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北京市朝阳区粮食局地下食油库面积418平方米,离地8米深,备有五个大型油罐,可贮存食用花生油25吨。地下油库温度较低,夏天仅13～14℃,而油库需要保持在18℃以上,过去每天要烧煤半吨为它供暖。1980年6月这里建造了一座采光面积为51平方米的太阳能热水器,它与地下油库原有的29组暖气片及4条管道连通,由两台水泵使系统进行强迫循环,用太阳能为地下油库供热,效果良好。1980年6月至10月的测试结果表明,油库温度能
Chaoyang District, Beijing, underground food oil storage area of 418 square meters, 8 meters above the ground, with five large tanks, can store 25 tons of edible peanut oil. The temperature of the underground oil depot is low, and it is only 13 to 14°C in summer, and the oil depot needs to be maintained at more than 18°C. In the past, half a ton of coal was used to heat it daily. In June 1980, a solar water heater with a lighting area of 51 square meters was built here. It is connected to 29 sets of radiators and 4 pipes in the underground oil depot. Two pumps are used to force the system to cycle, and solar energy is used for underground oil depots. Heating, good results. The test results from June to October 1980 show that the temperature of the oil depot can be