In this paper, based on expounding the basic structure and operating principle of the flywheel energy storage system, the maximum energy storage and energy efficiency of the flywheel batteries are analyzed. Research data shows that there is still a part of the energy left after the flywheel energy storage system doing the effective energy output. In the premise to save this part of energy for p...

The main challenge in designing mobile embedded systems for internet of things is to provide a solution that has the limitied power by battery lifetime, in addition to overcome frequent battery recharging or replacement. The help of solar and wind energy harvesting systems is an attractive method to increase the autonomy of mobile embedded systems for internet of things trying to make a continu...

For remote places having less-strong wind, single resources based renewable energy system (RES) with battery storage can sustainably and economically generate electrical energy. There is hardly any literature on optimal sizing of such RES for very low load demand situation. The objective of this study is to techno-economically optimize the system design of a Photovoltaic (PV)-battery storage RE...

The approach of modular systems technology has now become generally accepted for the design of island grids with different renewable energy converters. This technology is characterised by a stipulated energy coupling (ac-bus bar 230/400 V, 50 Hz), a standardised information exchange and a supervisory control. These preconditions allow an adaptable and expandable system structure to be set up, t...

Current battery systems have severe cost and resource restrictions, difficultly to meet the large scale electric storage applications. Herein, we report an all-organic Na-ion battery using p-dopable polytriphenylamine as cathode and n-type redox-active poly(anthraquinonyl sulphide) as anode, excluding the use of transition-metals as in conventional electrochemical batteries. Such a Na-ion batte...

Due to the dramatic growth of global population, building multi-story buildings has become a necessity, which strongly requires installation an elevator regardless type being built. This study focuses on households, are second-largest electricity consumers after transportation sector. In residential buildings, elevators impose huge costs because they used by many consumers. The novelty this pap...

Large-scale energy storage represents a key challenge for renewable energy and new systems with low cost, high energy density and long cycle life are desired. In this article, we develop a new lithium/ polysulfide (Li/PS) semi-liquid battery for large-scale energy storage, with lithium polysulfide (Li2S8) in ether solvent as a catholyte and metallic lithium as an anode. Unlike previous work on ...

This paper describes a DC isolated network which is fed with Distributed Generation (DG) from photovoltaic (PV) renewable sources for supplying unbalanced AC loads. The battery energy storage bank has been connected to the DC network via DC/DC converter to control the voltage of the network and optimize the operation of the PV generation units. The PV arrays are connected to the DC network ...

Stand alone renewable energy based on photovoltaic systems accompanied with battery storage system are beginning to play an important role over the world to supply power to remote areas. The objective of the study reported in this paper is to elaborate and design a bond graphs model for sizing standalone domestic solar photovoltaic electricity systems and simulating the performance of the syste...