Evaluation of Ground Temperature Changes by the Operation of the Geothermal Heat Pump System and Climate Change in Korea
Evaluation of Ground Temperature Changes by the Operation of the Geothermal Heat Pump System and Climate Change in Korea
复制标题
韩国地热热泵系统运行引起的地温变化和气候变化的评估
DOI：
10.3390/w12102931
复制
发表时间：
2020
期刊：
影响因子：
3.4
通讯作者：
Youngmin Lee
中科院分区：
文献类型：
--
作者：
Seong;Youngmin Lee
为了评估地热热泵（GHP）系统运行引起的长期温度变化，对韩国地热热泵系统的井眼热交换器（BHEs）附近的温度进行了测量。温度测量结果显示，在10 m深度和50 m深度的温度分别以0.135°C/年和0.118°C/年的速率增加了约10年。分析气候变化对测量到的温度波动的影响的模拟表明，在50米深处，由于地表气温的变化，温度的上升速度为0.010°C/年。二维换热模拟结果表明，在近10年的时间里，冷却季16.7 W/m的排热量和采暖季12.4 W/m的排热量可导致年平均气温升高0.109℃。此外，假设GHP系统保持其运行水平，对未来地温预测的模拟结果表明，2050年50 m深处的温度将比2005年增加约3.00°C。因此，通过考虑气候变化来平衡向地下排放和从地下提取的热量，以尽量减少地温的长期变化是必要的。
To evaluate long-term temperature changes caused by the operation of a geothermal heat pump (GHP) system, temperatures near borehole heat exchangers (BHEs) of the GHP system in Korea were measured. The temperature measurements showed increasing rates of 0.135 °C/year at a depth of 10 m and 0.118 °C/year at a depth of 50 m for approximately 10 years. Simulations for the analysis of climate change effects on measured temperature fluctuations showed that a rate of temperature increase was 0.010 °C/year at a depth of 50 m owing to changes in surface air temperatures (SATs). From two-dimensional heat transfer simulations, the discharged heat measuring 16.7 W/m in the cooling season and extracted heat measuring 12.4 W/m in the heating season could cause an annual mean temperature increase of 0.109 °C over approximately 10 years. Additionally, results of simulations for future prediction of ground temperatures assuming that the GHP system retains its level of operation showed that in 2050, temperature at a depth of 50 m will increase by approximately 3.00 °C from that in 2005. Thus, balancing the heat discharged into and extracted from the ground by considering climate change to minimize long-term changes in the ground temperature is necessary.