燃气轮机进气制冷装置的理论依据和实际效能

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。     

燃气轮机进气冷却系统研制

燃气轮机的性能受到环境温度的影响,高温时其出力随进入燃机的空气温度升高而降低的问题可通过进气冷却来解决.提出了一种燃气轮机进气冷却系统的设计方案,介绍了一种双工况燃气轮机进气冷却系统以及使用西门子工控软件WinCC与STEP7对监控系统的设计.运行结果表明,该进气冷却系统具有显著的经济效益.     

进气冷却对燃机联合循环的性能影响分析

  [目的]  为了提高联合循环电厂运行灵活性,保证较好的机组运行经济性,避免燃气轮机在低效运行区,对燃机的进气冷却系统进行分析研究。  [方法]  基于GT-Pro/GT-Master软件,通过对采用进气冷却系统前后的燃机联合循环机组进行热平衡模拟计算,对机组的性能变化以及影响因素进行研究、对机组效率进行敏感性分析。  [结果]  分析结果表明:进气冷却系统可以大幅提高燃机的出力和效率;采用进气冷却系统后联合循环机组的出力增加,但效率略有下降。  [结论]  因此,对于联合循环机组,若电网允许机组多发电,则可以考虑设置进气冷却系统;若机组全年总出力固定,且年利用小时数并不饱满,则不宜设置进气冷却系统。     

板翅式换热器在燃气轮机进气冷却系统中的应用

将板翅式换热器应用于吸收式燃气轮机进气冷却系统中，降低燃气轮机压缩机进口温度，提高燃气轮机高温条件下的出力，在国内尚无先例。针对板翅式换热器，简要介绍了结构、布置形式和性能。通过实测的运行数据，对板翅式换热器和管式换热器的性能进行了对比。结果表明：板翅式换热器在传热系数、体积、进气阻力等方面，性能优于管式换热器，是一种值得发展的换热设备。最后提出了该板翅式换热器在实际应用中存在的一些问题及对应的处理方法。     

燃气轮机进气制冷技术

本文根据燃气轮机性能曲线,利用余热锅炉后的剩余余热,作为溴化锂制冷机组的热源,对燃机进气进行冷却,达到增大出力、降低能耗的双重效益。     

燃气轮机进气雾化式蒸发冷却控制技术研究

大气环境温度对燃气轮机性能的影响很大,加装燃气轮机进气雾化冷却系统对改善燃气轮机性能具有很高的实用价值.通过对燃气轮机进气雾化冷却工作原理的分析,提出了一种基于PLC的燃气轮机进气雾化冷却控制系统的设计方案以及功能实现.运行结果表明,该控制系统自动化程度高,工作稳定性好,性能可靠.配置控制系统的燃气轮机进气雾化式冷却撬体投运后,PG6551(B)型燃气轮机功率相对增加8.35%,效率相对提高3.24%.     

进气冷却对LM6000PF燃气轮机夏季运行负荷的提升

分布式燃气轮机以热效率高、启停快、运行灵活、调峰能力强等优点在电力系统中的应用日益广泛。 在夏季高温时段电网需要燃气轮机以最大出力顶峰发电，随着大气温度的升高，燃气轮机出力却有相当大的 下降，经济性受到极大的影响。本文介绍华润电力常州有限公司利用燃气轮机产生的烟气，在锅炉受热面进 行热交换，排气作为溴化锂机组的热源，溴化锂机组向燃气轮机进气冷却装置提供冷水，在环境温度高时增 加燃气轮机出力和节能降耗。     

AE94.3A型燃气轮机进气冷却的应用可行性研究

对AE94.3A型燃气轮机燃气-蒸汽联合循环热力系统平衡进行研究进而发现,与同类型、同等级不同型号机组相比,AE94.3A型联合循环机组余热锅炉的排烟温度较高,排烟余热仍有进一步利用的空间。通过设计优化,扩大省煤器受热面,回收烟气余热加热给水,驱动热水型溴化锂制冷机制冷,用于机组满负荷调峰时的压气机进气冷却或厂房及办公区域空调供冷,对改善燃气轮机联合循环的运行性能,实现能源梯级利用,提高能源利用率和机组经济性运行起到了很大作用。     

基于余热利用的燃气轮机进气暖风技术研究

提出了基于余热利用的燃气轮机进气暖风系统技术方案,分析了燃气轮机部分负荷下压气机进气温度对燃气轮机热效率的影响,阐述了采用余热利用技术提高联合循环机组经济性的原理,并完成了燃气轮机部分负荷下投/切燃气轮机进气暖风系统的节能量评估和暖风器的优化设计.结果表明:在燃气轮机部分负荷下采用余热利用技术可使压气机进气温度提高7....     

超临界蒸汽参数卧式余热锅炉概念设计与分析

提出了超临界余热锅炉双层烟道卧式结构,并根据高压直流蒸发管束的传热系数、烟气阻力和钢材消耗量选取了余热锅炉烟道高度,同时以397 MW燃气轮机为燃气蒸汽联合循环的顶循环进行了热力性能计算。结果表明:超临界余热锅炉烟道宽度选取11.5m,上层烟道高度和下层烟道高度分别选取23m和21m;燃气轮机排气参数与余热锅炉排烟温度相等时,超临界蒸汽参数比亚临界蒸汽参数的联合循环出力增加了2.46%,联合循环净效率提高了1.16个百分点。     

Thermoeconomic optimization of an ice thermal storage system for gas turbine inlet cooling

The gas turbine power output and efficiency decrease with increasing ambient temperature. With compressor inlet air cooling, the air density and mass flow rate as well as the gas turbine net power output increase. The inlet cooling techniques include vapor or absorption refrigeration systems, evaporative cooling systems and thermal energy storage (TES) systems. In this paper the thermoeconomic analysis of ice (latent) thermal energy storage system for gas turbine inlet cooling application was performed. The optimum values of system design parameters were obtained using genetic algorithm optimization technique. The objective function included the capital and operational costs of the gas turbine, vapor compression refrigeration system, without (objective function I) and with (objective function II) corresponding cost due to the system exergy destruction. For gas turbines with net power output in the range of 25-100 MW, the inlet air cooling using a TES system increased the power output in the range of 3.9-25.7%, increased the efficiency in the range 2.1-5.2%, while increased the payback period from about 4 to 7.7 years.     

Maisotsenko循环在燃气轮机进气冷却中的应用研究

采用基于Maisotsenko循环的露点间接蒸发式冷却作为进气冷却的手段,研究了不同环境条件下其对燃气轮机性能的提升效果。建立了针对某9E级燃气轮机的热力循环过程的计算模型,并利用该热力模型分析了进气温度变化对燃机出力的影响。基于Maisotsenko循环的原理,以温降为指标对露点间接蒸发冷却器的性能进行了分析。以功率和效率作为指标,对燃气轮机性能随环境条件的变化情况做了数值模拟,对露点蒸发式冷却与无进气冷却、直接喷雾式冷却对燃机性能的影响进行了计算分析。结果表明,在高温低湿度的条件下,露点间接蒸发式冷却能有效提升燃机性能。     

Analysis of parameters affecting the performance of gas turbines and combined cycle plants with vapor absorption inlet air cooling

The integration of an aqua‐ammonia inlet air‐cooling scheme to a cooled gas turbine‐based combined cycle has been analyzed. The heat energy of the exhaust gas prior to the exit of the heat recovery steam generator has been chosen to power the inlet air‐cooling system. Dual pressure reheat heat recovery steam generator is chosen as the combined cycle configuration. Air film cooling has been adopted as the cooling technique for gas turbine blades. A parametric study of the effect of compressor–pressure ratio, compressor inlet temperature, turbine inlet temperature, ambient relative humidity, and ambient temperature on performance parameters of plants has been carried out. It has been observed that vapor absorption inlet air cooling improves the efficiency of gas turbine by upto 7.48% and specific work by more than 18%, respectively. However, on the adoption of this scheme for combined cycles, the plant efficiency has been observed to be adversely affected, although the addition of absorption inlet air cooling results in an increase in plant output by more than 7%. The optimum value of compressor inlet temperature for maximum specific work output has been observed to be 25 °C for the chosen set of conditions. Further reduction of compressor inlet temperature below this optimum value has been observed to adversely affect plant efficiency. Copyright © 2013 John Wiley & Sons, Ltd.     

Analysis of gas turbine operating parameters with inlet fogging and wet compression processes

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.     

Comparison of evaporative inlet air cooling systems to enhance the gas turbine generated power

The gas turbine performance is highly sensitive to the compressor inlet temperature. The output of gas turbine falls to a value that is less than the rated output under high temperature conditions. In fact increase in inlet air temperature by 1°C will decrease the output power by 0.7% approximately. The solution of this problem is very important because the peak demand season also happens in the summer. One of the convenient methods of inlet air cooling is evaporating cooling which is appropriate for warm and dry weather. As most of the gas turbines in Iran are installed in such ambient conditions regions, therefore this method can be used to enhance the performance of the gas turbines. In this paper, an overview of technical and economic comparison of media system and fog system is given. The performance test results show that the mean output power of Frame‐9 gas turbines is increased by 11 MW (14.5%) by the application of media cooling system in Fars power plant and 8.1 MW (8.9%) and 9.5 MW (11%) by the application of fog cooling system in Ghom and Shahid Rajaie power plants, respectively. The total enhanced power generation in the summer of 2004 was 2970, 1701 and 1340 MWh for the Fars, Ghom and Shahid Rajaie power plants, respectively. The economical studies show that the payback periods are estimated to be around 2 and 3 years for fog and media systems, respectively. This study has shown that both methods are suitable for the dry and hot areas for gas turbine power augmentation. Copyright © 2007 John Wiley & Sons, Ltd.     

应用溴化锂吸收式制冷技术提高燃气轮机电站发电效率的研究

对燃气轮机进口的空气进行预冷,能够提高发电机组的输出功率。与蓄冷方法相比,使用燃气轮机－蒸汽联合循环电站余热锅炉低压蒸发器的一部分蒸汽为热源,利用溴化锂吸收式制冷机制取冷源,冷却燃气轮机进口处的空气,以提高发电机组的输出功率,该方法技术可行,经济效益显著。     

纯低温余热发电系统的优化分析

通过建立纯低温余热发电系统的热力学模型,计算分析了过热蒸汽压力、进口烟气温度和节点温差等因素对纯低温余热发电系统发电性能的影响.结果表明:在设计纯低温余热发电系统时,存在一优化过热蒸汽压力,使得纯低温余热发电系统的单位烟气发电功率最大;随着进口烟气温度的升高,系统单位烟气发电功率增大,对应的优化过热蒸汽压力升高;而随着节点温差的增大,系统单位烟气发电功率减小,对应的优化过热蒸汽压力降低.