THESIS
2014
ix, 79 pages : illustrations ; 30 cm
Abstract
Since people spend more than 80% of their lives in buildings or other enclosures, comfortable
indoor environments are essential in sustaining the quality of life and saving energy.
Personalized ventilation can control personal surrounding temperature to provide comfort for
everyone with minimal energy consumption. It is especially applicable in modern dense office
buildings. However, one of the key issues with personalized ventilation is how to detect each
person's thermal comfort, and according to their demand of thermal sensation automatically
provide a comfortable environment. It requires an effective and easy-to-use tool to measure
thermal sensation. According to Fanger's predicted mean vote model, people's metabolic rate
has a significant impact on their thermal comfort. Bu...[
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Since people spend more than 80% of their lives in buildings or other enclosures, comfortable
indoor environments are essential in sustaining the quality of life and saving energy.
Personalized ventilation can control personal surrounding temperature to provide comfort for
everyone with minimal energy consumption. It is especially applicable in modern dense office
buildings. However, one of the key issues with personalized ventilation is how to detect each
person's thermal comfort, and according to their demand of thermal sensation automatically
provide a comfortable environment. It requires an effective and easy-to-use tool to measure
thermal sensation. According to Fanger's predicted mean vote model, people's metabolic rate
has a significant impact on their thermal comfort. But in conventional application, a person's
metabolic rate is assumed to be constant because of the high cost and inconvenience of
monitoring an individual’s metabolic rate. In this study, a portable device was developed for
human metabolic rate, heat loss measurement and thermal comfort estimation. Heart rate as a
direct function of oxygen demands for metabolism was measured to calculate the metabolic
rate. And the heat loss from skin to environment was measured to improve the accuracy of
metabolic rate calculation from heart rate. An aspirating system was designed to measure the
overall heat loss including the insensitive and sensitive perspiration effect on the skin.
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