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(本简评企图说明为什么地下是一个重要的但极被忽视的资源)。·能量储蓄·温度的季节性变化随深度增加衰减很快,大约在地表下5—10米处就达到终年恒定的温度,这温度接近地表的年平均温度。加之地层有很高的储热(及储冷)容量,这提供了大大地减少用于建筑物的供热和降温的燃料的可能,在美国目前这些燃料占燃料消耗总量的四
(This review attempts to explain why underground is an important but extremely neglected resource). • Energy savings • Seasonal changes in temperature decay rapidly with increasing depth, reaching a constant temperature throughout the year at about 5-10 meters below the surface, which is close to the annual mean surface temperature. In addition, the formation has a high capacity for heat storage (and cold storage), which provides the possibility of greatly reducing the heating and cooling of fuel used in buildings, which currently account for four of the total fuel consumption in the United States.