Abstract
The aim of the work is to study the energy efficiency of the «Arctic Cascade» technology used in the Russian project «Yamal-LNG». The company uses the reserves of the Yuzhno-Tambeyskoye field as a resource base. The relevance of the study is due to the imperfection of technological schemes in terms of the energy efficiency of liquefaction processes, as well as the lack of experience in operating LNG projects in Arctic conditions. This work presents the calculation of energy costs in the production of liquefied natural gas using the «Arctic cascade» technology using the example of the operating conditions of the Yamal-LNG plant, based on the model built in the Aspen Hysys. Modeling the technological scheme made it possible to apply the obtained data for the calculation, as a result of which the specific energy consumption of 230,78 kWh/t per ton of product was determined. It turned out that the technological solution has a significant drawback: a fairly high boil-off gas yield of 15.72% was revealed. This fact reduces the efficiency of the plant and leads to the need to re-feed it into the liquefaction cycle.
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