2022年9月1日 · To this aim, a comprehensive three-dimensional transient Computational Fluid Dynamics model of the energy pile with triple helix GHE and the surrounding soil is developed. The effect of several parameters, including helix pitch, helix diameter and pipe diameter, on the thermal performance of the system, is investigated.

2022年11月1日 · In this paper, we present experimental measurements of pressure loss versus flow for four types of vertical GHE in a 200 m deep borehole: a single U-tube, double U-tubes connected in parallel, and in series, a coaxial heat exchanger, and a single U-tube with internal heat transfer enhancing ridges.

2024年11月1日 · Vertical U-tube ground heat exchanger (GHE) is modified by varying leg spacing between inlet and outlet. Modified GHEs also include the combination of straight and spiral parts in inlet or outlet pipes. Heat transfer rate increases by increasing leg spacing for upper sections without changing leg spacing of lower section.

2024年10月4日 · In the present study, the performance of several helix configurations that have an external helix outlet pipe is investigated and compared with a conventional U-tube ground heat exchanger. Another motive of this research is to find the best configuration in terms of heat transfer rate and pressure drop.

2020年3月21日 · In this paper, the idea of using the baffles to improve the performance of the coaxial geothermal heat exchanger (CGHE) has been proposed. Thermal and hydrodynamic analysis of two types of CGHE during heat injection and …

2023年4月9日 · Zhao et al. performed a thermal efficiency comparison of double-pipe and helix GHE. The findings showed that the helix GHE average near term heat resistance is less and thermal energy transfer mechanism is high, compared to the double U-pipe.

2022年9月1日 · Farajollahi et al. (2022) compared the thermal and hydraulic performance of a conventional helix and a triple helix GHE using a three-dimensional transient CFD model. The authors...

2022年9月1日 · A three-dimensional transient CFD model of pile, triple helix GHE and surrounding soil is developed. To evaluating the HP performance, an empirical correlation is used. The numerical model and an empirical correlation are coupled through the condenser inlet and outlet water temperatures.

2015年8月14日 · It is demonstrated that, the tiple helix GHE enhance the objective parameter by 24% compared to conventional helix GHE. According to the obtained results, the helix pitch has the...

Ground heat exchanger (GHE) is the most crucial element of a ground source heat pump (GSHP) system for building cooling and heating by the utilization of geothermal energy. Therefore, intending to enhance the performance of GHE, the present study conducts a computational investigation of the thermal performance of modified spiral tube vertical ...