Results 11 to 20 of about 3,111 (149)

Operation Control and Simulation of Supercritical Reheat Back Pressure Turbine [PDF]

open access: yes, 2023
[Introduction] In order to meet the needs of the rapid development of China's industry for high parameters and high-quality heat load, make full use of the advantages of the high efficiency of supercritical large-capacity units and the high thermal ...
Honglei YUAN   +3 more
core   +1 more source

Research Progress of Hydrogen Production by Methanol Reforming for Fuel Cell Power Generation [PDF]

open access: yes, 2022
Proton exchange membrane fuel cells take advantages of high efficiency, no pollution and good fuel adaptability. The green energy network formed by combining fuel cells with reliable hydrogen production is an effective way to achieve carbon neutrality ...
CAI Ningsheng   +4 more
core   +1 more source

计及电-热综合需求侧响应的热电联产机组优化配置研究 [PDF]

open access: yes全球能源互联网, 2019
为提高总体用能效率,构建综合能源系统是能源领域的重要发展趋势之一。在能源互联网中,综合需求响应利用电、热等不同形式能源间的耦合互补关系,在需求侧进行能源转换设备的协同优化,激发综合能源网络的灵活性,有利于提升能源利用效率,降低供能和用能成本。为此,提出一种计及电-热综合需求侧响应的热电联产(combined heat and power,CHP)机组优化配置方案,以电压幅值、综合网损及经济成本作为综合优化目标,运用次序配置策略,采用电-热直接潮流法、加权求和法和改进遗传算法求解上述问题。最后 ...
周晓鸣, 丁一, 邵常政, 徐晓帅
doaj   +1 more source

电力辅助服务市场下电采暖促进风电消纳的经济性分析 [PDF]

open access: yes全球能源互联网, 2019
中国三北地区电网风电渗透率较高,同时存在高比例燃煤热电联产机组用于满足冬季巨大的采暖需求,导致其灵活调节能力极其有限,弃风问题十分突出。现有研究尚缺乏对各种类型电采暖负荷促进风电消纳的经济性评价研究,尤其是以电力辅助服务市场为背景,对不同调节特性电采暖负荷的经济性分析还鲜有报道。由此,以集中蓄热式电采暖、直热式电采暖和分布式电采暖三种典型电采暖负荷为研究对象,利用时序生产模拟方法,构建基于实时调峰辅助服务的电采暖负荷消纳弃风经济评估模型,以北方地区实际运行的电采暖项目数据为算例 ...
严干贵, 杨玉龙
doaj   +1 more source

热电联产型共享储能的技经分析与市场机制研究 [PDF]

open access: yes全球能源互联网
以可再生能源和储能为主体的新型能源系统建设已成为能源转型的发展趋势。针对当前电化学储能面临技术经济性差以及供用能在品质上存在不匹配的问题,基于能量梯级综合利用的理念和共享经济的模式,提出热电联产型共享储能系统的技术与业态,探讨该类储能的基本运行原理、技术经济特性和商业模式。以高温固体蓄热、余热锅炉与汽轮机组成的典型热电联产型共享储能系统的案例分析表明,以固体蓄热为储能设备的热电联产型共享储能系统,在现有市场环境下实现系统经济性最优的容量配置和运行调度时,系统内部收益率达到10.6%、投资回收期为8.2 ...
冶兆年   +4 more
doaj   +1 more source

Economic Analysis of Battery Energy Storage Participating in AGC Ancillary Service of Coal-Fired Generating Unit [PDF]

open access: yes, 2023
[Introduction] In the context of "Dual Carbon", the demands for ancillary services of the electric power system are increasing. However, traditional thermal power units have many problems in AGC control.
Ying ZHONG
core   +1 more source

多区域综合能源系统互联下的共享储能容量优化配置 [PDF]

open access: yes全球能源互联网, 2021
为有效提高多个区域综合能源系统(regional integrated energy system,RIES)的能源利用率,同时合理配置储能系统的容量,提出一种多RIES互联下的共享储能系统容量优化配置模型。首先,介绍了共享储能背景下多RIES运行框架,分析了共享储能系统的运行模式。其次,针对一类包含热电联产机组与热泵等设备的RIES,建立以共享储能系统作为上层、多个RIES作为下层的双层优化配置模型。其中,上层以共享储能系统盈利最大作为目标,利用遗传算法对共享储能的容量、充放电功率进行优化 ...
帅轩越, 王秀丽, 黄晶
doaj   +1 more source

Thermodynamic Analysis of a New Combined Cooling, Heating and Power System Using CO2 Working Fluid [PDF]

open access: yes, 2022
In order to develop and utilize low-grade thermal energy such as solar energy, geothermal energy, industrial waste heat, etc, this paper proposed a combined cooling, heating and power system using CO2 as the working fluid.
CHEN Haifeng, GAO Yaonan, WANG Jianyong
core   +1 more source

Local Government Performance, Cost‐Effectiveness, and Use of the Web: An Empirical Analysis

open access: yesPolicy &Internet, Volume 11, Issue 4, Page 480-507, December 2019., 2019
This article empirically assesses the relationship between government use of the web, service performance, and cost‐effectiveness. It tests and challenges the assumption, prevalent in government thinking and in the Digital Era Governance (DEG) quasi‐paradigm, that the delivery of web‐based public services is associated with better outcomes.
Tom Nicholls
wiley   +1 more source

基于随机生产模拟的火电机组深度调峰提升新能源消纳能力评估方法 [PDF]

open access: yes全球能源互联网, 2019
中国许多地区已经开展火电机组深度调峰辅助可再生能源消纳的试点工作,但基于场景的时序模拟方法在分析其调峰效果时受到各类不确定因素影响,难以覆盖所有的运行场景,导致中长期评估结果准确性不高。因此,时序方法不适用于缺少详细时序数据的电源容量规划。为此基于随机生产模拟方法,面向规划应用提出了一种火电深度调峰提升系统可再生能源消纳效果的评估方法。该方法建立了包括非供热火电机组、热电联产机组和风电等电源在内的供给侧概率模型,分析了在不同火电深度调峰方式下,系统负荷、可再生能源发电的概率特性变化 ...
马彦宏   +4 more
doaj   +1 more source

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