【摘要】 利用2012年10月~2013年9月格尔木大型光伏电站内外一整年的观测资料,对比分析光伏电站内外的土壤温度变化特征。结果表明:在土壤浅层(5、10 cm),光伏电站内外土壤温度日变化差异明显。5 cm层土壤温度日最大值相差9.7℃,土壤温度日较差站内明显低于站外,光伏装置具有绝热保温作用。站内5~180 cm各层土壤温度年较差均大于站外;在冬季,站外各层土壤温度均明显高于站内,光伏电站是冷源。在2012年10月~次年3月,站内5~80 cm各层土壤日平均温度显著低于站外。更多还原

【Abstract】 Based on the field observation data inside and outside of the large scale PV farm in Golmud desert area from October 2012 to September 2013,the varying characteristics of soil temperature inside and outside of PV farm were compared and analyzed.The results show that there are significant differences of diurnal variations of soil temperatures in the depth of 5 cm and 10 cm inside and outside of PV farm,the daily maximum difference value of the soil temperatures of two sites in the depth of 5 cm is 9.7 ℃,the daily variation range of soil temperature in the depth of 5 cm and 10 cm in the solar PV farm is lower than that outside region of PV farm,therefore the solar PV arrays have the thermal insulation performance.The annual range of soil temperature in the different depth of 5-180 cm in the solar PV farm is larger than that of corresponding depth outside region of PV farm,the soil temperature in different depths in winter in the solar PV farm are lower than that outside of PV farm obviously,so the PV farm is a cooling system.The daily mean temperature in the depth of 5-80 cm soil from October 2012 to March 2013 is obviously lower than that outside region of PV farm.更多还原