ZEMCH 2019 International Conference Proceedings April.2020 | Page 167
Air Temp., RH (Interior) FHAD46C41A
Air Temp., RH (Perimeter) UX 100‐003
CO₂ concentration TELAIRE 7001
Occupancy Mobile Library App.
Instruments Position
2.2. TSV
To compare the PMV collected through measurements with TSV, questionnaires were provided at
the entrance of the room to allow an unspecified number of users to provide answers at any time. The
questionnaires were placed at the entrance of the hall so that the occupants could answer it at all times.
As shown in Figure 1, the questionnaire outlined the objective of the survey. The survey questions
inquire about thermal comfort (ASHRAE 7‐point scale), sex, seating location (window or inner part),
the time at which the occupant entered the room, and the time at which the occupant took the survey.
As an insufficient amount of data were collected, analysis by sex or time of occupancy was not
conducted.
Figure 1. TSV Questionnaire
Humphreys et al. utilized a bias index of TSV subtracted from PMV to assess the prediction
capacity of PMV [4]. When the bias is positive, the occupant feels a cooler thermal sensation than PMV,
while the opposite would indicate the occupant feels warmer thermal sensation. The larger the absolute
value of bias, the lower the prediction capacity of PMV. In this study, the difference between PMV and
TSV was referred to as Dv, and to assess whether the density of carbon dioxide is related to TSV, the
collected Dv was compared for each carbon dioxide concentration segment.
TSV Analysis on Changes in the Carbon Dioxide Concentration in a University Library Reading Room
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