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根据采暖地区的气象资料,用采暖累计小时数∑T_n与采暖室外计算温度t_w为座标,可以画出采暖负荷小时曲线(∑T_n—t_w曲线)。图1是天津市区采暖季的负荷小时曲线。在单位建筑面积热负荷q确定后,由∑T_n—t_w曲线与座标轴间包括的面积,可求出一个采暖季中,每平方米建筑面积所需的总热量。从图1可见,在室外温度t_w较低的高峰负荷时,采暖累计小时数较小,而单位面积需供的热量较大,如全靠地热(或工业余热)采暖,地热井供应的采暖建筑面积就会减小,地热利用率降低。为提高地热利用
According to the meteorological data of the heating area, the heating load hour (T_n_t_w curve) can be drawn by using the accumulated heating hours ∑T_n and the heating outdoor temperature t_w as coordinates. Figure 1 shows the load hour curve for the heating season in Tianjin. After the heat load q of the unit building area is determined, the total heat required per square meter of building area during a heating season can be obtained from the area included between the ∑T_n-t_w curve and the coordinate axis. It can be seen from Figure 1 that when the outdoor temperature t_w is lower than the peak load, the accumulated hours of heating are small, and the amount of heat required per unit area is large, such as heating by geothermal (or industrial waste heat), and heating construction supplied by geothermal wells. The area will be reduced and the utilization of geothermal energy will be reduced. To increase geothermal utilization