Performance Comparison of Dimple Pl eat Separator and Ri bbon Separator Radial Flow HEPA Filters.
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1 Performance Comparison of Dimple Pl eat Separator and Ri bbon Separator Radial Flow HEPA Filters. Paxton K. Giffin, Michael S. Parsons, John A. Wilson, and Charles A. Waggoner Institute for Clean Energy Technology Mississippi State University 32 nd N ucl ear A i r Cl eaning Conference June 17-19, 2012 D enver, CO
2 Introduction AG-1 Filter Qualification Currently no Qualified Filters TWG Critically Reviewed Qualification Status Existing Data D ated (1990) Limited Particle Size Distribution Limited Characterization N eed f or Fi l ter Lif ecycl e Loading D ata N eed f or Testing at Conditions Representative of A ctual Use (El evated Temperature & Relative Humidity Conditions) 2
3 D i mple Pl eat Separators M anufacturer : Fl anders Fi l ters Rated Fl ow : 56.6m 3 /min (2000 CFM ) Two V ersi ons: Saf e Change (A & B) and Remote Change (C & D ) Filter Type Safe Change Remote Change # of Pleats Media (m 2 ) Interior Diameter (cm) A B C D 3
4 Ribbon Separators M anufacturer : Vokes Air (UK) Rated Fl ow : 56.6m 3 /min (2000 CFM ) Larger A nnulus D i ameter than D i mple Pl eated Fi l ters (35.6 cm (14i n.)) 4
5 Fi l ter Separators D i mple Pl eat Ri bbon Separated 5
6 A mbient Temperature/RH 6
7 El evated Temperature/RH 7
8 Test D ata Presented 8
9 Chal l enge A erosol PSD 9
10 M ass Loading Curves Ambient Conditions D i mple Pl eated Fi l ters 12 Differential Pressure (KPa) Safe Change - Carbon Black Safe Change - Carbon Black Remote Change - Carbon Black Remote Change - Carbon Black Remote Change - AZ Road Dust Remote Change - AZ Road Dust Safe Change - AZ Road Dust Remote Change - Alumina Safe Change - Alumina Remote Change - Alumina Mass (grams) 10
11 Ambient Conditions Mass Loading Curve Comparison 800g 1000g 1500g 11
12 Ambient Condition Results Fi l tering Ef f i ci ency and D ow nstream Concentration vs. D i f f erential Pressure Challenge Aerosol: Alumina 12
13 Ambient Condition Results Penetration Curves 300 nm 13
14 Elevated Condition Results D i mple Pl eat Fi l ter Tests 14
15 Elevated Condition Results Ri bbon Separator Fi l ter Tests 15
16 D i mple Pl eat Testing I mages 16
17 Ri bbon Separator Testing I mages 17
18 Post Rupture I mages Dimple Pleat Filter Ambient Conditions 18
19 Post Rupture I mages Dimple Pleat Filter El evated Temperature and Rel ative Humidity 19
20 Post Rupture I mages Ri bbon Separator Fi l ter 20
21 Results Comparison Conclusions M ass Loading Capaci ty Filtering Efficiency El evated Condition Performance Resistance to Rough Handling Fi l ter Pack Endurance Application Considerations Recommendation for Future Testing 21
22 A ck now l edgement We acknowledge the support of this work under D OE Cooperative A greement DE-FC01-06EW
23 23
24 D amaged Ri bbon Pl eat Fi l ter Fi l ter w as shipped i n a box, not a crate. Fi l ter has thinner gauge metal f or protective gril l and strengthening bands. Less physically robust as dimple pleat filters manufactured by Fl anders. This filter was used for ambient conditions loading capacity test, which was outside of the initial scope of work for ribbon pleat f i l ter testing. 24
25 OLD SLID ES 25
26 I mage Saf e Change Fi l ter Col l ected at 28.3 m 3 /min (1000cf m) af ter Rupture 26
27 Remote Change Test 1 14 First Remote Change Filter Test Elevated Conditions Portion of Testing 90 Differential Pressure (kpa) :57:36 13:12:00 13:26:24 13:40:48 13:55:12 Time Differentail Pressure Elevated Related Humidity Elevated Temperature Elevated Temperature (ºC) and Relative Humity (%) 27
28 Saf e Change Test 1 Differential Pressure (kpa) Differential Pressure, Humidity, and Temperature vs. Time Safe Change Elevated Conditions Test Filter Elevated Portion of Testing :42:43 11:54:14 12:05:46 12:17:17 12:28:48 12:40:19 Differential Pressure Time Temperature Relative Humidity Temperature (ºC) and Relative Humidity (%) 28
29 A CFM vs SCFM Separator I ssues Conclusions D i mple Pl eat & El evated RH and T Losing Rigidity and Dimples relax Large A spect Ratio of the Pl eats 29
30 AG-1 Radial Fl ow Representative Filters Two V ersi ons Tested Remote Change Saf e Change D i mple Pl eat Remote Change Filter Type Safe Change # of Pleats Remote Change Media (m 2 ) Safe Change Interior Diameter (cm)
31 Testing Conditions Ambient Temp: 15.6 to 26.7º C (60 to 80º F) RH : 40 to 60% Load w i th aerosol until f i l ter rupture or 12.5 k Pa (50 i n.w.c.) i s reached. El evated Load with aerosol under ambient conditions until 1 kpa (4 in. w.c.). Chal l enge w i thout aerosol at an el evated temperature of 31
32 Project Technical Working Group Mississippi State University Institute for Clean Energy Technology D epartment of Energy EM -30 D N FSB (D ef ense N ucl ear Faci l i ties Saf ety Board) N N SA (N ational N ucl ear Saf ety Administration) FTF (Filter Test Facility), ATI Labs D OE Si tes and Contractors Fl anders CSC 32
33 Single Radial Filter Airflow During Testing Blind Blind Filter 33
34 Aerosol Injection KTRON Powder Feeder Vaccon Critical Orifice Compressed Air Inlet 24 Test Stand Nozzle 3 Flange 34
35 Sensors Filter Housing RH/Temp Readout Differential Pressure Pressure Sensor Relative Humidity Sensor Differential Temperature Temperature Sensor RH Probe 35
36 Test Parameters and Guidelines: Remote Change Dimple Pleat Filter Safe Change Dimple Pleat Filter Test Set 1: 56.6 m 3 /min (2000 SCFM) 15.6 to 26.7 (60 and 80) Aerosol #1 (Alumina) Aerosol #2 (Carbon Black) Aerosol #3 (AZ Road Dust) 2 Filters 2 Filters 2 Filters 1 Filter 1 Filter 1 Filter Ribbon Separator Filter Remote Change Dimple Pleat Filter Safe Change Dimple Pleat Filter Ribbon Separator Filter 40-60% RH Max dp and/or failure Test Set 2: 56.6 m 3 /min (2000 SCFM) 54.4ºC (130ºF ) % RH Max dp and/or failure 1 Filter N/A N/A 2 Filters N/A N/A 1 Filter N/A N/A 1 Filter N/A N/A 36
37 Burner Characterization Alumina Baseline Particle Size Distribution dn/dlog dp (#/cc) Particle Diameter (µm) 37
38 Burner Characterization Burner Operational Settings and Impact on CO Emissions Turns CO Emissions (PPM) Turn 2 Turns 3 Turns 4 Turns 5 Turns 6 Turns 7 Turns Primary Air Controller Set Point Burner Operational Settings and Impact on "Flame Temperature" Flame Temperature (ºF) Turns 1 Turn 2 Turns 3 Turns 4 Turns 5 Turns 6 Turns 7 Turns Primary Air Controller Set Point 38
39 Burner Aerosol Resolution Burner, Alumina, and Ambient Air PSD Particle Concentration (#/cc) dn/dlogdp Particle Diameter (nm) Burner Startup PSD Alumina PSD Ambient Air PSD Burner Warmed Up PSD 39
40 Volumetric Flowrate (m 3 /min) Elevated Flow Examination Pi tot Traverses Horizontal Traverse Distance (m) from Bottom Wall Vertical Traverse Distance (m) from Back Wall No Straightener Center With Straightener With Straightener and Burner Volumetric Flowrate (m 3 /min) No Straightener Center With Straightener With Straightener and Burner 40
41 Elevated Flow Examination Differential Pressure (kpa) Safe Change Filter Test (Preloaded with Alumina to 1 kpa) Operated at Elevated ACFM flowrates to mimic SCFM at elevated T m^3/min 71 m^3/min 57 m^3/min 0 68 m^3/min 40 14:38:24 15:07:12 15:36:00 16:04:48 Time Volumetric Flowrate (Std m3/min) Differential Pressure (KPa) Volumetric Flowrate (Std m^3/min) 41
42 D ow nstream Camera Digital Camera LED Ring Light Test Filter Camera Pan and Tilt Head 42
43 D ow nstream Camera 43
44 Upstream Camera A B Digital Camera Swivel Mechanism LED Lamps C D 44
45 M ass Loading Curves All Filters 12 Mass Loading Curves All Flters Differential Pressure (KPa) Safe Change - Carbon Black Safe Change - Carbon Black Remote Change - Carbon Black Remote Change - Carbon Black Remote Change - AZ Road Dust Remote Change - AZ Road Dust Safe Change - AZ Road Dust Remote Change - Alumina Safe Change - Alumina Remote Change - Alumina Mass (grams) 45
46 First Test Filter Saf e Change 46
47 Test Stand Characterization Burner Characterization Burner Aerosol Resolution El evated Fl ow Examination Traverses (Compare w / Previous) El evated Temperature Examination Issue with operational flow 47
48 El evated Temperature Examination Differential Pressure (kpa) Filter Preloaded to 1 KPa with Alumina Tested at 56.6 m 3 /min Actual Flow with Elevated Temperature 56.6 m C Add 50% Burner & Water Spray OFF :38:24 14:52:48 15:07:12 15:21:36 15:36:00 15:50:24 16:04:48 16:19:12 16:33:36 Differential Pressure Time Volumetric Flowrate (Std m^3/min) Volumetric Flowrate (Actual m^3/min) Volumetric Flowrate (m3/min) 48
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