废弃煤炭井巷抽水储能的全生命周期成本研究

废弃煤炭井巷抽水储能不仅有利于废弃煤炭井巷资源的再利用,而且有利于促进可再生能源电力的消纳,能够推动煤炭资源型地区能源供给系统的转型发展。废弃煤炭井巷抽水储能的全生命周期成本核算是该项技术推广的前提,具有必要性和现实意义。本文参照大柳塔煤矿地下水库的相关数据,建立了废弃煤炭井巷抽水储能的技术参数体系;通过与传统抽水储能电站进行对比,分析废弃煤炭井巷抽水储能的全生命周期经济成本和环境成本;利用敏感性分析,得出各影响因素对平准化发电成本的影响程度。结果显示:①在不考虑施工难度的情况下,同等装机规模的废弃煤炭井巷抽水储能的平准化储能成本低于传统抽水储能电站的平准化储能成本;在考虑施工难度的情况下,若废弃煤炭井巷抽水储能的施工难度系数小于传统抽水储能的1.26倍,则废弃煤炭井巷抽水储能的成本要小于传统抽水储能;②废弃煤炭井巷抽水储能的装机规模小于传统抽水储能时,其平准化储能成本虽然高于传统抽水储能,但低于当地峰谷差价,具有经济可行性;③施工难度是影响废弃煤炭井巷抽水储能成本的关键因素,环境成本对废弃煤炭井巷抽水储能平准化发电成本影响程度最小;④废弃煤炭井巷抽水储能的环境成本较低,在全生命周期发...     

Application of novel pretreatment technologies for intensification of drying performance and quality attributes of food commodities: a review

Food Science and Biotechnology - Drying is an energy-intensive process that can be reduced by the application of pretreatment prior to drying to enhance mass transfer and minimize energy...     

Smart and Multifunctional Fiber-Reinforced Composites of 2D Heterostructure-Based Textiles

Smart and multifunctional fiber reinforced polymer (FRP) composites with energy storage, sensing, and heating capabilities have gained significant interest for automotive, civil, and aerospace applications. However, achieving smart and multifunctional capabilities in an FRP composite while maintaining desired mechanical properties remains challenging. Here, a novel approach for layer-by-layer (LBL) deposition of 2D material (graphene and molybdenum disulfide, MoS₂)-based heterostructure onto glass fiber fabric using a highly scalable manufacturing technique at a remarkable speed of ≈150 m min⁻¹ is reported. This process enables the creation of smart textiles with integrated energy storage, sensing, and heating functionalities. This methodology combines gel-based electrolyte with a vacuum resin infusion technique, resulting in an efficient and stable smart FRP composite with an areal capacitance of up to ≈182 µF cm⁻² at 10 mV s⁻¹. The composite exhibits exceptional cyclic stability, maintaining ≈90% capacitance after 1000 cycles. Moreover, the smart composite demonstrates joule heating, reaching from ≈24 to ≈27 °C within 120 s at 25 V. Additionally, the smart composite displays strain sensitivity by altering electrical resistance with longitudinal strain, enabling structural health monitoring. These findings highlight the potential of smart composites for multifunctional applications and provide an important step toward realizing their actual real-world applications.     

The impact of a recessed Δ-shaped gate in a vertical CAVET AlGaN/GaN MIS-HEMT for high-power low-loss switching applications

Journal of Computational Electronics - A Δ-shaped gate GaN-based E-mode vertical current-aperture vertical electron transistor (CAVET) device with a boron-doped current block layer (B-CBL) on...     

Effect of radiation absorption and chemical reaction on MHD-free convective flow through a porous medium past an infinite vertical porous plate in the presence of constant heat flux

An incompressible, electrically conducting, and viscous fluid flowing steadily and freely across a uniformly porous media that is partially constrained by an infinitely long vertical porous plate is studied in the present article. Additionally, chemical reaction and radiation absorption effects are seen. Here, a magnetic field of uniform strength is applied transversely to the plate, a normal suction velocity is imposed on the fluid, and the heat flux is considered to be constant. The non-dimensional momentum and energy equations are solved using the method of perturbation. The problem has been analytically resolved, and several parameters, including the Hartmann number, porosity parameter, thermal Grashof number, mass Grashof number, and transport properties like the Sherwood number, skin friction, and plate temperature, are graphically represented. The current study reveals a spike in the radiation absorption effect causes skin friction to drop, but on the other hand, a contrary effect is observed for plate temperature. One of the notable findings of this investigation is that the Sherwood number increases as chemical reaction parameter influence increases.