共查询到18条相似文献,搜索用时 62 毫秒
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燃气轮机进气蒸发冷却装置经济效益的论证 总被引:10,自引:4,他引:10
介绍美国唐纳森公司生产的蒸发冷却装置应用于251B11燃气轮发电机组中,对提高燃气轮发电机组及联合循环发电机组输出功率和热效率及对提高燃机电厂发电生产的经济效益的作用。 相似文献
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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。 相似文献
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燃气轮机进气制冷技术 总被引:17,自引:2,他引:15
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。 相似文献
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The potential of using thermal energy storage (TES) in the form of ice or chilled water to cool gas turbine inlet air is evaluated for a remote oil field location in the Sultanate of Oman using local hourly typical meteorological year weather data. It is found that under the conditions investigated seasonal TES in chilled water storage tanks or ice bins for the location considered is prohibitively expensive and thus not recommended. Application of partial TES option shows that the cool storage does not result in any noticeable reduction in the chiller size. Hence, TES whether seasonal, partial, or full storage is not a viable option for the considered location, especially in the absence of time‐of‐use utility rate structure. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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In this paper, a new approach to enhance the performance of gas turbines operating in hot climates is investigated. Cooling the intake air at the compressor bell mouth is achieved by an air Brayton refrigerator (reverse Joule Brayton cycle) driven by the gas turbine and uses air as the working fluid. Fraction of the air is extracted from the compressor at an intermediate pressure, cooled and then expands to obtain a cold air stream, which mixes with the ambient intake. Mass and energy balance analysis of the gas turbine and the coupled Brayton refrigerator are performed. Relationships are derived for a simple open gas turbine coupled to Brayton refrigeration cycle, the heat rejected from the cooling cycle can be utilized by an industrial process such as a desalination plant. The performance improvement in terms of power gain ratio (PGR) and thermal efficiency change (TEC) factor is calculated. The results show that for fixed pressure ratio and ambient conditions, power and efficiency improvements are functions of the extraction pressure ratio and the fraction of mass extracted from the air compressor. The performance improvement is calculated for ambient temperature of 45°C and 43.4% relative humidity. The results indicated that the intake temperature could be lowered below the ISO standard with power increase up to 19.58% and appreciable decrease in the thermal efficiency (5.76% of the site value). Additionally, the present approach improved both power gain and thermal efficiency factors if air is extracted at 2 bar which is unlike all other mechanical chilling methods. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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《International Journal of Thermal Sciences》2002,41(9):815-822
The cooling of the inlet air in gas turbines is a practice used to improve power performances. In the past, the authors suggested extending this practice to STIG turbines, using some of the heat generated in the back boiler to supply the absorption systems. Positive results have prompted further developments. For the purpose of verifying the positive effects of compression air cooling in STIG turbines, a calculation model has been developed and studied specifically for gas turbines and STIG turbines. The model has been applied to the Allison 501 KH turbine.In addition to focusing on the two traditional techniques used to cool the air of the compression system through an absorption unit and an intercooling unit, the present work emphasizes the advantages of using an ejection cooling system. The availability of exhaust heat from the STIG turbines prompted the idea of cooling through a double ejection system. Water cannot be used as a primary refrigerant in compression cooling systems because of the very low pressures that have to be reached, whereas the ejection system used for steam compression allows for the use of water. Moreover, the ejection system is relatively easy to design and construct. The use of this cooling system, enables good results to be obtained in terms of the ejection system's coefficient of performance and consequently of the STIG turbine's performance. 相似文献