The paper represents the mathematical model for diagnostics of solar cell. The research objectives are the problem of determining a solar cell technical condition during its operation. The solar cell diagnostics is based on the mathematical model of solar cells. The single-diode solar cell model is characterized by a slight deviation of the theoretically calculated characteristics from the characteristics of the real solar cell, one of the reasons being the complexity of the accurate measurement of the series resistance. The single-diode solar cell model uses the current and voltage ratio in the form of an implicit function and it cannot be solved directly. For its solution it is necessary to use numerical methods. This is main disadvantage of the single-diode solar cell model. The methodological approach to increasing the reliability of the solar cell diagnostic has been proposed, in terms of multi-parameter the solar cell diagnostic by applying the solar cell impedance model.
Knowledge of the technical state and construction of the hydraulic and pneumatic control system of Multimedia Hybrid Mobile Stage HMSM allows you to identify hazards and make a risk assessment. The aspects of the algorithmic process of diagnosing pneumatic and hydraulic control systems presented in the work form the basis for the development and implementation of safe solutions in the process of operation. This article describes the methodology for diagnosing HMSM machine hydraulics and industrial pneumatics systems, detailing the factors determining the correctness of maintaining functional fitness. The considerations developed illustrate the complexity of the diagnostic testing design process for condition assessment.
The paper represents the mathematical model for diagnostics of the corrosion protection potential for the electric water heaters (EWH). The research objectives are the problem of determining the EWH corrosion protection technical condition during its operation. The EWH corrosion protection diagnostics is based on the mathematical model of the corrosion protection potential for EWH. The model is based on the nonlinear equivalent circuit which is modelling the nonlinear impedance of the corrosion cathodic protection. In the development of the mathematical model the authors carried out experimental measurements of the impedance for the EWH body fragment. The obtained experimental results show that mathematical model includes the fractional integrating elements. By using of the experimental results the expressions of the impedance, the impulse response is obtained. The methodological approach to increasing the reliability of the EWH corrosion protection diagnostics has been proposed, in terms of the multi-parameter diagnostics, by applying the EWH corrosion protection impedance model.
The problem of finding alternative energy sources has become particularly important over the last few decades. The reasons for this are insufficient extraction of fossil fuels, primarily oil and gas, as well as environmental pollution caused by their use. On the other hand, solar energy is a free, almost everywhere available resource that allows generating environmentally friendly electricity without the least harm to the environment. In view of this, solar power is one of the most promising areas of rapidly developing alternative energy. Nowadays, semiconductor devices with p-n-junction, which are called solar cells or photocells, have become widely used in the field of solar power. In such devices, due to the internal photoelectric effect under the influence of solar radiation, there is a redistribution of charges that causes emergence of electromotive force, so that it becomes possible to directly convert solar energy into electric energy. The one-diode mathematical model of the solar cell is analyzed in the paper. The solar cell is characterized by impedance which depends of environmental conditions. The laboratory workbench is designed to measure the impedance of the solar cell. The improved impedance mathematical model of a solar cell is proposed. It consists of: the serial resistance, barrier capacitance, barrier resistance, diffusion resistance and fractional order diffusion capacitance. The experimental Nyquist plot was fitted by using of the improved expression for impedance of the solar cell.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.