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首页> 外文期刊>Journal of Energy Engineering >Energetic and Exergetic Performance Evaluation of a Gas Turbine-Powered Cogeneration System Using Reverse Brayton Refrigeration Cycle for Inlet Air Cooling
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Energetic and Exergetic Performance Evaluation of a Gas Turbine-Powered Cogeneration System Using Reverse Brayton Refrigeration Cycle for Inlet Air Cooling

机译：利用逆布雷顿制冷循环进行进气冷却的燃气轮机热电联产系统的能量和能量性能评估

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A conceptual gas turbine-powered cogeneration system is proposed where a reverse Brayton refrigeration cycle is employed for compressor inlet air cooling that can reduce the inlet air temperature close to 0 degrees C or lower, which cannot be achieved through evaporative and absorption inlet cooling techniques, respectively. The conservation of energy (first law of thermodynamics) and the quality of energy (second law of thermodynamics) are both investigated for the system under various operating conditions. The results indicated that both energetic and exergetic efficiencies of the cogeneration cycle are considerably varied with the change in the extraction pressure ratio, extracted mass rate, turbine inlet temperature, and process heat pressure, and least affected by the ambient relative humidity. Exergy analysis of the proposed cogeneration shows that maximum exergy is destroyed during the combustion and steam generation process, which represents more than 87% of the total exergy destruction in the overall cogeneration cycle. Comparison of the cogeneration and noncogeneration cycle shows that the first-law and second-law efficiencies of the cogeneration cycle are 64 and 40% higher than the efficiencies of the noncogeneration cycle for a given extraction pressure ratio. Further, it is shown that the gas-turbine cycle coupled with the reverse Brayton refrigeration cycle for inlet air cooling provides higher energy efficiency than the gas turbines coupled with other commonly used inlet air-cooling systems. The results provide information about the research and development priorities in the future for gas-turbine performance enhancement.
机译：提出了一种概念性的以燃气轮机为动力的热电联产系统，其中采用逆布雷顿制冷循环进行压缩机进气冷却，可以将进气温度降低至接近0摄氏度或更低，而这是通过蒸发和吸收进气冷却技术无法实现的，分别。系统在各种运行条件下均研究了能量守恒（热力学第一定律）和能量质量（热力学第二定律）。结果表明，热电联产循环的能量效率和能量效率都随抽气压力比，抽气质量率，涡轮入口温度和过程热压的变化而显着变化，并且受环境相对湿度的影响最小。对拟建热电联产的火用分析表明，在燃烧和蒸汽产生过程中，最大火用被破坏了，占整个热电联产循环中总火用破坏的87％以上。热电联产和非热电联产循环的比较表明，对于给定的萃取压力比，热电联产循环的第一律和第二律效率分别比非热电联产循环的效率高64％和40％。此外，示出了与用于进气冷却的反向布雷顿制冷循环相结合的燃气轮机循环比与其他常用进气空气冷却系统相结合的燃气轮机提供了更高的能量效率。结果提供了有关未来燃气轮机性能增强研究和开发重点的信息。

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