2016 ASHRAE Winter Conference

A number of studies reported associations between ground-level ozone and various adverse health effects, including respiratory and cardiovascular diseases. Indoor ozone is also a significant initiator of indoor chemistry by driving various oxidative processes which produce many harmful oxidation products. Hence ozone is the required challenge gas with respect to oxidizing gases to be tested in AHSRAE Standard 145.2-2011. In practical application, how often the filters should be changed on specific operation condition is a key question. Wheeler-Jonas equation is widely used for describing breakthrough curves of VOCs removal by granular activated carbon (GAC).  This paper will investigate the applicability of W-J equation to the oxidizing gas - ozone. The experiments will be conducted on a state-of-the-art full-scale filter test rig. The air tightness, uniform distribution of challenge gases and stable temperature and humidity control of the test rig have already been validated. Commercially available AC filters with different pore sizes, specific areas and bulk densities will be tested.

Institutional campuses often times encompass both centralized and decentralized heating and cooling systems. Each configuration inherently has advantages and challenges when trying to maintain occupant comfort while minimizing energy consumption.  Recent technological advancements in computing power allows building energy modelers to quickly and efficiently develop models which can be evaluated as part of a centralized plant or as a stand alone system.