Abstract
Ventilation or filtration control is widely applied to improve indoor particle matter (PM) concentration. Adjusting the ventilation rates to control indoor PM levels can affect the concentration of other indoor pollutants and energy costs, and increasing the filtration flow rate can lower the indoor PM concentration, but also increase the fan energy consumption. In this study, we developed a ventilation and filtration control strategy to determine the optimal control mode and flow rate of the system to meet indoor PM (especially PM2.5) concentration, ensure adequate indoor air quality (IAQ), and minimize fan energy consumption. First, a dynamic model to estimate the indoor PM2.5 generation rate was developed based on the mass balance model and then verified by experiments. Next, the control limit (CL) curve was developed on the basis of the indoor PM2.5 characteristics depending on ventilation and filtration control during various indoor and outdoor PM2.5 conditions (indoor PM2.5 generation rate and outdoor PM2.5 concentration). In addition, an algorithm was proposed to determine the optimal control mode and flow rate of the system. Condition zone control can keep indoor PM2.5 below or as close to the desired target concentration as possible, maintain IAQ within acceptable ranges, and save about 15~70% of fan energy compared with the conventional rule-based control under the case condition.
Highlights
Particle matter (PM) has been identified as an important cause of various diseases, including asthma, lung cancer, cardiovascular disease, and coronary heart disease [1,2,3]
For the conventional control case, the outdoor PM2.5 concentrations were less than 50 μg/m3 all day, so the ventilation control was applied for 24 h
Curve was proposed to determine optimal ventilation and filtration operation modes and set-point flow rate depending on the outdoor PM2.5 concentration and the indoor PM2.5 generation rate
Summary
Particle matter (PM) has been identified as an important cause of various diseases, including asthma, lung cancer, cardiovascular disease, and coronary heart disease [1,2,3]. 2.5 μm in aerodynamic diameter (PM2.5) have a larger surface area than coarse particles and are more likely to adsorb harmful substances such as heavy metal elements on the surface while staying in the atmosphere for a long time [4]. Ventilation or filtration control has been widely applied to improve indoor PM concentration from indoor and outdoor sources [7,8,9,10,11,12,13,14]. Ventilation is defined as the process by which outdoor and indoor air is exchanged through mechanical ventilation systems. Outdoor PM2.5 is removed by a ventilation filter before it flows into the room. Filtration is defined as the process by which indoor air is recirculated and indoor PM2.5 is removed by filtration filter.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
