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About This Item
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In order to simplify energy analysis of single-family dwelllngs, and to assess the effectiveness of retrofits, simplified average weather data is required. This paper analyzes weather data for seven Canadian cities and proposes a method of generalizing this data for use in variable base-degree day calculations.
Thirty-two years of hourly weather data for seven Canadian cities have been analyzed, and a normalized temperature distribution over a 12-month period has been developed. In order to use this normalized distribution, three temperatures for a specified location are required: Tmax, the highest monthly average temperature; Tmin, the lowest monthly average temperature; and Tavrg, the yearly average temperature.
Heating degree-days to any base temperature may be calculated or determined graphically based on the above three temperatures. Similarly, cooling degree-days may also be determined. Based on the degree-days, an approximate length of the heating or cooling season may be determined for a building with a known balance point temperature.
Units: Dual