Page 5 - PowerPoint Presentation

b. What is the most effective passive
3. Observe the psychrometric chart and answer
the following strategy for your location?

a. By default, how many comfortable hours are

there in the location?

4. Explain what is ‘wet bulb depression’ 5. What is the adaptive thermal comfort

in our own words model? Why should we use it?
A psychrometer is a hygrometer composed of two similar The adaptive thermal comfort model saves more energy in
thermometers. The bulb of one thermometer is kept wet (by buildings that are naturally ventilated when compared to air
means of a thin, wet cloth wick) so that the cooling that
conditioned buildings as residents adjust to wider indoor
results from evaporation makes it register a lower temperatures than the peripheral thermal comfort zones
temperature than the dry-bulb thermometer.
determined by the PMV model.
When readings are taken simultaneously, it is possible (with The objective of this study is to identify the main sources of
the use of psychrometric tables) to determine the relative uncertainty around application of adaptive models and to analyze
humidity and dew-point temperature of the air. A decrease in
quantitatively the difference between the adaptive comfort models
the humidity of the air brings an increase in the difference proposed by the regulatory documents when applied across a
between dry- and wet-bulb temperatures called the wet-bulb
spectrum of different climate zones.
depression.