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文章基于相似理论方法分析燃气轮机变工况性能,提出采用一流量修正系数修正参考工况点的无因次准则数,用来模拟燃气轮机共同工作线,并对一增压流化床联合循环电站的燃气轮机机组由于环境状况和负荷要求变化引起的变工况分别作了示例计算,结果表明本方法可以用作缺乏设备详细性能特性时,燃气轮机变工况性能的近似估算。 相似文献
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燃气轮机进气制冷装置的理论依据和实际效能 总被引:1,自引:0,他引:1
从燃气轮机的循环比功和有用功系数的理论分析可知,降低燃气轮机进气温度,对提高燃气轮机出力和热效率起到事半功倍的作用。深圳金岗电厂PG6531B型50MW燃气-蒸汽联合循环机组,利用余热锅炉烟气的余热采用溴化锂制冷机组,降低燃气轮机进气温度,使联合循环机组实际出力提高3500kW,热效率提高2%,取得了可观的经济效益。 相似文献
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端面齿应用在重型燃气轮机拉杆转子轮盘连接中是重要的传扭部件.对于特殊齿形结构的端面齿连接段刚度,很难通过传统工程方法得到.针对真实某型燃气轮机轮盘端面齿结构,提出端面齿连接段模化方法.基于有限元软件ANSYS,采用ANSYS ICEM建立三维周期对称有限元接触模型和整体模型,运用有限元方法和应变能理论,提出拉伸刚度修正系数和扭转刚度修正系数以表征端面齿不连续连接段刚度.考虑实际机组的运行工况,采用三维有限元计算在不同预紧力和扭矩下的应变能,得到拉伸刚度修正系数和扭转刚度修正系数.所得结论可为燃气轮机拉杆转子模化提供理论依据和方法. 相似文献
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在以往的工作基础之上,对最新的联合循环机组的价格进行分析,采用TableCurve 3D软件,拟合出基本公式,采用理论分析加以修正,得到最终的估价方程,即联合循环机组价格随低热值效率与机组总功率变化之间的关系方程。 相似文献
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燃气轮机再热被认为可以提高效率和比功。本文基于准一维透平连续膨胀冷却模型和底循环简明估算模型对再热燃气轮机联合循环进行热力性能研究,以GT-26燃气轮机为基准分析了循环总压比、燃烧室出口温度、再热压力等关键参数对联合循环热力性能的影响特性,并与无再热燃气轮机的联合循环性能进行了比较。研究表明:不同燃烧室出口温度下的再热燃气轮机联合循环效率最大值对应的循环总压比相差不大;不同燃烧室出口温度和循环总压比下,联合循环效率对应的最佳高压透平膨胀比不同。当燃烧室出口温度为1 683 K时,在各自的效率最佳压比下,再热燃气轮机联合循环比无再热燃气轮机的联合循环效率提高了1.34个百分点,同时比功提高了33.2%。 相似文献
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燃气轮机以其高效率、低污染、运行成本低的优点被广泛应用于分布式发电系统中。为了进一步提升天然气资源的利用率,本文提出了带回热的燃气轮机-有机朗肯(ORC)联合循环,以高临界温度的有机物为底循环工质,来回收燃气轮机排气中的余热。建立了带回热的燃气轮机-ORC联合循环的模型,提出了使该联合循环热效率最优的热力设计方法,进行了不同设计条件下的仿真试验。结果表明,与传统的燃气-蒸汽动力循环相比,带回热的燃气轮机-ORC联合循环具有更高的联合循环热效率。选择甲苯作为底循环工质,可以获得最高的联合循环效率。此外,燃气轮机-ORC联合循环可以用于热电联供,同时满足区域电负荷和热负荷的要求。 相似文献
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燃气轮机是21世纪乃至更长时间内能源高效转换与洁净利用系统的核心动力装备.介绍了燃气轮机的发展现状及其在热电联产工程中的应用,简述了联合循环和简单循环燃气轮机电厂的基本组合方式,并列举了目前应用在热电联产工程中的几种主要的燃气轮机.阐述了燃气轮机相对于常规火电机组的优点,分析了影响燃气轮机在热电联产工程中推广的因素,并对我国燃气轮机的发展前景进行了展望. 相似文献
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电厂热电负荷优化分配是指在全厂总调度负荷下,根据各机组的热力性能确定各机组应承担的热电负荷,使得全厂效益最大或能耗最小的一种最优化问题.不同于燃煤热电厂,燃机电厂9F型机组由于设计为燃气轮机加蒸汽轮机的组合方式运行,因此在联合循环热力性能模型建立上较为复杂.提出了将余热锅炉新蒸汽参数作为中间变量,建立了机组天然气燃料消耗与电负荷、热负荷之间的关系模型,确定了优化计算的目标函数和边界约束条件,并采用非线性规划方法求解.模拟与实际运行结果均表明,该优化分配方法能有效降低燃机电厂燃料消耗水平,可以为同类型燃机电厂热电负荷优化分配提供参考. 相似文献
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风电与燃气轮机发电互补系统结构与容量配比的研究 总被引:1,自引:0,他引:1
对在我国新疆地区采用风力发电与燃气轮机发电组成的互补发电系统的结构和在一定风能资源条件下两种发电系统的容量配比进行了研究。论文首先针对实测的新疆达坂城风电场的风速数据,采用整体风电场功率输出模型,得到了风电场的输出与分布。根据实际的风电场输出负荷,设计了互补中燃气轮机的几种方案。针对燃气轮机的部分负荷运行特点,设计了不同方案的互补运行规则。最后根据不同运行规则,计算了互补系统的整体特性,得到了在一定条件下风电与燃气轮机发电较合适的容量配比。 相似文献
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The paper measures the variation of the electricity price in Italy within the next 10 years due to the recent investment flow in combined cycle gas turbine (CCGT) power plants. It starts by investigating the possibility of decoupling gas and oil prices on the basis of hypotheses about the amount of existing resources and plausible technical substitutability assumptions of the latter with the former. In particular, it is supposed that, in the Italian market, natural gas will play a crucial role which oil has had in power generation. The price of electricity stemming from natural gas is then calculated taking into account the role of the power mix restructuring that derives from the CCGT power plants investments. Under reasonable assumptions, it is shown that a net reduction of at least 17% on the electric price is likely to be expected. 相似文献
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两段粉煤循环流化床气化燃烧技术是石油大学吸收国内外先进煤气化技术开发的,将产生的煤气经过处理,作为燃气发电机组燃料发电,进行热电联供,提高能源的利用效率,降低燃油费用,实现清洁生产。本文以一台煤气发动机为例,进行热电联供以及余热计算。 相似文献
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Ming Liu P.V. AravindT. Woudstra V.R.M. CobasA.H.M. Verkooijen 《Journal of power sources》2011,196(17):7277-7289
A detailed system study on an integrated gasifier-SOFC test system which is being constructed for combined heat and power (CHP) application is presented. The performance of the system is evaluated using thermodynamic calculations. The system includes a fixed bed gasifier and a 5 kW SOFC CHP system. Two kinds of gas cleaning systems, a combined high and low temperature gas cleaning system and a high temperature gas cleaning system, are considered to connect the gasifier and the SOFC system. A complete model of the gasifier-SOFC system with these two gas cleaning systems is built and evaluated in terms of energy and exergy efficiencies. A sensitivity study is carried out to check system responses to different working parameters. The results of this work show that the electrical efficiencies of the gasifier-SOFC CHP systems with different gas cleaning systems are almost the same whereas the gasifier-SOFC CHP systems with the high temperature gas cleaning system offers higher heat efficiency for both energy and exergy. 相似文献
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Combined cooling and heating using a gas engine in a supermarket 总被引:1,自引:0,他引:1
This paper reports the results of an investigation into the practical and economic viability of an integrated combined heating and cooling system in a supermarket. This system consists of a direct-drive screw compressor, which is powered by a throttle controlled gas engine. The waste heat from the engine is used to provide hot water for space heating and for general usage within the catering and toilet facilities in the supermarket. In this paper, the working principle of the novel system is first described. This details how the gas engine system may be integrated into the typical supermarket. The paper then describes a model, which is used to simulate the energy consumption of the supermarket. This is used to calculate the energy consumed by the conventional system and that used by a number of alternative combined heating and cooling system configurations, which are also described. The additional capital cost of each configuration is estimated and this is used to calculate the payback period. The results show that a payback period of 4.2 years may be achieved with a system that uses approximately 500,000 kWh per annum less primary energy than a conventional system. Finally, comparison between this system and a traditional Combined Heat and Power (CHP) installation is given. 相似文献