In the present work, an innovative hybrid solar panel is proposed, which can be used to pave floors or to cover roofs. A particular Heat sink is employed, which gives robustness to the panel and provides a better Heat transfer effectiveness with respect to tube Heat exchangers. The geometry of the Heat sink which is employed in the panel is optimized with the help of a numerical model and a genetic algorithm. Some optimization examples are shown. The velocity and temperature distributions on the Heat sink cross section are also investigated. The presented hybrid panel allows till 20% increase in the electrical efficiency with respect to a simple photovoltaic panel. Moreover, it can be easily installed under every environmental conditions due to its robustness and resistance to water infiltration.

This study focuses on improving the thermal characteristics of a plate-finned Heat sink (PFHS) by incorporating a vapor chamber (VC) through experimental investigation. The research examines the influence of various parameters, including Reynolds number (Re), Heat input, filling ratio (FR), and operating vacuum pressure, on the thermal performance of the VC. The results demonstrate that the utilization of a VC leads to a significantly more uniform temperature distribution along the base of the PFHS and low overall temperatures. Conversely, in the absence of a VC, the PFHS exhibits a non-uniform temperature distribution, with a bell-shaped profile and concentrated high temperatures at the center at the same operating conditions. The results indicate that an operating vacuum pressure of 1kPa produces the most favorable performance. Additionally, a filling ratio of 50% proves to be optimal across the range of Heat inputs from 10 to 90 W.

The aim of the present numerical investigation is to analyze the effects of transverse magnetic field on Heat transfer and fluid flow characteristics in a rectangular microchannel Heat sink (MCHS). The effects of Hartmann number, channel aspect ratio, total channel height and total channel width on Heat transfer and fluid flow characteristics are widely investigated. The governing equations for three-dimensional steady, laminar flow and conjugate Heat transfer of a microchannel are solved using the finite volume method. The obtained results are discussed with various combinations of pertinent parameters involved in the study. The results reveal that magnetic field can enhance the thermal performance of the MCHS but it is accompanied with a slight increase in pressure drop.

The concept of periodic renewal of boundary layers is a promising technique for the enhancement of Heat transfer in microchannels. Extending the above concept, microchannel Heatsink with modified hexagonal fins has been proposed for disrupting the flow periodically. An experimental study has been carried out to investigate the Heat transfer and fluid flow characteristics of a microchannel Heat sink with modified hexagonal fins and a conventional type of microchannels with plate fins. The Heat transfer and fluid flow characteristics of the modified hexagonal fin microchannels have been compared with the plate fin microchannels. The Heat transfer enhancement factor and pressure drop penalty factors are evaluated and compared. The modified hexagonal fin microchannel Heat sink has been found to outperform the plate fin microchannel Heat sinks in spite of the lesser Heat transfer area.

A computational modelling of microchannel Heat sinks with high aspect ratio has been performed to compare the geometrical features in the plane parallel to the Heating surface and to determine the optimum configuration for the best Heat transfer characteristics. A periodic thermal development of flow can cause significant Heat transfer enhancement. A consensus on a particular geometrical configuration that provides the best Heat transfer characteristics has not been reached in the literature, although many novel ideas have been proposed recently. Firstly the validity and applicability of microchannel sink modelling is presented followed by an optimization of parameters of interrupted microchannel Heat sink. Consequences of the multichannel effect due to the introduction of transverse microchamber are also presented. It has been shown that the average Nusselt number of the microchannel Heat sink increases by the introduction of a transverse microchamber with the additional advantage of a lower pressure drop. There exists an optimum width for the transverse microchamber for which the interrupted microchannel Heat sink shows optimum characteristics.

In this research, the impact of Heat transfer on mixed convection steady third-grade fluid flow over an impermeable stretching cylinder with Heat source is scrutinized. The investigation of mixed convection with non-Newtonian fluid is significant in geophysical and engineering fields. Appropriate transformations are alleged to obtain ordinary differential equations, which are later computed by using an analytical approach called the homotopy analysis methodology (HAM), and the interval of convergence is computed. Local Nusselt number and coefficient of skin friction values are computed numerically for novel parameters.