Ground Thermal Diffusivity Calculation by Direct Soil Temperature Measurement. Application to very Low Enthalpy Geothermal Energy Systems.
Ground Thermal Diffusivity Calculation by Direct Soil Temperature Measurement. Application to very Low Enthalpy Geothermal Energy Systems.
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DOI：
10.3390/s16030306
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发表时间：
2016-02-29
期刊：
影响因子：
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通讯作者：
Gómez Melgar S
中科院分区：
文献类型：
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作者：
Andújar Márquez JM;Martínez Bohórquez MÁ;Gómez Melgar S
本文提出了一种方法和仪器系统，通过测量给定深度的土壤温度来间接测量该深度的土壤热扩散率。这项开发是考虑到其在极低焓地热能 (VLEGE) 系统的设计和规模确定中的应用，但它还可以有许多其他应用，例如建筑、农业或生物学。该方法简单且廉价，因为它可以在建造房屋或建筑物之前利用规定的岩土钻孔，同时进行温度测量，从而获得感兴趣深度的实际温度和地面热扩散率。该方法和开发的系统已经过测试，并用于设计韦尔瓦（西班牙西南部城市）郊区带地下室小屋的 VLEGE 设施。实验结果验证了所提出的方法。
This paper presents a methodology and instrumentation system for the indirect measurement of the thermal diffusivity of a soil at a given depth from measuring its temperature at that depth. The development has been carried out considering its application to the design and sizing of very low enthalpy geothermal energy (VLEGE) systems, but it can has many other applications, for example in construction, agriculture or biology. The methodology is simple and inexpensive because it can take advantage of the prescriptive geotechnical drilling prior to the construction of a house or building, to take at the same time temperature measurements that will allow get the actual temperature and ground thermal diffusivity to the depth of interest. The methodology and developed system have been tested and used in the design of a VLEGE facility for a chalet with basement at the outskirts of Huelva (a city in the southwest of Spain). Experimental results validate the proposed approach.