共查询到18条相似文献,搜索用时 218 毫秒
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以《张家港市热电联产规划(2011~2015)》为蓝本,从发展燃气-蒸汽联合循环热电联产、减少环境污染、节能减排入手,解读了张家港市热电联产实施方案及改善电源结构,走绿色电网可持续发展之路.通过分析张家港市的地区供热和电网现状、电力平衡,得出远期热负荷增加明显的片区是主城片区和城北片区.在对新增热负荷预测的基础上,提出整合主城片区现有热源点,关停供热覆盖范围内小锅炉,依托华兴电力有限公司建设2台F级400MW燃气热电联产机组,替代主城片区燃煤小热电是可行、合理的.这对满足地区可持续发展需要和节能减排,具有重要意义. 相似文献
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由于燃气-蒸汽联合循环热电联产机组具有热效率高、污染排放小、启动速度快、调峰性能好等优点,成为替代燃煤电厂的首选方案,近年来得到了广泛的应用普及,但由于核心技术资料少、运行经验不足,导致了机组运行效率低,增加了运行成本。本文主要以北京京西燃气热电有限公司的两套燃气-蒸汽联合循环机组为研究对象,分析供热季经济性优化方向,通过收集相关运行数据,充分利用“二拖一”机组和“一拖一”机组形式多样、方式灵活的优点,在“以热定电”条件下运用动态规划法、插值法和加权平均法,制定机组负荷分配组合优化方案,以便于在供热季运行中进行参考,取得提高机组经济性的效果。 相似文献
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为了提高能源利用效率,提高经济效益和环境效益,燃气一蒸汽联合循环热电联产系统已受到广泛的关注,目前国内大部分的联合循环机组均要求热电联供,为工业用汽或城市采暖提供蒸汽。本文介绍了东方汽轮机/三菱重工M701F4燃气轮机“二拖一”联合循环热电联供系统及其特点,分析了供热设计条件下该系统的热电负荷特性,供工程设计和电厂运行参考。 相似文献
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福建省热电联产经过近50年的发展,从企业自备发展成区域公用,从MW级发展到百万MW级,热电联产机组容量占比逐年提升。但也存在大型供热机组热电比低、以电养热,小型抽凝供热机组发电标煤耗高、综合热效率偏低的问题。从热电联产管理办法的实施角度,提出引导热电联产项目科学、合理、高效、经济的发展思路,以进一步提升福建省热电联产行业整体水平。 相似文献
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热电联产机组热经济性代表了热电厂能量利用水平、热功转换技术的先进水平和运行的经济水平,因而准确地分析热电联产机组热经济性显得尤为重要.等价煤耗法是把电厂实际发电效益和供热效益通过热、电等价转换,得到等价发电量,进而得到等价煤耗率.结合300 MW机组,首先分别用热量法、实际焓降法和等价煤耗法对热电联产机组煤耗率进行计算,并通过分析比较,证明了等价煤耗法在评价热电联产机组方面的可行性和准确性;其次比较了同一热电联产机组在供热期和非供热期的煤耗率——供热期煤耗率比非供热期煤耗率低,从而证明了热电联产机组在节能方面优于纯凝机组. 相似文献
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《Applied Thermal Engineering》2001,21(4):523-533
With the large penetration of the natural gas into the Brazilian energy structure, industries such as paper mills and chemical plants are analyzing the feasibility of implementing cogeneration schemes appropriate to this fuel. The analysis of the energy demand patterns of a chemical company from the photographic sector revealed the possibility of using combined cycles or diesel engine cogeneration schemes keeping the existing compression refrigeration units and steam or gas cycle cogeneration systems with absorption refrigeration units. In terms of economic attractiveness, an analysis based on the method of the internal rate of return was performed. The results indicated that the schemes composed by reciprocating engines and combined cycle with compression chillers, as well as the gas cycle scheme with absorption chiller, present return periods of up to 3 years, showing that the investment in cogeneration could be of interest for this plant. 相似文献
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《Energy》2004,29(8):1183-1205
This paper presents the engineering design and theoretical exergetic analyses of the plant for combustion gas turbine based power generation systems. Exergy analysis is performed based on the first and second laws of thermodynamics for power generation systems. The results show the exergy analyses for a steam cycle system predict the plant efficiency more precisely. The plant efficiency for partial load operation is lower than full load operation. Increasing the pinch points will decrease the combined cycle plant efficiency. The engineering design is based on inlet air-cooling and natural gas preheating for increasing the net power output and efficiency. To evaluate the energy utilization, one combined cycle unit and one cogeneration system, consisting of gas turbine generators, heat recovery steam generators, one steam turbine generator with steam extracted for process have been analyzed. The analytical results are used for engineering design and component selection. 相似文献
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介绍了东方先进型F级燃气-蒸汽联合循环供热机组成功应用于北京热电厂这一工程项目的设计特点和基本参数,对机组运行模式进行了简要描述,机组的性能试验结果明显优于合同保证值,验证了东方先进型F级燃气-蒸汽联合循环供热机组大容量、高效率、低污染和稳定可靠等特点. 相似文献
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针对东北地区350 MW供热机组湿冷系统循环水泵选型情况,结合华能大庆2×350 MW热电联产项目对寒冷地区供热机组循环水泵进行选型,结果表明,单级双吸卧式离心泵投资少、检修方便、运行可靠、运行成本低。 相似文献
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Enhancement of transient stability of an industrial cogeneration system with superconducting magnetic energy storage unit 总被引:1,自引:0,他引:1
Cheng-Ting Hsu 《Energy Conversion, IEEE Transaction on》2002,17(4):445-452
This paper has developed the coordination of load shedding scheme and superconducting magnetic energy storage (SMES) unit to enhance the transient stability of a large industry cogeneration facility. The load-shedding scheme and the tie line tripping strategy by using the frequency relays have been designed to prevent the power system from collapse when an external fault of utility power system occurs. An actual external fault case and a simulated internal fault case have been selected to verify the accuracy of the load shedding scheme by executing the transient stability analysis. To improve the frequency and voltage responses, an SMES unit with various control modes has been installed in the cogeneration system. The sensitivity analysis of the SMES unit with different parameters is applied to achieve better system responses. Besides, an SMES unit with active power deviation as feedback signal is also considered to improve the electric power fluctuation of the study plant with rolling mills. It is found that the SMES system will enhance the electric power quality and minimize the economic losses of the cogeneration facility due to unnecessary load shedding. 相似文献