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ASSIGNMENT 2: UNDERSTANDING WIND PATTERNS IN PASSIVE DESIGN
CLIMATE ANALYSIS
ASSIGNMENT 2: UNDERSTANDING WIND PATTERNS IN PASSIVE DESIGN
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SIMULATION 1 Location: St. Louis, MO Date: January 21 Wind Speed: 4.20 m/s Temperature: 0° C Wind Direction: Originate from West Efective Roughness Height: Suburb SIMULATION 2 Location: St. Louis, MO Date: April 21 Wind Speed: 3.89 m/s Temperature: 20.6° C Wind Direction: Originate from West Efective Roughness Height: Suburb
SIMULATION 3 Location: St. Louis, MO Date: July 21 Wind Speed: 2.64 m/s Temperature: 31.1° C Wind Direction: Originate from South Efective Roughness Height: Suburb SIMULATION 4 Location: St. Louis, MO Date: October 21 Wind Speed: 3.71 m/s Temperature: 18.3° C Wind Direction: Originate from South Efective Roughness Height: Suburb
CONDITION 1 Operative Temp: 74 °F Air Speed: 20 fpm Relative Humidity: 50% Metabolic Rate: 1 met Clothing Level: 1 clo CONDITION 2 Operative Temp: 85 °F Air Speed: 300 fpm Relative Humidity: 75% Metabolic Rate: 1.5 met Clothing Level: 0.5 clo
Comparison of Condition 1 to Condition 2: Although both Condition 1 and Condition 2 comply with the ASHRAE 55 Standard, Condition 1 is more desirable. The PMV for Condition 2 is 0.38 higher and the PPD for Condition 2 is 3% greater. This number comparison indicates that a higher number of people will be comfortable in Condition 1, even though Condition 2 still complies with ASHRAE 55.
CONDITION 3 Operative Temp: 51 °F Air Speed: 40 fpm Relative Humidity: 15% Metabolic Rate: 2 met Clothing Level: 1.4 clo CONDITION 3: improved Operative Temp: 51 °F Air Speed: 40 fpm Relative Humidity: 15% Metabolic Rate: 2 met Clothing Level: 1.5 clo
Improving Condition 3: While the original Condition 3 (above left) does not comply with the ASHRAE 55 Standard, by adding 0.1 clo to Clothing Level, Condition 3: improved (above right) will fall within the comfort zone.
