Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
A Novel Pathogen Reduction System for Low Ventilation Environments
Tom Dunbar1, Francine Battaglia2
1uvcPhyzx Corp, New York; 2University at Buffalo, New York
The need for creating healthy living and working spaces within buildings has become a pressing issue, as evidenced from the COVID-19 pandemic. A novel approach is to reduce pathogen aerosol transmission through high photon density ultraviolet-C (UVC) inactivation air sanitization devices. A combination of prototype experiments and computational fluid dynamics (CFD) are being used to assess the UVC devices in possible room configurations to create clean air zones within occupied interior environments.
uvcPhyzx has developed and is in a pilot production stage of an energy efficient approach for improving indoor air quality, which reduces the requirement of exterior air exchanges while maintaining overall ACH specifications. The uvcPhyzx device creates air flow patterns that process the higher concentration pathogen laden air from along the floor of gathering spaces. The shed pathogens are drawn down and away from other occupants into the sanitization system with clean air returned into the environment targeting typical occupant locations.
CFD studies supported by a New York State Office of Science and Technology and Academic Research (NYSTAR) agreement between the Department of Mechanical and Aerospace Engineering at the University at Buffalo and uvcPhyzx Corporation will demonstrate clean air zones created by uvcPhyzx air sanitization devices in a variety of commercial and social gathering spaces.
An overview of the patent pending uvcPhyzx device utilizing the novel concept of photon density within the illumination chamber at a high number of inactivation attack angles will be described.
Lesson Learned in Building Systems Design and Operation for Airborne Contaminant Control
Douglas Bryan Cage
Mason and Hanger, United States of America
The 2020 COVID-19 pandemic raised new awareness and concern towards human safety in regard to building HVAC systems and their ability to control (or distribute) airborne contaminants. The author wishes to share lessons learned from decades of design, construction, and operational experience with tiered building pressurization systems in facilities specifically designed to minimize the distribution of such contaminants. The intent is to shine a light for owners, operators, architects and engineers considering such issues in the design of HVAC systems in new facilities that may not have previously included such systems. The discussion will expand on the common concepts of general building pressurization (e.g., for mitigating infiltration) to share issues (e.g., modeling, distribution, control, filtration, etc.) to consider while designing for control of contaminant distribution. The future may warrant consideration of these concepts--some familiar in hospital design--into facilities within which they had not previously been considered.