No abstract

In this study, different heat transfer mechanisms and flow conditions were investigated to determine the temperature distribution. For this purpose, we proposed a coaxial tubular heat exchanger with a hemispherical end for different thermal parameters. Our attention was focused on the effect of geometry on the thermal and dynamic characteristics of the flow and on the performance of the studied heat exchanger. The results obtained show a qualitative agreement between those obtained and those found in the literature with a difference mainly due to the difference in geometry (the hemispherical end of the heat exchanger) and the code used.

In this paper, a numerical study of a buried hemispherical double-pipe heat exchanger with soil by using geothermal energy is presented. Since the local air-wall exchange coefficient throughout the heat exchanger is unknown, a study of mathematics based on the theory of Green's functions in the unsteady state was developed. The complexity of the geometry has led us to develop a numerical study that allows us to obtain results that reflect the importance of heat exchange. The applications are numerous, especially in the storage of energy in the soil to optimize greenhouses according to the cycle of the seasons.