Abstract
In heat exchangers design, suitable numerical tools are necessary to find the appropriate structure and optimize a reference configuration that could provide the optimal balance between thermal power and pressure drop. Optimized designs often involve complex 3D structures that can now be produced using additive manufacturing technology. In two-phase heat exchangers, flows involving heat and mass transfer are the result of complex coupling between fluid properties and operating conditions, making design and optimization processes hard to achieve. Parameters such as two-phase heat transfer coefficient can be determined by experimental methods. In this paper, an experimental investigation of flow boiling and condensation in an additive manufactured heat exchanger was conducted. This heat exchanger mainly consists of two identical channels, each of hydraulic diameter 3 mm, with n-pentane and water used as working and heat transfer fluids, respectively. An experimental metrology based on infrared thermography was implemented in order to determine the profiles of local thermohydraulic parameters. The obtained experimental data were analyzed and discussed.
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