中亚管道输气站燃气发电机机房降温技术研究

Research on Cooling Technology of Gas Generator Room in Central Asia Pipeline Gas Transmission Station

中亚天然气管道是我国重要的能源战略通道,输气站全年采用燃气发电机供电方式。由于夏季发电机机房温度高,造成发电机动力不足甚至停机,导致压缩机组停机,会对中亚管道安全运行造成严重影响。根据发电机房热力学环境特点,计算了发电机机房降温所需的热负荷和冷却风量。应用流体力学软件FLUENT,针对发电机机房实施通风系统改进后的降温效果进行数值模拟。现场测试数据表明,发电机机房温度和发电机进气温度均控制在44℃以下,未发生发电机因吸气温度高导致停机。该措施经济效益显著,燃气发电机效率提高11%,每年节约燃气费59.64万元,增加管输费6.31万元。研究成果对于中亚特殊环境下输气站节能减排具有应用推广价值。

Central Asia natural gas pipeline is an important energy strategic channel in China.Gas generator is used for power supply in gas transmission station.Due to the high temperature of generator room in summer,the power of generator is insufficient or even shut down,leading to the shutdown of compressor unit,which has a serious impact on the safe operation of Central Asia pipeline.According to the characteristics of thermodynamic environment of the generator room,the heat load and cooling air volume required for the cooling of the generator room are calculated.Using the fluid dynamics software FLUENT,a numerical simulation is carried out for the cooling effect of the improved ventilation system in the generator room.The field test data show that when the temperature of the generator room and the air inlet temperature of the generator are both controlled below 44℃,no shutdown of the generator due to high air inlet temperature occurs.The economic benefit of this measure is remarkable,the efficiency of gas-fired generator will be increased by 11%,59.64×104 yuan of gas cost will be saved and 6.31×104 yuan of pipeline transportation cost will be increased every year.The research results have application and promotion value for energy conservation and emission reduction of gas transmission stations in the special environment of central Asia.