent. It depends on the chemical nature of both the adsorbent and the adsorbate. Desorption of targets contaminants, once adsorbed and chemically reacted, does not occur. Is the the result of chemical reactions on the surface of the adsorbent. It depends on the chemical nature of both the adsorbent and the adsorbate. Desorption of targets contaminants, once adsorbed and chemically reacted, does not occur.

Mod. 2 Sub.5, MS 11 Test methods CEN EN 799 Standard (Former Eurovent EU4/5) Filter on test Colorimetric Efficiency Atmospheric air Gravimetric Arrestance Synthetic dust

Mod. 2 Sub.5, MS 12 Filtration ArrestanceEfficiency (%)(%) G1Am < 65 G265  Am < 80 G380  Am < 90 G490  Am F540  Em <  60 F660  Em < 80 F780  Em < 90 F890  Em < 95 F995  Em CEN EN 799 Standard (Former Eurovent EU4/5)

Mod. 2 Sub.5, MS 13 Filtration ArrestanceApplications class (%) G1Am < 65Places with fats and high humidity, f.i. kitchens G265  Am < 80 G380  Am < 90Ventilation systems for palestrae garages, industries, plant rooms G490  Am Ventilation systems for auditories, stores, waiting rooms, churches, courts Pre-filters

Mod. 2 Sub.5, MS 14 Filtration EfficiencyApplications class(%) F540  Em < 60  To filter smallest particles: F660  Em < 80 big stores, bar, halls, F7 80  Em < 90 libraries, airports F890  Em < 95 Ventilation systems for: museums, computer rooms, research laboratories F9Em  95 Ventilation systems for: hospitals, research labs, clean zones Intermediate air filters

Mod. 2 Sub.5, MS 15 Filtration EfficiencyApplications class(%) F  Em <  For hospitals, F  Em < nuclear plants, F  Em < electronic devices F  Em < manufacturing, F  Em clean rooms High efficiency filters to stop extremely fine particles, gas and smokes

Mod. 2 Sub.5, MS 16 Comparative performance between the test methods for general guidance only  PERCENT ARRESTANCE (ASHRAE Standard 52.1 Test Method) % ATMOS. DUST-SPOT EFFICIENCY (ASHRAE Standard 52.1) G1 G2 G3 G4 F5 F6 F7 F8 F9 CEN EN 799 Standard

Mod. 2 Sub.5, MS 17 Filter types by configuration: Panel Filters Metals, natural fibers, glass fibers, synthetic fibers Metals, natural fibers, glass fibers, synthetic fibers  20  m,  20  m, Air velocity: m/s Air velocity: m/s Starting pressure drop: Pa Starting pressure drop: Pa Final pressure drop: Pa Final pressure drop: Pa Generally not renewal Generally not renewal Efficient only for big particles (> 5  m) Efficient only for big particles (> 5  m) Face velocity Media velocity

Mod. 2 Sub.5, MS 18 Filter types by configuration: Pleated Panel Filters Extended surface filter: the media velocity is less than the face velocity

Mod. 2 Sub.5, MS 19 Filter types by configuration: Close-pleated filters Extended surface filter: the media velocity is less than the face velocity By pleating paper media into a filter pack By pleating paper media into a filter pack Large amount of filter media Large amount of filter media Very low pressure drop Very low pressure drop

Mod. 2 Sub.5, MS 20 Filter types by configuration: Bag Filters Extended surface filter: the media velocity is less than the face velocity Natural fibers, glass fibers, synthetic fibers Natural fibers, glass fibers, synthetic fibers More pockets with one frame More pockets with one frame Starting pressure drop: Pa Starting pressure drop: Pa Final pressure drop: Pa Final pressure drop: Pa Not renewal Not renewal Efficient for particles from 1 to 5  m Efficient for particles from 1 to 5  m

Mod. 2 Sub.5, MS 21 Impact filter: dust capture mainly with impact Filter types by configuration: Grease filters To prevent the grease accumulation in kitchen To prevent the grease accumulation in kitchen Metallic (steel or aluminum) grid Metallic (steel or aluminum) grid To be removed and washed To be removed and washed Low efficiency, low capacity Low efficiency, low capacity Filter types by configuration: Roll filters Clean filter unrolled at one end Clean filter unrolled at one end Exposed at the dirty air stream Exposed at the dirty air stream Dirty media is rolled onto the second roll Dirty media is rolled onto the second roll Glass fibers or synthetic media panels Glass fibers or synthetic media panels Rolling speed as a function of the pressure drop Rolling speed as a function of the pressure drop

Mod. 2 Sub.5, MS 22 LEGENDA 1) Fan 2) Electrical panel 3) Finned coil 4) Air filter 5) Compressor Under model Over model Himod Cyclone of Innovations

Mod. 2 Sub.5, MS 23 Clogged filter alarm (opt.) Into our units can be installed a settable differential pressostat in order to have from the microprocessor control the warning about the needed change of the clogged filters. Range: Pa Differential manometer (opt.) Into our units can be installed a differential manometer in order to know the current pressure drop across the filter

Mod. 2 Sub.5, MS 24 Air velocity across the filters Unit Surface Air flow Velocity (m 2 )(m 3 /s)(m/s) Hiflex 4SUA/4LUA SUA/8LUA Himod 20UA UA

Mod. 2 Sub.5, MS 25 Enclosures