標準號：BS EN 61725-1997
中文標準名稱：每日太陽外形分析表達
英文標準名稱：Analytical expression for daily solar profiles
標準類型：F12
發布日期：1997/12/15 12:00:00
實施日期：1997/12/15 12:00:00
中國標準分類號：F12
國際標準分類號：27.160
適用范圍：This procedure provides a normative equation for analytically deriving a set of data points or a curve of irradiance versus time of day for a synthetic solar day. The coefficients of the normative equation for the analytical solar irradiance profiles are determined from measured or estimated values of maximum solar irradiance, daily solar irradiation and the number of daylight hours. These three input data define the curve of the analytical solar irradiance profiles. Depending on the objectives, these data may represent, for example, the worst winter day of a certain place, or the average day of a summer season, etc. CAUTION - While the results from the normative equation match measured clear sky data reasonably well, it is not intended to predict or simulate a real day. A daily solar irradiance profile is defined based on user-selected values for peak irradiance, daily irradiation and total daylight hours.