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一、采暖度日数与采暖期度日数的区别欧美、日本等国常采用采暖度日数(简称度日数或度天值)这一概念。他们的采暖度日数是这样统计的:某日的度日数等于该日的室外日平均温度与室内基准温度18℃之间的温差值与这1天的乘积。室内基准温度取18℃不变,若某日的室外日平均温度为18℃,则该日的度日数D_(db)=[18-18]×1=0℃·d(度·日);若某日的室外日平均温度为0℃,则该日的度日数D_(db)=[18-0]×1=18℃·d;若某日的室外日平均温度为-10℃,则该日的度日数D_(db)=[18-(-10)]×1=[18+10]×1=
First, the difference between the number of days of heating degree and the number of days of heating period: Europe, the United States, Japan and other countries often use the concept of heating degree days (referred to as degree days or degree days). The number of days for their heating degrees is calculated as follows: The number of days on a given day is equal to the product of the temperature difference between the outdoor daily average temperature on that day and the indoor reference temperature of 18°C, and the product of this one day. The indoor reference temperature is set to 18°C, and if the daily average outdoor day temperature is 18°C, the number of days of the day D_(db)=[18-18]×1=0°C·d (degree·day); If the daily average outdoor day temperature is 0°C, the number of day days D_(db)=[18-0]×1=18°C·d; if the daily outdoor average day temperature is -10°C, then The number of days of the day D_(db)=[18-(-10)]×1=[18+10]×1=