English to Chinese: New 16MW GE turbine for pipeline compressors
General field: Tech/Engineering
Detailed field: Construction / Civil Engineering | |
Source text - English
New 16MW GE turbine for pipeline compressors
GE has released the 16.5 MW NovaLT16, designed to provide 37% mechanical efficiency for pipeline compression and 36% efficiency for simple-cycle power generation. Further specs, according to GE, include 80% efficiency for combined heat and power, 99% availability and a guarantee of 25 ppm NOx. “Having a family of drivers below 20 MW opens up a more than $5 billion market, which adds 40% to 50% to the size of our potential business,” said Rafael Santana, President and CEO, Turbomachinery Solutions, GE Oil and Gas.
The NovaLT16, a two-shaft gas turbine with a power turbine speed of 7,800 rpm, is particularly suited to pipeline compression — with direct coupling to the latest generation of pipeline compressors. To further enhance its suitability for often-remote pipeline locations, it can attain 35,000 hours of mean time between maintenance (MTBM).
The axial compressor has evolved from the GE MS5002E design with one stage added (taking it from 11 to 12) for improved efficiency and increasing the pressure ratio from 17:1 up to 19:1. Three variable geometry stages (IGV, S1 and S2) on the axial compressor provide for a wider speed range and surge control capabilities.
A rugged single annular combustor and 360° combustion casing for tighter clearance control were developed from the GE5 unit, which has a compact design. Also from the GE5, the NovalLT16 has 39 pre-mixers with double counter-rotating swirlers to improve air-fuel mixing. The turbine section’s 1st and 2nd High Pressure (HP) buckets are made of single crystal N4 material to improve durability while eliminating the need for thermal barrier coatings. The Low Pressure (LP) turbine has a variable-geometry nozzle for higher efficiency and improved emissions at part load (another feature that works well in pipeline applications with direct coupling).
| Translation - Chinese
通用管道压缩机用新型16MW汽轮机
通用公司推出了16.5 MW NovaLT16汽轮机，其管道压缩机械效率可达37%，简单循环发电效率可达36%。根据通用公司的说明，热电混用的效率高达80%，可用率达99%，可保证25ppm的氮氧化物（Nox）。通用公司油气汽轮机械解决方案董事长兼总裁Rafael Santana先生表示：“功率低于20MW的驱动系列产品有着高达50亿美元的市场，可给公司增加40%-50%的业务。”
NovaLT16是一种两轴燃气轮机，其转速可达7800转/分，非常适合管道压缩，该汽轮机可与最新一代的管道压缩机直接连接。为了更好的适用于偏远地区管道，该汽轮机可实现35000小时的平均维护间隔时间。
轴流式压缩机根据GE MS5002E设计改进而来，增加了一级（按照11-12级考虑），可提高效率，而且可让压力比从17:1增加到19:1。轴流式压缩机上三个可变几何级（IGV, S1和S2）可提供更宽的转速范围及脉动喘振控制能力。
根据GE5机组研制出的单体环形燃烧器和360°严格间隙控制的燃烧室使得设计更加紧凑。此外，根据GE5，NovalLT16上有39个配反转旋流器的预混合器，这样可提高空气-燃料混合效率。采用单晶N4材料生产的汽轮机部分第一和第二高压缸在提高耐久性的同时可免去热保温层的需要。低压汽轮机上的尺寸可变喷嘴可提高效率，并提高部分载荷下的排放量（与管道应用配合很好的另一个特征就是与管道直接连接）。 |
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