Indoor environment and adaptive thermal comfort models in residential buildings in Tianjin, China

Song, Yangrui; Sun, Yuexia; Luo, Shugang; Hou, Jing; Kim, Jungsoo; Parkinson, Thomas; de Dear, Richa , Procedia Engineering ,205(2017), 1627-1634

This paper investigates air-conditioning (AC) usage patterns and adaptive comfort behaviors in a Chinese residential context. Field measurements were conducted in 43 homes in Tianjin from May 14th to November 20th in 2016. Indoor temperatures and AC on/off events were recorded. Occupants’ “right-here-right-now” thermal perception and adaptive behaviors were collected. 4,743 AC events and 1,697 online comfort questionnaires were collected. Average duration for AC cooling events in summer was 3.24 hrs per house and the average duration for AC heating events in winter was 0.96 hrs per house. Tianjin residents were less sensitive to indoor air temperature, compared to those in offices. The indoor temperatures corresponding to 80% thermal acceptability ranged from 21.0℃ to 27.3℃. We also derived statistical models to predict the likelihood of adaptive behaviors (i.e. turning on AC, turning on fans and opening windows or doors) with regard to outdoor air temperatures.

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