Performance investigation of state-of-the-art metaheuristic techniques for parameter extraction of solar cells/module.

One of the greatest challenges for widespread utilization of solar energy is the low conversion efficiency, motivating the needs of developing more innovative approaches to improve the design of solar energy conversion equipment. Solar cell is the fundamental component of a photovoltaic (PV) system. Solar cell's precise modelling and estimation of its parameters are of paramount importance for the simulation, design, and control of PV system to achieve optimal performances.

Correction: Enhanced energy harvester performance by a tension annealed carbon nanotube yarn at extreme temperatures.

Correction for 'Enhanced energy harvester performance by a tension annealed carbon nanotube yarn at extreme temperatures' by Xinghao Hu , , 2022, , 16185-16192, https://doi.org/10.1039/D2NR05303A.

Enhanced energy harvester performance by a tension annealed carbon nanotube yarn at extreme temperatures.

Carbon nanotube (CNT) yarns generate electrical energy when they were stretched in an electrolyte, and they have been exploited for diverse applications such as self-powered sensors and human health monitoring systems. Here we improved the capacitance change and harvester performance of a coiled CNT yarn by using an incandescent tension annealing process (ITAP). When undergoing stretching cycles at 1 Hz, a coiled ITAP yarn can produce 2.

The Effects of Cogging Torque Reduction in Axial Flux Machines.

An axial flux permanent magnet single-rotor generator has good potential in various applications that require high efficiency, prolonged service life, as well as low mass and dimensions. However, the effect of cogging torque diminishes generator efficiency and flexibility of functionality. The effect of cogging torque arises because of a small air gap between the stator teeth and the rotor.