Techno-economic Analysis on Long-distance Pipeline Transportation of Liquid Ammonia
As a carbon-free and green energy carrier,ammonia can effectively replace fossil fuels to achieve energy conservation and emission reduction.Liquid ammonia pipeline is currently one of the most efficient and safe long-distance transportation methods for ammonia,and its economic evaluation is an important basis for improving the economic benefits of pipeline transportation and optimizing pipeline parameters.Based on domestic and foreign liquid ammonia pipeline transportation projects,the paper establishes the transportation technology model and economic evaluation model of long-distance liquid ammonia pipeline system and conducts the comparative analysis of the unit transportation cost and annual transportation cost composition of liquid ammonia pipelines under the influence of different pipeline diameters,flow rates,inlet temperatures,and transport distance.The results show that the unit transportation cost drops quickly at the beginning and then gradually flats with the increase of pipe diameter when the flow rate is constant.While the annual transportation cost changes in the opposite direction and the pipeline construction,annual operation,and maintenance costs plays a dominant role.When the flow is constant,both the unit transportation cost and annual transportation cost increase linearly with the increase of pipe diameter.As the flow rate increases,the unit transportation cost significantly decreases and the annual transportation cost increases linearly with a significant increase in the pump construction and operation maintenance costs.As the inlet temperature increases,the unit transportation cost and annual transportation cost gradually increase and the increase is relatively small.As the transport distance increases,the unit transportation cost continues to decrease and the trend is gradually flat.The economic benefits of pipeline transportation are higher under large diameter and large flow rate of the long-distance pipeline transportation of liquid ammonia.
万方数据
维普
