lecture - Feb 8th Troy Kimmel Lecture

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Temperature Data/Uses o Temperature data is gathered at 1000s of stations worldwide on an hourly basis o Specific Uses: Hourly temperatures Max and min daily temperatures Extreme record high/low temperatures Heating/cooling/growing degree days Daily average temp Daily temp range Monthly average temp Annual avg temp Annual temp range Heating/cooling degree days o HDD/CDDs developed by heating engineers (energy related operations) in the early 20 th century o HDD/CDDs are a practical method of evaluating energy demand and consumption o Based on the assumption that heating/cooling in buildings is NOT required where the daily mean temp is 65F/18.3C o HDD/CDDs are cumulative (annually) o To compute High for day+low for day. .div by 2 Compare to base temp 65F Deviation either heating or cooling o HDD/CDD seasons: CDD season – January through December HDD season – July 1 through June 30
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For Austin Avg annual HDD: 1185 Avg annual CDD: 3375 o Biometeorological applications: Heat stress index Developed by RG steadham in 1983 Two factors: Temperature and Humidity Based on evaporative cooling process o Wind Chill Index Developed for polar scientists in 1940s
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This note was uploaded on 02/13/2011 for the course GRG 301K taught by Professor Kimmel during the Spring '08 term at University of Texas at Austin.

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lecture - Feb 8th Troy Kimmel Lecture

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