STUDY OF BOREHOLE HEAT EXCHANGER HEAT TRANSFER ENHANCEMENT PARAMETERS

This paper discusses the study of parameters for improving heat transfer a borehole exchanger ground source pump application. The efficiency was carried out based on an experimental prototype developed by authors. A mathematical model has been calculating three-dimensional equations and mass in porous medium. numerical solution using COMSOL Multiphysics software. calculation algorithm verified comparison with data from created prototype. Calculations were made various geometric configurations pipes well. With increase tube diameter, increases. diameter 40 mm, thermal 42.4 W/m charging mode, which is 24% more 20 mm. increasing well depth, influence conductivity coefficients pipe material, grout material types also studied. It shown that ground, flux increases, but above 6.0 K, practically does not change. When coefficient higher than 1.0 fluxes almost do In general, materials containing plastics are used piping exchangers, vary between 0.24-0.42 K.