[{"command":"settings","settings":{"basePath":"\/","pathPrefix":"","setHasJsCookie":0,"ajaxPageState":{"theme":"iaqa_u","theme_token":"yMJ3JMBXRkZzZztbjE279BfeQAuTHGguXa8xLGPgqX0","jquery_version":"1.10"},"CToolsModal":{"loadingText":"Loading...","closeText":"Close Window","closeImage":"\u003Cimg typeof=\u0022foaf:Image\u0022 class=\u0022img-responsive\u0022 src=\u0022https:\/\/university.iaqa.org\/sites\/all\/modules\/contrib\/ctools\/images\/icon-close-window.png\u0022 alt=\u0022Close window\u0022 title=\u0022Close window\u0022 \/\u003E","throbber":"\u003Cimg typeof=\u0022foaf:Image\u0022 class=\u0022img-responsive\u0022 src=\u0022https:\/\/university.iaqa.org\/sites\/all\/modules\/contrib\/ctools\/images\/throbber.gif\u0022 alt=\u0022Loading\u0022 title=\u0022Loading...\u0022 \/\u003E"},"edu-modal-style":{"modalSize":{"type":"fixed","width":"auto","addHeight":700,"height":"auto"},"modalOptions":{"background-color":"black"},"closeText":"\u003Ci class=\u0022fa fa-times-circle\u0022 title=\u0022Close\u0022\u003E\u003C\/i\u003E","loadingText":"","modalTheme":"edu_modal_theme","animation":"fadeIn","animationSpeed":"medium","throbberTheme":"edu_modal_throbber"},"better_exposed_filters":{"views":{"course_modal":{"displays":{"block":{"filters":[]}}}}}},"merge":true},{"command":"modal_display","title":"Enhanced Particle Collection Through the Combination of Filtration and Electric Field Control","output":"\u003Cdiv class=\u0022view view-course-modal view-id-course_modal view-display-id-block view-dom-id-59e6a42997fe4fa94462ebf11f879602\u0022\u003E\n \n \n \n \u003Cdiv class=\u0022view-content\u0022\u003E\n \u003Cdiv class=\u0022views-row views-row-1 views-row-odd views-row-first views-row-last\u0022\u003E\n \n \u003Cdiv class=\u0022views-field views-field-field-edu-body\u0022\u003E \u003Cdiv class=\u0022field-content\u0022\u003E\u003Cp\u003EPresenter Bio: Mark Ereth\u003C\/p\u003E\n\u003Cp\u003EMark H. Ereth, MD, Physician, Scientist, Inventor, TED speaker. Mark serves as Emeritus Professor, Mayo Clinic College of Medicine and Science, and Chief Medical Officer for SecureAire Technologies, LLC. Dr. Ereth is an internationally known expert in anesthesiology, and blood transfusion, and cardiopulmonary bypass and a frequent speaker at medical schools and hospitals around the world. Dr. Ereth\u2019s career has been marked by innovation and collaboration. In his 25 years at the Mayo Clinic, he provided anesthesia and critical care to over 20,000 patients, directed a multi-disciplinary research group, and authored more than one hundred peer-reviewed journal articles and abstracts. He holds multiple patents for medical devices, and upon retirement from the Mayo Clinic, has focused on Indoor Air Quality. He presented his second TEDx talk entitled \u0027One Less...\u0027 at the U Tulsa TEDx conference focusing on the impact of combustion on pollution and disease. Mark also co-founded Cheetah Development, a non-profit based on a novel method of funding, Micro-Venture Capital.\u003C\/p\u003E\n\u003Cp\u003EPresentation Description:\u003C\/p\u003E\n\u003Cp\u003EImproved filtration efficiency in HVAC filters is typically associated with increased filter pressure drop and correspondingly, increased energy costs to maintain the same system flow rate.\u00a0 Here, we show that appreciably enhanced filtration efficiencies without appreciably increased energy costs can be achieved through a combined filter unit wherein a pleated filter is mounted between sets of wire electrodes; with a high potential difference applied across electrodes upstream and downstream of the filter, incoming particles are ionized efficiently and consequently collected with a higher efficiency.\u00a0 We specifically demonstrate this approach by testing MERV 11 and MERV 15 filters placed between wire electrode arrays with 0-10 kV applied in an ASHRAE 52.2. test duct, at face velocities between 0.64 \u2013 1.91 meters per second.\u00a0 Size-dependent filtration efficiency is quantified through a combination of an optical particle spectrometer (0.3 \u2013 10 micrometers in diameter) as well as a scanning mobility particle spectrometer (10 nm \u2013 0.3 micrometers in diameter).\u00a0 With initial charge-neutralized challenge particles, we find without electric field implementation, both the MERV 11 and MERV 15 filters have collection efficiency minimums near 200-300 nm in diameter and for the MERV 11, the collection efficiency for the most penetrating size is below 50%.\u00a0 However, with 10 kV applied across electrodes, the collection efficiency for the most penetrating size for the MERV 11 filter increases to be above 90% for all tested flow rates and similar performance for both the MERV 11 and MERV 15 filters for submicrometer particles.\u00a0 To better understand the interplay between pressure drop and electrical energy required for operation, through these tests we also introduce a new figure of merit for HVAC control technologies, which is the product of the filtration efficiency and operating flow rate, divided by the sum of mechanical energy required for blower operation and the electrical power (voltage x current) for electrode operation.\u00a0 With units of volume of air cleaned per unit of energy expended, the highest figures of merit are obtained for the MERV 11 test filter with 7 kV of applied voltage.\u00a0 In total, our work demonstrates the synergistic effects of integrated filtration and active particle control.\u00a0 Enhanced filter performance with active particle control could\u00a0improve Indoor Air Quality with the resulting health and wellness benefits.\u00a0\u003C\/p\u003E\n\u003Cp\u003EUniversity of Minnesota, Mayo Clinic College of Medicine and Science, SecureAire Technologies.\u00a0\u003Cbr \/\u003E\n\u00a0\u003C\/p\u003E\n\u003C\/div\u003E \u003C\/div\u003E \u003C\/div\u003E\n \u003C\/div\u003E\n \n \n \n \n \n \n\u003C\/div\u003E"}]