Hasan Salmani Tileh Noee - Department of mechanical engineering, Technical and vocational University (TVU), Tehran, Iran
Seyed Soheila Mousavi Ajarostaghi - Department of Mechanical EngineeringBabol Noshirvani University of Technology (BNUT) Babol, Iran
Seyed Hossein Hashemi Karouei - Department of Mechanical Engineering Babol Noshirvani University of Technology (BNUT) Babol, Iran
Reza Hosseini Fard - Department of Mechanical EngineeringMazandaran University of Science and Technology (MUST) Babol, Iran

The use of ground as a heat source in geothermal heat pumps has been considered in recent years due to its high efficiency and energy savings. In this paper, the numerical simulation of the thermal performance of hybrid nanofluid flow in a horizontal geothermal heat exchanger equipped with twisted tape as turbulator is done using ANSYS Fluent CFD code. The results of numerical simulation were compared with experimental works and a good agreement was seen between the results. The results show that the horizontal geothermal heat exchanger has better heat transfer to the ground surface in the case with hybrid nanofluids than in the case with pure water.Keywords: Borehole Heat Exchanger, Twisted Tape, Hybrid Nanofluid, Turbulator, Heat Transfer, Thermal Performance.

Borehole Heat Exchanger, Twisted Tape, Hybrid Nanofluid, Turbulator, Heat Transfer, Thermal Performance