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Exergy-energy analysis of full repowering of a steam power plant

S. NIKBAKHT NASERABAD,K. MOBINI,A. MEHRPANAHI,M. R. ALIGOODARZ

《能源前沿（英文）》 2015年第9卷第1期页码 54-67 doi: 10.1007/s11708-014-0342-6

摘要： A 320 MW old steam power plant has been chosen for repowering in this paper. Considering the technical conditions and working life of the power plant, the full repowering method has been selected from different repowering methods. The power plant repowering has been analyzed for three different feed water flow rates: a flow rate equal to the flow rate at the condenser exit in the original plant when it works at nominal load, a flow rate at maximum load, and a flow rate when all the extractions are blocked. For each flow rates, two types of gas turbines have been examined: V94.2 and V94.3A. The effect of a duct burner has then been investigated in each of the above six cases. Steam is produced by a double-pressure heat recovery steam generator (HRSG) with reheat which obtains its required heat from the exhaust gases coming from the gas turbines. The results obtained from modeling and analyzing the energy-exergy of the original steam power plant and the repowered power plant indicate that the maximum efficiency of the repowered power plant is 52.04%. This maximum efficiency occurs when utilizing two V94.3A gas turbines without duct burner in the steam flow rate of the nominal load.

关键词： full repowering exergy analysis V94.2 and V94.3A gas turbines double-pressure HRSG duct burner Bandarabbas steam power plant efficiency

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Impacts of solar multiple on the performance of direct steam generation solar power tower plant with

Yan LUO, Xiaoze DU, Lijun YANG, Chao XU, Muhammad AMJAD

《能源前沿（英文）》 2017年第11卷第4期页码 461-471 doi: 10.1007/s11708-017-0503-5

摘要： Solar multiple (SM) and thermal storage capacity are two key design parameters for revealing the performance of direct steam generation (DSG) solar power tower plant. In the case of settled land area, SM and thermal storage capacity can be optimized to obtain the minimum levelized cost of electricity (LCOE) by adjusting the power generation output. Taking the dual-receiver DSG solar power tower plant with a given size of solar field equivalent electricity of 100 MW in Sevilla as a reference case, the minimum LCOE is 21.77 ￠/kWh with an SM of 1.7 and a thermal storage capacity of 3 h. Besides Sevilla, two other sites are also introduced to discuss the influence of annual DNI. When compared with the case of Sevilla, the minimum LCOE and optimal SM of the San Jose site change just slightly, while the minimum LCOE of the Bishop site decreases by 32.8% and the optimal SM is reduced to 1.3. The influence of the size of solar field equivalent electricity is studied as well. The minimum LCOE decreases with the size of solar field, while the optimal SM and thermal storage capacity still remain unchanged. In addition, the sensitivity of different investment in sub-system is investigated. In terms of optimal SM and thermal storage capacity, they can decrease with the cost of thermal storage system but increase with the cost of power generation unit.

关键词： direct steam generation solar power tower solar multiple thermal energy storage capacity levelized cost of electricity (LCOE)

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Carbon emission impact on the operation of virtual power plant with combined heat and power system

Yu-hang XIA,Jun-yong LIU,Zheng-wen HUANG,Xu ZHANG

《信息与电子工程前沿（英文）》 2016年第17卷第5期页码 479-488 doi: 10.1631/FITEE.1500467

摘要： A virtual power plant (VPP) can realize the aggregation of distributed generation in a certain region, and represent distributed generation to participate in the power market of the main grid. With the expansion of VPPs and ever-growing heat demand of consumers, managing the effect of fluctuations in the amount of available renewable resources on the operation of VPPs and maintaining an economical supply of electric power and heat energy to users have been important issues. This paper proposes the allocation of an electric boiler to realize wind power directly converted for supplying heat, which can not only overcome the limitation of heat output from a combined heat and power (CHP) unit, but also reduce carbon emissions from a VPP. After the electric boiler is considered in the VPP operation model of the combined heat and power system, a multi-objective model is built, which includes the costs of carbon emissions, total operation of the VPP and the electricity traded between the VPP and the main grid. The model is solved by the CPLEX package using the fuzzy membership function in Matlab, and a case study is presented. The power output of each unit in the case study is analyzed under four scenarios. The results show that after carbon emission is taken into account, the output of low carbon units is significantly increased, and the allocation of an electric boiler can facilitate the maximum absorption of renewable energy, which also reduces carbon emissions from the VPP.

关键词： Virtual power plant (VPP) Carbon emissions Electric boiler Wind power Combined heat and power (CHP)

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A coal-fired power plant integrated with biomass co-firing and CO capture for zero carbon emission

《能源前沿（英文）》 2022年第16卷第2期页码 307-320 doi: 10.1007/s11708-021-0790-8

摘要： A promising scheme for coal-fired power plants in which biomass co-firing and carbon dioxide capture technologies are adopted and the low-temperature waste heat from the CO₂ capture process is recycled to heat the condensed water to achieve zero carbon emission is proposed in this paper. Based on a 660 MW supercritical coal-fired power plant, the thermal performance, emission performance, and economic performance of the proposed scheme are evaluated. In addition, a sensitivity analysis is conducted to show the effects of several key parameters on the performance of the proposed system. The results show that when the biomass mass mixing ratio is 15.40% and the CO₂ capture rate is 90%, the CO₂ emission of the coal-fired power plant can reach zero, indicating that the technical route proposed in this paper can indeed achieve zero carbon emission in coal-fired power plants. The net thermal efficiency decreases by 10.31%, due to the huge energy consumption of the CO₂ capture unit. Besides, the cost of electricity (COE) and the cost of CO₂ avoided (COA) of the proposed system are 80.37 $/MWh and 41.63 $/tCO₂, respectively. The sensitivity analysis demonstrates that with the energy consumption of the reboiler decreasing from 3.22 GJ/tCO₂ to 2.40 GJ/ tCO₂, the efficiency penalty is reduced to 8.67%. This paper may provide reference for promoting the early realization of carbon neutrality in the power generation industry.

关键词： coal-fired power plant biomass co-firing CO₂ capture zero carbon emission performance evaluation

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Fault simulation of boiler heating surface ash deposition in a power plant system

Weiwei ZHANG, Huisheng ZHANG, Ming SU

《能源前沿（英文）》 2011年第5卷第4期页码 435-443 doi: 10.1007/s11708-011-0162-x

摘要： The simulation model of a power generation system was developed based on EASY5 simulation platform. The performances of the power plant under the conditions of the furnace slagging and ash deposition of the heating surfaces in the boiler were simulated. The results show that the simulation model can reasonably reflect the characteristics of the power plant when each component is under fault conditions. Through fault simulation, the change of the performance parameters can be obtained, which can be used in fault diagnosis system as the diagnosis criterion for expert system.

关键词： boiler slagging ash deposition fault simulation

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Viability of a concentrated solar power system in a low sun belt prefecture

Rahul BHATTACHARJEE, Subhadeep BHATTACHARJEE

《能源前沿（英文）》 2020年第14卷第4期页码 850-866 doi: 10.1007/s11708-020-0664-5

摘要： Concentrating solar power (CSP) is considered as a comparatively economical, more efficient, and large capacity type of renewable energy technology. However, CSP generation is found restricted only to high solar radiation belt and installed where high direct normal irradiance is available. This paper examines the viability of the adoption of the CSP system in a low sun belt region with a lower direct normal irradiance (DNI). Various critical analyses and plant economics have been evaluated with a lesser DNI state. The obtained results out of the designed system, subjected to low DNI are not found below par, but comparable to some extent with the performance results of such CSP plants at a higher DNI. The analysis indicates that incorporation of the thermal energy storage reduces the levelized cost of energy (LCOE) and augments the plant capacity factor. The capacity factor, the plant efficiency, and the LCOE are found to be 32.50%, 17.56%, and 0.1952 $/kWh, respectively.

关键词： concentrated solar power direct normal irradiance plant performance plant economics thermal energy storage

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Combined heat and power plant integrated with mobilized thermal energy storage (M-TES) system

Weilong WANG, Yukun HU, Jinyue YAN, Jenny NYSTR?M, Erik DAHLQUIST

《能源前沿（英文）》 2010年第4卷第4期页码 469-474 doi: 10.1007/s11708-010-0123-9

摘要： Energy consumption for space and tap water heating in residential and service sectors accounts for one third of the total energy utilization in Sweden. District heating (DH) is used to supply heat to areas with high energy demand. However, there are still detached houses and sparse areas that are not connected to a DH network. In such areas, electrical heating or oil/pellet boilers are used to meet the heat demand. Extending the existing DH network to those spare areas is not economically feasible because of the small heat demand and the large investment required for the expansion. The mobilized thermal energy storage (M-TES) system is an alternative source of heat for detached buildings or sparse areas using industrial heat. In this paper, the integration of a combined heat and power (CHP) plant and an M-TES system is analyzed. Furthermore, the impacts of four options of the integrated system are discussed, including the power and heat output in the CHP plant. The performance of the M-TES system is likewise discussed.

关键词： Mobilized thermal energy system district heating thermal energy storage combined heat and power detached houses

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Steam turbine governor modeling and parameters testing for power system simulation

Ying LI, Chufeng PENG, Zenghui YANG

《能源前沿（英文）》 2009年第3卷第2期页码 198-203 doi: 10.1007/s11708-009-0004-2

摘要： The theoretical modeling, parameters test and model correction for a steam turbine (ST) governor are discussed. A set of ST Governor system model for power system simulation is created based on this research. A power system simulation for an actual power grid accident is conducted using this new model and the comparison between the simulation and actual data show that the results are satisfactory.

关键词： power system simulation ST governor system modeling parameters testing

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NO control in large-scale power plant boilers through superfine pulverized coal technology

YIN Jie, WEI Dunsong, YIN Jie, REN Jianxing

《能源前沿（英文）》 2008年第2卷第4期页码 461-465 doi: 10.1007/s11708-008-0057-7

摘要： Superfine pulverized coal technology can effectively reduce NO emission in coal-fired power plant boilers. It can also economize the cost of the power plant and improve the use of the ash in the flue gas. Superfine pulverized coal technology, which will be widely used in China, includes common superfine pulverized coal technology and superfine pulverized coal reburning technology. The use of superfine pulverized coal instead of common coal in large-scale power plants will not only reduce more than 30% of NO emission but also improve the thermal efficiency of the boiler.

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超临界化——优化我国火电结构应从这里起步

宋之平

《中国工程科学》 2002年第4卷第2期页码 22-27

摘要：

文章认为优化火电结构应放在超临界化上，使超临界机组和超超临界机组在我国火电中占据举足轻重的比例。而且这些机组的主要性能指标以及环保性能等应不逊于同类机组的国际水平。论述了超临界技术在优化火电结构的特殊作用，指出超临界化已被证明是改造和优化火电结构的一种成功的道路，阐明了我国实施这一发展道路的必要性和可能性。

关键词：火电结构超临界超超临界可持续发展战略

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核电厂工程结构抗震研究进展

孔宪京,林皋

《中国工程科学》 2013年第15卷第4期页码 62-74

摘要：

当前以及今后相当长一段时期，核电都将是中国积极发展的能源形式之一，保障核电安全是确保核电工程建设顺利实施和安全运营的关键。然而，中国幅员广阔，地质条件差异大，海域自然条件复杂；同时，中国地震活动范围广、强度大、频度高，基于标准化设计的核电工程结构在建设过程中面临着诸多问题。尤其是2011年日本大地震导致的福岛核电事故的教训，对核电工程的抗震安全提出了新的问题。结合大连理工大学十几年来在解决我国核电工程结构抗震安全中的关键问题，以及在“地震作用下核电厂工程结构的功能失效机理及抗震安全评价”研究中所取得若干进展进行综述性介绍，主要包括核岛地基抗震适应性研究和核岛安全相关工程结构抗震防灾研究。

关键词：核电厂地基适应性取排水构筑物安全壳抗震安全评价

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燃煤电站烟气污染物深度脱除技术的分析

张晓鲁

《中国工程科学》 2014年第16卷第10期页码 47-51

摘要：

近年来雾霾天气的频繁出现使得细颗粒物（PM_2.5）成为了公众关注的热点，PM2.5的控制也已增加到2012 年发布的《环境空气质量标准》中，而目前我国现有的烟气污染物控制技术难以脱除PM_2.5，因此，为深度脱除PM_2.5、SO₂、SO₃以及重金属等烟气污染物，开发燃煤电站烟气污染物深度脱除技术（深度脱除技术）成为亟待解决的问题。本文系统分析了开发适用于我国燃煤电站的深度脱除技术的必要性以及存在的问题，重点分析研究了PM_2.5脱除技术、全负荷下超超临界锅炉的低NO_x排放以及SCR工作温度的适应性。最后，以某电厂2×660 MW超临界机组为例，介绍了烟气污染物深度脱除系统方案，以此为基础，分析提出了1 000 MW超超临界机组烟气污染物深度脱除的技术路线。

关键词：燃煤机组烟气污染物深度脱除 PM2.5脱除

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秦山三期（重水堆）核电站工程建设和重大技术创新

中核集团秦山第三核电有限公司

《中国工程科学》 2008年第10卷第3期页码 73-86

摘要：

秦山三期重水堆核电站是我国首座商用重水堆核电站，也是中国和加拿大两国政府间迄今最大的贸易项目。业主秦山第三核电有限公司在工程建设、调试及自主运行的过程中，坚持自主创新管理，有效实施工程质量、进度和投资三大控制；并在消化吸收CANDU-6技术的基础上进行改进，提高机组的安全性和可靠性。工程的建设实践，使我国核电工程管理在已有的基础上，基本实现了程序化、信息化的规范管理并与国际接轨。工程建成后，在保证机组安全稳定运行的基础上又进行了多项技术改进和创新，使机组性能持续提高。在人才培养方面，注重培育企业文化，强化人员培训，建立起员工培训与工程建设互相促进的良性循环机制。秦山三期工程在核电项目管理水平的提高和发展，可为推动我国核电发展和大型引进工程的规范化管理提供借鉴。

关键词：秦山三期重水堆核电站工程建设技术创新

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Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

《能源前沿（英文）》 2015年第9卷第4期页码 426-432 doi: 10.1007/s11708-015-0376-4

摘要： The aim of this paper is simultaneous minimization of hydrothermal units to reach the best solution by employing an improved artificial bee colony (ABC) algorithm in a multi-objective function consisting of economic dispatch (ED) considering the valve-point effect and pollution function in power systems in view of the hot water of the hydro system. In this type of optimization problem, all practical constraints of units were taken into account as much as possible in order to comply with the reality. These constraints include the maximum and minimum output power of units, the constraints caused by the balance between supply and demand, the impact of pollution, water balance, uneven production curve considering the valve-point effect and system losses. The proposed algorithm is applied on the studied system, and the obtained results indifferent operating conditions are analyzed. To investigate in various operating conditions, different load profiles in 12 h are taken into account. The obtained results are compared with those of the other methods including the genetic algorithm (GA), the Basu technique, and the improved genetic algorithm. Fast convergence is one of this improved algorithm features.

关键词： practical constraints of units pollution function inlet steam valve up-ramp rate of units improved ABC algorithm

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核电站全生命周期数据管理框架体系构建与发展建议

任景莉,杨盼

《中国工程科学》 2022年第24卷第2期页码 152-159 doi: 10.15302/J-SSCAE-2022.02.012

摘要：

核工业正在经历数字化、智能化变革，核电数据呈指数型增长，数据逐渐成为核电站的重要资产，然而缺少贯穿核电站全生命周期的数据管理体系。本文综述了我国核电站全生命周期数据管理的研究现状，剖析了核电站全生命周期数据管理面临的需求与挑战，构建了围绕核电站全生命周期各个节点和业务流的数据管理框架。研究认为，建立核电站全生命周期数据管理体系当务之急是推进核电行业全面数字化，规范统一核电站全生命周期数据标准；依据数据类型对全生命周期数据进行分类管理，合理设计数据模型；科学制定数据质量管控政策、数据质量度量标准，确保核电站全生命周期数据安全。为此建议，加快建立数据一体化平台，对核电站中物项、业务数据、三维仿真数据等进行目录化组织，促进跨业务系统间数据的互联互通；将区块链技术应用到核电站全生命周期数据管理，实现核电站全生命周期数据的真实可溯；加强核电与数字孪生技术、基于模型的系统工程方法的融合应用，提高核电站智能化发展水平；建立健全核电站数据绿色管理政策体系，实现数据中心的低碳、高效、可持续发展。

关键词：数字化转型核电站全生命周期数据管理框架体系