Energy storage makes energy continuously available, programmable, and at power levels different from the original intensity. This study investigates feasibility of compressed-air (CAES) systems on a small scale. In addition to CAES systems, there are two TES (thermal storage) for recovery calories frigories. The micro-CAES + system is designed single-family residential building equipped with ph...

Abstract As a key energy equipment of the compressed air storage (CAES) system, centrifugal compressor with shroud cavity is employed to avoid leakage flow from rotor, especially in high-pressure stages. In order clarify characteristics and its influences, taken as research object present work. First, across has been studied numerically, it’s found that there are negative effects on compressor’...

World wind energy resources are substantial, and in many areas, such as the US and northern Europe, could in theory supply all of the electricity demand. However, the remote or challenging location (i.e. offshore) and especially the intermittent character of the wind resources present formidable barriers to utilization on the scale required by a modern industrial economy. All of these technical...

Million cubic meters from abandoned mines worldwide could be used as subsurface reservoirs for large scale energy storage systems, such adiabatic compressed air (A-CAES). In this paper, analytical and three-dimensional CFD numerical models have been conducted to analyze the thermodynamic performance of A-CAES in during charging discharging processes. Unlike other research works, which heat tran...

In current conventional utility systems, fossil fuel or nuclear power plants must back up intermittent renewable electricity generators if the utility grid is to have acceptable reliability. For low levels of intermittent power, this can be achieved without difficulty or added expense. For high levels this reliance on other generators becomes explicit and increasingly expensive, and transmissio...

We present a theoretical framework to calculate how storage affects the energy return on energy investment (EROI) ratios of wind and solar resources. Our methods identify conditions under which it is more energetically favorable to store energy than it is to simply curtail electricity production. Electrochemically based storage technologies result in much smaller EROI ratios than large-scale ge...

We are witnessing the growth of microgrid technology and development electric vehicles (EVs) in world. These microgrids seek demand response (DR) energy storage for better management their resources. In this research, microgrids, including wind turbines, photovoltaics, battery charging/discharging, compressed air (CAES), considered. will consider two scenarios under uncertainty: (a) planning a ...

An efficient and sufficiently power dense air compressor/expander is the key element in a Compressed Air Energy Storage (CAES) approach. Efficiency can be increased by improving the heat transfer between air and its surrounding materials. One effective and practical method to achieve this goal is to use water droplets spray inside the chamber when air is compressing or expanding. In this paper,...

There is a significant energy transition in progress globally. This mainly driven by the insertion of variable sources energy, such as wind and solar power. To guarantee that supply meets its demand, storage technologies will play an important role integrating these intermittent sources. Daily can be provided batteries. However, there still no technology provide weekly, monthly seasonal service...