UFC 3-400-02

28 FEBRUARY 2003

2-6

2-5 through 2-9 are examples of Data Set Pages 5 through 9, respectively. These

tables show the number of hours that temperatures occur in 5 Fahrenheit degree (3

Celcius degree) bins of specific 8-hour daily periods during a given month. The 8-hour

periods are based upon a 24-hour clock and displayed in Local Standard Time (LST).

For each month, the number of observations for each temperature bin during each of

the specific 8-hour periods of the day appear in a column under the specific Hour

Group (LST). The total number of observations (hours) in each temperature bin is

displayed in the "Total Obs" column for the month. The mean coincident wet bulb

temperature is the mean value of all those wet bulb temperatures that occur

coincidentally with the dry bulb temperatures in the particular 5 temperature bin. At the

upper, or warmer, end of the mean coincident wet bulb distribution, the values

occasionally reverse their trend because the highest wet bulb temperatures do not

necessarily occur with the highest dry bulb temperatures. There are 13 such tables,

one for each month and one representing the overall annual summary (Data Set Page

9).

2-6.1

technical disciplines for different purposes. They are useful in making informal

estimates of energy consumption by cooling and heating equipment, and for gaining a

general understanding of patterns of temperature and moisture at different times of the

day, month, and year.

NOTE: Do not use these binned summaries to calculate design moisture loads.

2-6.2

temperature. After each observation has been placed into a dry bulb bin, the average

humidity ratio is calculated for all observations in each bin. Consequently, dry bulb bins

underestimate the magnitude of dehumidification and humidification loads because the

averaging calculation "flattens" the peaks and valleys of humidity ratios. The amount of

the underestimation varies according to the intended humidity control level.

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