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Research topics:
Weihua has been doing research on effects of temperature, relative humidity, and air flow on microbial growth on loaded filters. The effects of variable temperature versus constant temperature, variable relative humidity versus constant humidity, and static air versus air flow will be investigated.
Email: whtang@me.umn.edu
Office: ME 362
Lab: ME 357
Homepage:
Research topics:
Meng's research includes two parts, the first
one is about intergrated building systems for energy efficiency and renewable
technologies. He has determined the most energy efficient and cost effective
combination of architectural elements and mechanical systems to specify in
an Minneapolis office building while maintaining a comfortable and healthy
indoor environment for the occupants.
The current project is to numerically determine the collision efficiencies for the electroscavenging of aerosol particles by droplets. Cloud particles fall through a population of atmospheric aerosol particles which collide with the cloud particles and fall to the ground. This phenomenon is defined as "scavenging" and can be used as a way of pollutant control. When the two particles have opposite charge, the attraction caused by the electrostatic force can greatly increase the collection efficiency. In this study, a model has been developed to predict the collection efficiencies of electroscavenging for the larger collector droplets and the small aerosol particles.
Email: mzhang@me.umn.edu
Office: ME 362
Lab: ME 362
Homepage:www.menet.umn.edu/~mzhang
Research topics:
Nick's research project involves bioaerosol sampling by means of filtration, to determine normal background concentrations, of selected bacteria and virus aerosols in buildings in the United States, at selected locations. Ventilation filters are removed from air handling units within large public buildings to be analyzed for harmful bioaerosols. These filters are basically being used as passive high volume air samplers for bioaerosol particles. This data is time integrated over 3 month periods, as we are sampling for each season out of the year. After the filters have been removed, samples are cut from each filter. These samples are then eluted to remove any bacteria and/or viruses from the filter media. The bacteria is cultured on growth plates or identified by Polymerase Chain Reaction (PCR) methods. The viruses are analyzed using PCR methods or egg inoculation methods to see if they are viable. After the bacteria and viruses have been detected, comparisons will be able to be made between locations and seasons. The virus and bacteria detection and identification is done by researchers at the Department of Environmental Health and the Veterinary Diagnostics Laboratory in St. Paul.
Email: stan00332@umn.edu
Office: ME 362
Lab: ME 362
Homepage:
Research topics:
Josh's research done has been to develop a standard method of test for commercial kitchen ventilation system filters. The project began with fully characterizing and calibrating the test kitchen, including the makeup air system, the electric griddle, and the exhaust air system. Phase Two of the project consisted of determining the fractional efficiency of a set of generic baffle filters using particulate from cooked hamburgers. Once the cooking tests were finished, a suitable surrogate to the hamburgers was determined, and the final test procedure was finalized and tested. The standard has since been adopted by ASTM under the designation F2519-05. The research conducted now consists primarily of outsource filter testing for interested parties.
Email: rock0105@umn.edu
Office: ME 362
Lab: ME 362
Homepage: www.menet.umn.edu/~rocklage
