Experimental study of local thermal comfort and ventilation performance for mixing, displacement and stratum ventilation in an office

Adaptive Wall-Based Attachment Ventilation: A Comparative Study on Its Effectiveness in Airborne Infection Isolation Rooms with Negative Pressure

“…It has also been reported that variation occurs in removal efficiencies according to the ACHs of other air distribution modes, such as displacement ventilation and stratum ventilation. Tian et al [62] found that the removal efficiencies were 1.10–1.49 when the ACHs were 2.2–4.7 h –1 . Mateus and da Graça [63] tested the removal efficiencies of displacement ventilation and found that the average value was 1.7 when the ACH was 4.4 h –1 .…”

Improving predicted mean vote with inversely determined metabolic rate

“…Using the information entropy analysis of a large database, Jing et al [40] found that the physiological adaptation was linearly related to the indoor air temperature approximately. Since the air velocity (> 0.2 m/s) also has cooling effects [41] and is encouraged for the thermal preference and energy saving [6], Equation 1 correlates the metabolic rate to both the room air temperature and velocity linearly. Equation 1 is also consistent with Fanger and Toftum [5].…”

Optimization of air supply parameters for stratum ventilation based on proper orthogonal decomposition

“…According to their results, the particle concentrations in the room overall and in the breathing zone under stratum ventilation were lower than those under displacement ventilation; as a result, the risk of particulate matter inhalation, and thus of pathogen inhalation, is lower under stratum ventilation. Tian et al (2019) studied the ventilation characteristics of stratum ventilation, displacement ventilation and mixed ventilation. They found that stratum ventilation can ensure good air quality for indoor occupants, with better contamination exclusion than that provided by mixed ventilation or displacement ventilation.…”