| 摘要: |
| 目的 解决压差发电装置发电功率低的问题，优化工艺参数。方法 ①通过常规?及高级?分析法发现透平膨胀机可避免外源?损占比达42%，表明装置自身的运行参数设置不合理，导致了高?损。②采用响应面法分析和优化运行参数，以进出口压力比、进口温度、天然气体积流量作为因素变量，以发电功率、总?损作为响应值，设计13组试验。结果 进出口压力比和天然气体积流量间的交互作用对发电功率的影响最显著，进出口压力比和天然气体积流量的交互作用、进口温度和天然气体积流量的交互作用对总?损的影响显著。据此，提出通过提高进出口压力比、天然气体积流量和降低进口温度的方式来进行参数优化的策略。根据优化后的工艺参数调整现场参数：进出口压力比为1.38、进口温度为30.7 ℃、天然气体积流量为11×104 m3/h，此时，发电功率达到625.3 kW，总?损降低了180.9 kW，其中，透平膨胀机?效率增至72.3%，可避免的外源?损减少了104.4 kW。此外，装置的年经济效益增加了114.5万元，CO2的年排放量减少了1109.5 t。结论 针对各类复杂的天然气处理工艺，可使用高级?分析与响应面分析的组合优化法。首先，利用高级?分析量化工艺改进的潜力；若可避免外源?损占比较大，则再采用响应面法进一步进行参数优化。 |
| 关键词: 天然气 压差发电 高级㶲分析 交互作用 响应面法 |
| DOI：10.3969/j.issn.1007-3426.2025.02.009 |
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| 基金项目: |
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| Parameters optimization of natural gas differential pressure power generation based on response surface method |
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Penggang ZHANG, Donglei YANG, Xi CHENG, Xinglong LUO, Wei LI, Youjiang LI
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PetroChina Tarim Oilfield Company, Korla, Xinjiang, China
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| Abstract: |
| Objective The aim is to solve the low-power problem of differential pressure generators and optimize the process parameters. Method Firstly, exergy loss of a turbine expander could reduce 42% of external exergy loss through conventional exergy analysis and advanced exergy analysis, which indicates that improper operating parameters had led to high exergy loss. Secondly, the response surface method was used to analyze and optimize operation parameters. 13 groups of test data were designed with inlet and outlet pressure ratio, inlet temperature and natural gas volume flow rate as factor variables, and generation power and total exergy loss as response values. Result Exergy loss was most significantly affected by the interaction between inlet and outlet pressure ratio and natural gas volume flow rate, and the total exergy loss was significantly effected by the interaction between the inlet and outlet pressure ratio and the natural gas vloume flow rate. Based on this, a stratege of parameters optimization was proposed by increasing the inlet and outlet pressure ratio and the natural gas volume flow rate, and reducing the inlet temperature. Adjust the field parameters according to the optimized process parameters: when the inlet and outlet pressure ratio was 1.38, the inlet temperature was 30.7 ℃, the volume flow rate of natural gas was 110×103 m3/h, the generation power reached 625.3 kW and overall exergy loss decreased by 180.9 kW. The avoidable external exergy loss decreased by 104.4 kW when the turbine exergy efficiency increased to 72.3%. The economic benefit of the device is increased by 1.145 million yuan per year, and the CO2 emissions were reduced by 1 109.5 t/a. Conclusion Advanced exergy analysis and response surface analysis can be popularized for all types of complex natural gas processing processes. Advanced exergy analysis can first quantify exergy improvement potential. If the avoidable external exergy loss ratio is high, response surface method can be applied for further parameters optimization. |
| Key words: natural gas differential pressure power generation advanced exergy analysis interaction response response surface method |
