Superimposed accumulation mechanism and model of vertical source rock–reservoir system of coal-measure gas is crucial to evaluate the exploration potential, …
Here, we have developed two different types of energy storage (ES) system models, namely LAES (Liquid air energy storage) and HES (Hydrogen energy …
Roof rocks in coal mines are subjected to the combination of in situ stresses and dynamic stresses induced by mining activities. Understanding the mechanical properties of roof rocks under static and dynamic loads at medium strain rates is of great significance to revealing the mechanism of rock bursts. In this study, we employ the …
An S-CO 2 energy-storage cycle system is added to a 660 MW coal-fired power unit to increase operational flexibility. With a round-trip efficiency ( RTE ) of …
To explore the law of energy evolution of coal, a one‐time loading and unloading test under uniaxial compression was conducted on coal taken from four …
Starting from the development of Compressed Air Energy Storage (CAES) technology, the site selection of CAES in depleted gas and oil reservoirs, the evolution mechanism of …
Abstract. Both carbon dioxide and hydrogen can be stored in coal seams as two enabling components of energy transition from fossil-based systems to renewable sources. In both cases, understanding the evolution of coal permeability under the …
Except for pumped storage, other existing electric energy storage technologies are difficult to achieve large-capacity energy storage and not easy to simultaneously meet the requirements in terms of site selection, cost, efficiency, and response. For this end, this paper combines the advantages of maglev technology and vacuum technology, proposes …
The Energy Principle of Coal and Gas Outbursts: Experimentally Evaluating the Role of Gas Desorption Y ang Lei 1,2,3 · Y uanping Cheng 1,2,3 · Ting Ren 4 · Qingyi T u 1,2,3 · Longyong Shu 5 ...
The concept of pumped-storage power of coal mine was presented in this paper. Four technologies of electric power generation,i. e. the drop head type,the lifting piston type,the …
In order to enhance the energy storage efficiency of the off-peak electricity provided by the grid, an advanced concept for the integration of the coal power unit and the compressed air energy storage (CAES) system has been put forward. According to the principle of energy cascade utilization, the heat energy released from the charging process of the CAES …
In this paper, different emerging post-combustion technologies, i.e., monoethanolamine (MEA), aqueous ammonia, pressure swing adsorption (PSA), temperature swing adsorption (TSA), membrane and calcium looping, were applied to an ultra-supercritical coal-fired power plant for carbon capture. ...
Moreover, at a thermal storage temperature of 353.1 K, T-CO 2 energy storage cycle achieves a round-trip efficiency of 61.37% and an energy storage density of 0.989 kWh/m 3. The results indicate that the combined system exhibits excellent performance, particularly under relatively lower thermal source temperature.
(1) Establish strict environmental protection standards and emission limits to ensure that coal mine energy storage facilities do not have a negative impact on the …
A large number of coal-bearing strata with various lithologies are developed in China''s major energy basins, which mainly includes coal seams, organic-rich mudstones, shales, and tight …
The problem of energy storage is especially actual in respect to renewable sources of energy, such as sun, wind, tides, which have seasonal or diurnal variations and which therefore are not available at any moment of time. This article overviews the main principles of storage of solar energy for its subsequent long-term consumption.
As the renewable energy fluctuating in the power grid, the traditional coal-fired power plant needs to operate on the extremely low load, so as to increase the share of renewable ...
Our study found that 1) the integration of underground coal gasification and carbon capture and sequestration (UCG-CCS) is an effective technology to improve energy efficiency and achieve the carbon …
With optimized Molten-salt energy storage plans, the storage efficiencies increase to 72.6% and 78% via lead the exhaust drains or steam into higher pressure …
FO 2 -6 was drilled 67 m deep from an in-mine "ground" elevation of − 346.98 masl. FO 2 -S2 had an initial water pressure of 2.8 MPa as indicated by a pressure gage at the wellhead, and yielded 263 m 3 /h during the test. FO 2 -6 showed an initial water pressure of 3.8 MPa and yielded 126 m 3 /h. Fig. 6.