共查询到18条相似文献,搜索用时 546 毫秒
1.
2.
3.
4.
从工程热力学和传热传质学基本原理出发,给出了理想湿压缩的定义,研究了湿压缩对压气机性能的影响,并把计算结果与实验进行对比,得出可以通过湿压缩来减少压缩功以改善燃气轮机的性能,为湿压缩技术的可实现性提供了依据。 相似文献
5.
湿压缩技术是提升现代高性能燃气轮机输出功率与效率的主要手段之一。综述了国内外燃气轮机 湿压缩技术的研究进展与应用状况,阐述了湿压缩过程中液滴蒸发特性、运动规律、与固壁作用机制、与空气
传热传质机理以及液滴参数对压气机总体性能和稳定运行范围的影响规律等,同时对燃气轮机湿压缩系统 、雾化
方法、喷嘴结果以及系统应用状况进行了相关论述与分析。基于当前研究热点和发展趋势,结合作者对
燃气轮机领域各种技术的持续关注,提出了压气机整机湿压缩全三维数值模拟与实验测量、液滴迁移与蒸发
规律、湿压缩各主要部件性能匹配方法、喷嘴雾化各影响影响因素的关系四个应重点关注的研究方向。 相似文献
6.
为了抑制高温进汽水蒸气压缩过程的温度升高,可以采用湿压缩方式,利用水滴升温显热和汽化潜热来降低压缩终了的排汽温度,改善压缩机工作性能。本文通过对两相湿压缩过程的分析,建立水蒸气基元容积两相湿压缩过程数学模型。根据所建立的模型,采用数值模拟的方法对螺杆压缩机压缩水蒸气过程进行了计算,并分析了湿蒸汽进汽千度及水滴微粒直径对排汽温度和压缩功率的影响。 相似文献
7.
湿压缩技术能够使燃气轮机在一定程度上达到节能减排的效果,但喷水后引入的附加损失使湿压缩效果趋于不利,需要对湿压缩特性以及该技术可能带来的负面作用进行分析研究。利用CFX软件对某型三级轴流压气机在设计工况下的湿压缩进行全三维数值模拟,分析湿压缩对压气机性能的影响。结果表明,湿压缩能够有效降低压气机出口温度,且应用在压力较高的叶栅流道内更具有优势;湿压缩应用在该低压轴流压气机中存在明显的负面作用。 相似文献
8.
将湿压缩方法用于HAT循环,构造了湿压缩HAT循环,对循环进行了整体优化,并分析了循环的性能特点和规律。 相似文献
9.
10.
11.
汽轮机压力匹配器在热电联产中的应用 总被引:3,自引:0,他引:3
介绍了汽轮机压力匹配器及采用其和抽汽机、背压机、后置机联合运行,提高热电厂运行效率的实践。并结合工艺流程图,对这三种联合运行方式进行了技术经济分析。 相似文献
12.
13.
湿压缩燃气轮机热力循环的特点与机理分析 总被引:4,自引:0,他引:4
介绍了湿压缩燃气机的特点和增加循环功的机理,讨论了喷水位置对压缩过程的影响,针对理论分析和实验结果中喷水引起各参数变化规律做了总结和机理分析,提出了对燃气轮机喷水的限制因素。 相似文献
14.
15.
Inlet fogging has been widely noticed in recent years as a method of gas turbine air inlet cooling for increasing the power output in gas turbines and combined cycle power plants. The effects of evaporative cooling on gas turbine performance were studied in this paper. Evaporative cooling process occurs in both compressor inlet duct (inlet fogging) and inside the compressor (wet compression). By predicting the reduction in compressor discharge air temperature, the modeling results were compared with the corresponding results reported in literature and an acceptable difference percent point was found in this comparison. Then, the effects of both evaporative cooling in inlet duct, and wet compression in compressor, on the power output, turbine exhaust temperature, and cycle efficiency of 16 models of gas turbines categorized in four A–D classes of power output, were investigated. The results of this analysis for saturated inlet fogging as well as 1% and 2% overspray are reported and the prediction equations for the amount of actual increased net power output of various gas turbine nominal power output are proposed. Furthermore the change in values of physical parameters and moving the compressor operating point towards the surge line in compressor map was investigated in inlet fogging and wet compression processes. 相似文献
16.
介绍了一种利用发动机废热裂解甲醇,将裂解气引入涡轮膨胀冷却后燃烧的新型循环,并建立物理数学模型,利用SHBWR方程及其混合规则描述流体及流体混合物状态,研究了甲醇操作压力、操作温度等对甲醇裂解气作功能力的影响,讨论了裂解气涡轮与发动机耦合时的调节与优化。 相似文献
17.
18.
Large-capacity compressors in industrial plants and the compressors in gas turbine engines consume a considerable amount of power. The compression work is a strong fimction of the ambient air temperature. This increase in compression work presents a significant problem to utilities, generators and power producers when electric demands are high during the hot months. In many petrochemical process industries and gas turbine engines, the in- crease in compression work curtails plant output, demanding more electric power to drive the system. One way to counter this problem is to directly cool the inlet air. Inlet fogging is a popular means of cooling the inlet air to air compressors. In the present study, experiments have been performed to investigate the suitability of two-fluid nozzle for inlet fogging. Compressed air is used as the driving working gas for two-fluid nozzle and water at am- bient conditions is dragged into the high-speed air jet, thus enabling the entrained water to be atomized in a very short distance from the exit of the two-fluid nozzle. The air supply pressure is varied between 2.0 and 5.0 bar and the water flow rate entrained is measured. The flow visualization and temperature and relative humidity measurements are carried out to specify the fogging characteristics of the two-fluid nozzle. 相似文献