Closed-loop geothermal systems (CGSs) represent an effective means of extracting low-
grade thermal energy from hot dry rock (HDR). Thus far, there has been much debate on …

As a safe and efficient source of clean energy, medium-deep geothermal energy has been
widely used in building heating. The medium and deep borehole heat exchanger (MDBHE) …

Recently, it was reported a novel method of deep geothermal energy exploitation by using
the super-long gravity heat pipe (SLGHP) in a single-well geothermal system. However, the …

Geothermal energy is a reliable, environmentally friendly resource efficiently transformed to
other energy forms without any storage. Therefore, it has taken the attention of many …

The deep borehole heat exchanger (DBHE) is an essential component of medium-depth
geothermal heat pump systems (MD-GHPs). Compared with the conventional borehole heat …

The medium and deep U-type borehole heat exchanger (MDUBHE) coupled with ground
source heat pump systems has recently received extensive attention as a novel closed-loop …

The medium and deep U-type borehole heat exchanger (MDUBHE) system is a novel
technology to extract deep geothermal energy for building heating. The thermal performance …

In recent years, deep geothermal energy has become a solid option for building heating
worldwide. For the densely populated urban area, a novel closed-loop system of the deep U …

Medium and deep U-type borehole heat exchanger (MDUBHE) coupled with ground source
heat pumps is a novel technique to extract geothermal energy from deep rock and soil. The …

Deep borehole heat exchanger (DBHE), whose depth can reach hundreds even thousands
of meters, has large and stable heat extraction capacity and is thus expected to be a …