An Investigation of a Model of a Coiled Heat Exchanger with Varying Geometry in a Wide Range of Reynolds Numbers

In this paper, the influence of geometric dimensions of a coiled heat exchanger on the flow characteristics in the intertubular space is studied. A design calculation of the coiled heat exchanger is performed. Numerical simulation of heat exchange for a 2D model of an exchanger with a varying diameter of inner coiling is carried out. For each of the geometric models under consideration, conclusions about specific features of flow and heat transfer for different Reynolds numbers are drawn. Fields of temperature and air flow velocity for various geometric models with equal coolant flow rate are presented. Thermal and hydraulic characteristics are obtained.

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