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Articles 1 - 4 of 4
Full-Text Articles in Engineering
Active Membrane Energy Exchanger For Air Cooling And Dehumidification, Songhao Wu, Andrew Fix, David M. Warsinger, James E. Braun
Active Membrane Energy Exchanger For Air Cooling And Dehumidification, Songhao Wu, Andrew Fix, David M. Warsinger, James E. Braun
Discovery Undergraduate Interdisciplinary Research Internship
Heating, ventilation and air conditioning (HVAC) equipment consume 35% of total building energy use in the US, among which a large share is used for cooling and dehumidification. The majority of air dehumidification systems take the conventional approach of moisture condensation removal. It requires air to be cooled below its dew point temperature and is an energy-intensive process, especially for areas with hot and humid climates. Vapor selective membrane systems are promising alternatives for air dehumidification as they do not require cooling energy for latent (humidity) heat removal. It allows water vapor transport through the membrane while blocking air. Previous …
Stable Thermally-Modulated Nanodroplet Ultrasound Contrast Agents, Anastasiia Vasiukhina, Javad Estraghi, Adib Ahmadzadegan, Craig J. Goergen, Pavlov P. Vlachos, Luis Solorio
Stable Thermally-Modulated Nanodroplet Ultrasound Contrast Agents, Anastasiia Vasiukhina, Javad Estraghi, Adib Ahmadzadegan, Craig J. Goergen, Pavlov P. Vlachos, Luis Solorio
School of Mechanical Engineering Faculty Publications
Liquid perfluorocarbon-based nanodroplets are stable enough to be used in extravascular imaging, but provide limited contrast enhancement due to their small size, incompressible core, and small acoustic impedance mismatch with biological fluids. Here we show a novel approach to overcoming this limitation by using a heating–cooling cycle, which we will refer to as thermal modulation (TM), to induce echogenicity of otherwise stable but poorly echogenic nanodroplets without triggering a transient phase shift. We apply thermal modulation to high-boiling point tetradecafluorohexane (TDFH) nanodroplets stabilized with a bovine serum albumin (BSA) shell. BSA-TDFH nanodroplets with an average diameter under 300 nanometers showed …
Photocatalytic Inactivation Efficacy Of Sars-Cov-2 In Hvac Systems, Andrew J. Freeman, Sudharshan Anandan, Ernest R. Blatchley Iii, W. Travis Horton, David M. Warsinger
Photocatalytic Inactivation Efficacy Of Sars-Cov-2 In Hvac Systems, Andrew J. Freeman, Sudharshan Anandan, Ernest R. Blatchley Iii, W. Travis Horton, David M. Warsinger
Discovery Undergraduate Interdisciplinary Research Internship
The coronavirus pandemic has emphasized a need for robust and reliable air purification systems in buildings; with that comes a need for a standardized testing methodology for air purification technologies in HVAC air circulation systems. One such method of air purification is photocatalytic oxidation (PCO), a mechanism in which a catalyst irradiated by light produces reactive molecules that degrade a wide range of pollutants, including the aerosols that carry COVID. This technology has primarily been used in aqueous applications, but there have recently been developments in air purification that have made it a promising contender to existing technologies. One of …
Osmocean, Katie Brodersen, Alec Lanter, Maulee Sheth, Nathaniel Kiefer, Emily Bywater, Kumansh Furia, Brittany Cafferty, Hayden Schennum, Yi Xie, Abigail Werner, Deepika Ramchandani, Sandra Cordoba, Akshay Rao, Jun Chen, Abhimanyu Das, David M. Warsinger
Osmocean, Katie Brodersen, Alec Lanter, Maulee Sheth, Nathaniel Kiefer, Emily Bywater, Kumansh Furia, Brittany Cafferty, Hayden Schennum, Yi Xie, Abigail Werner, Deepika Ramchandani, Sandra Cordoba, Akshay Rao, Jun Chen, Abhimanyu Das, David M. Warsinger
School of Mechanical Engineering Working Papers
The objective of this Build & Test was to prove that the Osmocean wave-powered batch reverse osmosis (BRO) system is physically realizable. Through a comprehensive and systematic engineering process, the optimal components for the WEC-side Osmocean coupling were procured, assembled, and tested. The results indicate that a control effort developed for the main loop throttle valve successfully tracks input signals meant to simulate interaction with the BRO system to within 6% error. Future work will include developing a controller for the kidney loop throttle valve to assist in keeping the main loop flow rate constant as well as the direct …