Performance Evaluation and Comparison Between Conventional U-Tube and New Kelix Tube-in-Tube Ground Heat Exchangers and Between Regular Grout and Supergrout

地源热泵，也被称为地源热泵（GSHP），是一种高效的可再生能源技术，在住宅和商业建筑中得到了广泛的接受。地源热泵用于空间加热和冷却，以及水加热。这项技术基于这样一个事实，即地球（地表以下）全年保持相对恒定的温度，冬天比上面的空气温暖，夏天比上面的空气凉爽。地源热泵利用了这一点，在冬季将储存在地球或地下水中的热量转移到建筑物中，并在夏季将其转移到建筑物外并返回到地下。利用地球作为热源/汇，一系列通常被称为“环路”的管道被埋在建筑物附近的地下进行调节。它通常循环一种防冻液，这种液体从周围的土壤中吸收热量，或将热量释放给周围的土壤，这取决于液体比土壤冷还是热。如果地面换热器（GHE）能够更好地在热泵和地面之间传递热量，那么地源热泵的整体性能将会更高。

The geothermal heat pump, also known as the ground source heat pump (GSHP), is a highly efficient renewable energy technology that is gaining wide acceptance for both residential and commercial buildings. GSHPs are used for space heating and cooling, as well as water heating. The technology relies on the fact that the Earth (beneath the surface) remains at a relatively constant temperature throughout the year, warmer than the air above it during the winter and cooler in the summer. The GSHP takes advantage of this by transferring heat stored in the Earth or in ground water into a building during the winter, and transferring it out of the building and back into the ground during the summer. Using the Earth as a heat source/sink, a series of pipes, commonly called a "loop," is buried in the ground near the building to be conditioned. It usually circulates an antifreeze solution fluid that absorbs heat from, or relinquishes heat to, the surrounding soil, depending on whether the fluid is colder or warmer than the soil. If a ground heat exchanger (GHE) can better transfer heat between the heat pump and the ground, the overall performance of the GSHP would be higher.