Comparative Analysis of Energy Storage Methods for Energy Systems and Complexes

Abstract

The daily non-uniform power demand is a serious problem in power industry. In addition, recent decades show a trend for the transition to renewable power sources, but their power output depends upon weather and daily conditions. These factors determine the urgency of energy accumulation technology research and development. The presence of a wide variety of energy storage mechanisms leads to the need for their classification and comparison as well as a consideration of possible options for their application in modern power units. This paper presents a comparative analysis of energy storage methods for energy systems and complexes. Recommendations are made on the choice of storage technologies for the modern energy industry. The change in the cost of supplied energy at power plants by integrating various energy storage systems is estimated and the technologies for their implementation are considered. It is revealed that in the large-scale power production industry, the most productive accumulation methods for energy systems and complexes are the following: pumped hydroelectric energy storage systems, thermal and thermochemical accumulations, and hydrogen systems. These methods have the best technical and economic characteristics. The resulting recommendations allow for the assessment of the economic and energy effect achieved by integration of storage systems at the stage of designing new power units.

Analysis of the Exothermic Reaction of Flame Ignition in the Combustion Chamber of a Gas Turbine Unit

“…The groups included in expression (15) of criteria and parameters describe the following: the rate of chemical reaction; the rate of heat emission as a result of chemical reaction; the intensity of phase transformation processes in the combustion chamber-p k ; T K ; T Z ; E S ; α; type of fuel; convective energy transfer rate of the substance; and the amount of movement through the reaction volumes of the combustion chamber and the hearth supporting its combustion at the boundary of its failure, G V p , λ 0 [1,3,[25][26][27]. At maximum α, the optimum value of the relative swirl capacity is determined with µ − F 3 .…”

Prospects of Hydrogen Application as a Fuel for Large-Scale Compressed-Air Energy Storages

“…Therefore, renewable energy sources such as solar radiation and wind energy plants are spreading more and more in the electricity market, also thanks to economic concessions introduced by policies and governments. However, some renewable energy sources, e.g., wind energy, are gifted with a stochastic nature, so their energy and power production cannot be foreseen or planned both in time and space [3,4]. This is a major issue for renewable energy introduction in the electricity grid because, at each time instant and each spatial position, energy demand and supply must be balanced to not make the grid collapse.…”