共查询到19条相似文献,搜索用时 171 毫秒
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为分析供热机组的真实供热能耗,建立了以相同发电量凝汽机组为参比状态的供热机组能耗分析方法——参比机组法,获得了该方法与热量法、?方法供热能耗计算结果的定量差异,进而采用参比机组法,分析了热网循环水泵驱动方式对机组供热能耗的影响。研究发现:热负荷或电负荷固定时,热量法计算的供热煤耗率较参比机组法高,?方法计算的供热煤耗率与参比机组法较为接近,差值在–1.61~4.21 kg/GJ。当综合评估供热煤耗、电耗的总量时,热网循环泵采用汽泵供热机组的总煤耗量比采用电泵供热机组低0.23~0.32 t/h,汽泵供热机组供热煤耗率低于电泵供热机组。 相似文献
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吸收式热泵补偿供热是实现供热机组热电解耦的重要方法,为了确保吸收式热泵供热机组的安全稳定运行,本文在深入分析吸收式热泵补偿供热原理的基础上,提出一种吸收式热泵供热机组安全区的计算方法。首先计算背压提升后抽汽式供热机组的安全区;然后考虑吸收式热泵补偿供热对供热安全区的影响,基于吸收式热泵的设计参数,给出吸收式热泵供热安全区的计算方法,并与原抽汽式供热机组安全区进行对比。采用某330 MW抽汽式供热机组进行对比验证,结果表明:吸收式热泵补偿供热能够大幅提升供热机组的供热解耦能力、发电解耦能力和深度调峰能力,但吸收式热泵正常运行对背压的需求会使得机组最低技术出力略有增加。 相似文献
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凝汽器半面纯凝半面低真空供热的可行性分析 总被引:1,自引:0,他引:1
锡林浩特二电厂将纯凝汽式机组改造为低真空供热机组,采用凝汽器半面纯凝半面低真空供热的运行方式,经试验测试和实际运行,机组的各项指标均在规定范围之内,供热参数也达到了设计要求,取得了良好的社会效益和经济效益。 相似文献
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100MW机组连通管打孔抽汽供热改造方案与实施 总被引:1,自引:0,他引:1
介绍了北京高井热电厂100MW纯凝汽式汽轮机的供热改造方案,在保证汽轮机的安全性,并兼顾机组以后进行通流改造时与现有供热系统和设备相匹配的前提下,实施了连通管打孔抽汽供热改造。分析了供热改造对机组高低压缸的影响,进行了机组安全校核计算,并设置了相应保护,如低压缸最小流量控制、DN1000快关调节蝶阀控制等。改造后电厂的热经济性大大提高,1台机组一年可节省约1178.4万元。 相似文献
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探讨了凝汽式电厂改造为热电联产电厂的四种方法;开非调整抽汽口,利用抽汽供热;低真空运行,利用循环水供热;改为抽汽凝汽式汽轮机组,利用抽汽供热,改为背压式汽轮机组,利用排汽供热,并对其进行简要分析。 相似文献
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中国东北地区,供热机组在总装机容量中占有相当大的比重,冬季采暖季节,在风电大规模并网条件下,电网低谷调峰压力巨大。为了缓解冬季电网调峰压力,合理安排电量计划,研制开发了“以热定电”在线监测系统。基于供热机组以热定电的在线监测系统,核定了供热机组调峰负荷的边界条件;通过汽轮机变工况计算,确定不同抽汽量下电负荷调峰范围的数学模型,同时考虑汽轮机实际运行效率的修正及初终参数变化对发电功率的修正。通过实例计算验证该方法以热定电数学模型的准确性,为此该方法更符合机组的实际运行状况,对电网公司安排交易计划、调峰及最大限度地吸纳风电起到指导性作用。 相似文献
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为适应现阶段节约能源、合理利用能源的目标,更好地降低区域供热管网运行成本的需要,以理论研究为基础,结合实际的区域供热管网,利用MATLAB/SIMULINK对动态系统进行仿真建模,具体分析区域供热管网的运行状态,建立了区域供热管网水力工况模拟与仿真,通过仿真模型对区域供热管网进行直接的观察和调节,使区域供热管网更优化的运行,以使用户获得高品质的热能,达到最大程度的能源节约。 相似文献
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以阳泉第二发电厂新建工程为例 ,介绍了厂区供热管网中波纹管补偿器的设计及应用情况。给出了波纹管补偿器对固定支架的推力计算方法 ,并指出了在电厂供热管网中使用波纹管补偿器应注意的问题。 相似文献
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Heat supply is the most energy-consuming sector of the economy. Approximately 30% of all used primary fuel-and-energy resources is spent on municipal heat-supply needs. One of the key indicators of activity of heat-supply organizations is the reliability of an energy facility. The reliability index of a heat supply organization is of interest to potential investors for assessing risks when investing in projects. The reliability indices established by the federal legislation are actually reduced to a single numerical factor, which depends on the number of heat-supply outages in connection with disturbances in operation of heat networks and the volume of their resource recovery in the calculation year. This factor is rather subjective and may change in a wide range during several years. A technique is proposed for evaluating the reliability of heat-supply organizations with the use of the simple additive weighting (SAW) method. The technique for integrated-index determination satisfies the following conditions: the reliability level of the evaluated heat-supply system is represented maximum fully and objectively; the information used for the reliability-index evaluation is easily available (is located on the Internet in accordance with demands of data-disclosure standards). For reliability estimation of heat-supply organizations, the following indicators were selected: the wear of equipment of thermal energy sources, the wear of heat networks, the number of outages of supply of thermal energy (heat carrier due to technological disturbances on heat networks per 1 km of heat networks), the number of outages of supply of thermal energy (heat carrier due to technologic disturbances on thermal energy sources per 1 Gcal/h of installed power), the share of expenditures in the cost of thermal energy aimed at recovery of the resource (renewal of fixed assets), coefficient of renewal of fixed assets, and a coefficient of fixed asset retirement. A versatile program is developed and the analysis of heat-supply organizations is performed by the example of the Republic of Tatarstan. The assessment system is based on construction of comparative ratings of heat-supply organizations. A rating is the assessment of reliability of the organization, is characterized by a numerical value, and makes it possible to compare organizations engaged in the same kind of activity between each other. 相似文献
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为缓解火电厂发电利用小时少的问题,部分供热机组进行了灵活性切缸供热节能改造.为确保抽出更多高压蒸汽和低压乏汽用于扩大供热需求和提高灵活性调峰能力,机组需要在冬季更低设计背压3 kPa运行,已有机组的空冷系统抽真空管道不能满足要求,通过对抽真空系统在不同管段处的管径进行调整和方案组合,经阻力计算比较后,得出一组满足抽真空... 相似文献