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24 Cards in this Set
- Front
- Back
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ASHRAE |
American Society of Heating Refrigerating and Air Conditioning Engineers |
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Comfort Air Speeds |
0.15 m/s (30fpm) 0.2 m/s (40 ft/min) |
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Calculating basis for determining the cooling effect of air movement |
Standard Effective Temperature (SET) |
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Environmental Factors |
•Temperature •Thermal Radiation •Humidity •Air Speed |
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Personal Factors |
•Activity •Clothing |
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A model that relates indoor design temperatures or acceptable temperature ranges to outdoor meteorological or climatological parameter |
Adaptive Model |
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The rate of air movement at a point without regard to direction |
Air Speed |
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A unit used to express the thermal insulation provided by garments & clothing ensembles |
Clo |
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That condition of mind that expresses satisfaction with the thermal environment and is assessed by subjective evaluation |
Thermal comfort |
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The unwanted local cooling of the body caused by air moist, environment, thermal. The characteristics of the environmental |
Draft |
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Moisture content of the air that affect a person's heat loss |
Humidity |
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An environmental substantial majority of the occupants would find thermally acceptable |
Acceptable thermal environment |
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A single piece of clothing |
Garment |
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The ratio of the mass of water vapor to the mass of dry air in a given volume |
Humidity Ratio |
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Ratio of partial pressure of water vapor in the air to the saturation pressure (or density) of water vapor at the same temperature & the same total pressure |
Relative Humidity |
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The resistance to sensible heat transfer provided by a clothing ensemble, expressed in clo |
Insulation, clothing/ensemble |
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The increase resistance to sensible heat transfer, obtained from adding an individual garment over nude body |
Insulation, garment |
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A unit used to describe energy generated inside the body due to metabolic activity |
Met |
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The rate of transformation of chemical energy into heat & mechanical work by metabolic activities within an organism |
Metabolic Rate |
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Spaces where the thermal conditions of the space are regulated primarily by the opening & closing or windows by the occupants |
Naturally conditioned spaces, occupant controlled |
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The indoor thermal index value corresponding with a mean vote of neutral on the thermal sensation scale |
Thermal neutrality |
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Percent of people predicted to be dissatisfied due to total discomfort |
Percent Dissatisfied |
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An index that predicts the mean value of the votes of a large group or persons on the seven point thermal sensation scale |
Predicted mean vote |
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An index that establishes a quantitative prediction of the percentage of thermally dissatisfied people determined from PMV |
Predicted Percent of Dissatisfied |
