Analysis of the Influence of Heat Transfer in the Nozzle Divergence Section of Transcritical CO2 Two-phase Ejector [PDF]
The motive flow state in a transcritical CO2 ejector significantly affects its performance. The heat transfer on the wall of the motive nozzle can change the motive flow state, and its effect on the performance of the ejector should be studied.
Deng Jianqiang, Feng Yibo, He Yang
core +1 more source
Developing New Quality Productive Forces to Achieve Carbon Neutrality [PDF]
ObjectivesIn response to global climate change, China has committed to achieving carbon neutrality by 2060, which will inevitably bring strategic transformations across various industries and present an opportunity to develop new quality productive ...
HU Shanying, JIN Yong, ZHANG Zhenye
core +1 more source
Research on Modular Multi-level Energy Storage Converter for DC Micro-grid [PDF]
, 2017 在微电网中储能系统发挥着维持短时功率平衡、改善电能质量和提升发电质量的重要作用。锂电池储能具有比能量高、循环寿命长、效率高等优势，特别适合于微电网储能使用。本文针对直流微电网的应用场合，提出了一种模块化多电平储能变流器。它不仅保持了常规储能变流器控制能量双向流动的特性，还可以独立调制各个电池的充放电速率，实现了储能变流器与锂电池均衡电路的结合，具有很强的工程应用价值。 首先，介绍了课题的背景和意义，讨论了储能系统在微电网中的重要作用；介绍了储能变流器和锂电池均衡电路的研究进展 ...
魏闻
core
Research Review of Gravity Energy Storage Based on Grand Structure and Slope Gravity Energy Storage Systems [PDF]
[Objective] Gravity energy storage, as a new form of energy storage, plays an increasingly important role in balancing power supply and demand, responding to intermittent energy fluctuations, and other aspects of the power system.
Biao LIU, Jun LI, Jun LI, Zhaowei YUAN
core +1 more source
Risk Prediction Method of Low Frequency Oscillation in Maintenance Power Network Based on Long Short Term Memory Neural Network [PDF]
With the expansion of power grid scale and the increase of power components, the maintenance methods of power system become more and more complex. It is difficult to evaluate the low-frequency oscillation risk of power grid under massive maintenance only
DU Xiaoyong +8 more
core +1 more source
Application and Prospect of AI Technology in Power System Development [PDF]
[Introduction] In the face of energy scarcity and carbon reduction imperatives, the transition to clean energy centered on electricity is crucial.
Bin SHU +4 more
core +1 more source
Site Selection of Slope-Based Gravity Energy Storage Systems Using Fuzzy Analytic Hierarchy Process [PDF]
[Objective] Slope-based gravity energy storage (SGES), an emerging mechanical energy storage technology, can effectively enhance the local consumption of renewable energy, mitigate the intermittency and volatility of wind and solar power.
Fan ZHANG +3 more
core +1 more source
Numerical modeling of coupled hydrodynamic-chemical-biodegradation processes in coal mine water quality formation and evolution [PDF]
The formation and evolution mechanisms of coal mine water quality are intricate, significantly influenced by multiple processes such as hydrodynamics, hydrochemistry, and biodegradation.
Ge CHEN +6 more
core +1 more source
Construction and optimization on energy storage system of CO2 transcritical thermodynamic cycles
, 2022 针对全球温室效应问题，全球大多数国家和地区制定了符合国情的碳达峰与碳中和技术路线。实现双碳目标的主要途径一方面是从根源上减少化石能源消耗，构建清洁能源体系；另一方面则是提高化石能源利用率。为助力双碳目标的实现，电力行业正在由火力发电向可再生能源发电转变。储能作为解决可再生能源发电不稳定性、时空不匹配的关键技术，显得尤为重要。 储能技术种类众多，各类储能技术的储能规模、发展状态、应用领域、技术成熟度、成本等均存在差异，各有优缺点，这决定了不同的储能技术有着不同的应用领域，考虑到储能容量、成本、充放电效率、
董跃华
core
, 2019 本文基于德国Huntorf压缩空气储能(CAES)工厂的运行参数,利用Aspen Plus软件建模对CAES系统参数进行热力学分析。从研究结果知,降低级间冷却温度可以减少压缩机组电耗,降低储气室温度可以增加储气量,提高周期内发电量。通过高压透平机进口压力的梯级利用可以提高系统的循环效率RTE,提高低压透平机入口温度可以提高压缩空气的焓值及发电能力。通过回收低压透平机排气余热预热高压透平机压缩空气入口温度可以提高储能系统RTE,与Huntorf工厂的运行数据相比,最多可节约燃料40%
冯自平 +4 more
core +1 more source