An experimental investigation was carried out to study the single-phase stagnation point jet impingement heat transfer on smooth and micro pin fin structures using water and R134a. The experiments were carried out for a single jet (dj = 2.0 mm) impinging on a 2 2 mm micro-heater over a wide range of Reynolds numbers. Both an unfinned and a micro structured impingement surfaces were investigated...

Active antenna arrays working at higher frequencies result in higher packaging densities. The antenna array under consideration operates at about 30 GHz and will be installed in an aircraft. Commercially available power amplifiers at these frequencies have an efficiency of typically 20 %, which results in high amounts of dissipated heat for the required high radiated power. The dissipated power...

Wearable thermoelectric generators (TEGs) harvest thermal energy generated by the body to generate useful electricity. The performance of these systems is limited by (1) the small working temperature differential between the body and ambient, (2) the desire to use natural air convection cooling on the cold side of the generator, and (3) the requirement for thin, lightweight systems that are com...

In this study, by using the finite volume method, the heat transfer in a convective straight fin with temperature-dependent thermal properties and an internal heat generation under multi-boiling heat transfer modes are analyzed. In this regard, the local heat transfer coefficient is considered to vary within a power-law function of temperature. In the present study, the coexistence of all the b...

In this study, a fluid–thermal–electrical multiphysics numerical model was developed for the thermal and electrical analyses of heat sink-based thermoelectric generator (TEG) in waste recovery system used casting bronze ingot mold. Moreover, validated based on experimental data. Heat sinks were installed hot side TEG module to recover from flue gas generated process. The results characteristics...

The performance of a heatsink with and without staggered fins is analyzed in the present work. The effect of flow resistance on thermal behavior of staggered plate heatsinks were analyzed in the present study. Ansys FLUENT has been used for the present simulation. Authors have used three different models with and without staggered arrangement. The result shows advantage of staggered heat sink o...

A tool for unified simultaneous simulation of multiphysics problems based on Partial Element Equivalent Circuit (PEEC) method is presented. Extension of PEEC method with thermal and mechanical domains is based on circuit interpretation of Finite Difference (FD) and Finite Element Method (FEM) equations. Equations in FEM case are derived by Galerkin's residual method with basis functions of orde...

In this study, the performance of thermoelectric generator (TEG) modules in converting excess photovoltaic (PV) temperature to electricity a hybrid photovoltaic/thermoelectric (PV/TEG) system is investigated. A one-dimensional analytical heat transfer model for PV/TEG with pin-fin based sink developed Engineering Equation Solver (EES) and simulated under tracking non-tracking conditions. The so...