光纤测温技术在地温场监测中的应用

Application of Optical Fiber Temperature Measuring Technique in Monitoring Ground Temperature Field

换热功率计算通常采取热响应试验的方式,仅仅通过热响应试验方式无法直观反映地下不同介质换热性能的差异,光纤测温系统恰恰能弥补这种不足。光纤测温监测与热响应试验相结合这种新技术的应用,在黄泛平原尚属首次,论文通过热响应试验期间的光时域光纤监测,取得了翔实数据的基础上,对比分析了不同岩土层介质的换热性能,采取了光纤地温测量这种新型监测手段,对换热试验前及试验期间地温场变化进行了监测,对合理利用浅层地温能这种新能源提供了参数支持。

Thermal response test is usually used in heat power calculation.Only thermal response test can not directly reflect the differences on the heat exchange performance of different media.Optical fiber temperature measuring system can make up the shortage.The combination of optical fiber temperature monitoring and thermal response test is firstly used in the Yellowish plain.In this paper,detailed data has been obtained through optical time domain(OTD)fiber optics detection during the TRT.Based on detailed data,the heat transfer performance of different rock soil layers has been compared and analyzed.Ground temperature changes before and during the heat exchange test have been monitored by using the new monitoring.It will provide the parameter support for rational utilization of shallow geothermal energy.