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首页> 外文期刊>Journal of natural gas science and engineering >Refrigeration cycles in low-temperature distillation processes for the purification of natural gas
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Refrigeration cycles in low-temperature distillation processes for the purification of natural gas

机译：低温蒸馏过程中的制冷循环以净化天然气

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The increasing energy demand has made low-quality natural gas reserves worthy of consideration for exploitation. As a consequence, industries have developed new process solutions in order to exploit these gas reservoirs in a profitable way. Most of these solutions are natural gas purification processes by distillation at low-temperature, involving or not solid CO2 formation. Due to the low-temperatures reached in this type of processes, the choice of the appropriate refrigeration cycle becomes of paramount importance for limiting their energy consumptions and, thus, their operating costs. The aim of this work is to compare the performances of different types of refrigeration cycles using the coefficient of performance (COP) as discriminating factor. Several compounds (such as nitrogen, light hydrocarbons and ethylene) and their mixtures have been considered as working fluids and both non-cascade and cascade systems have been taken into account. Simulations by means of Aspen Hysys (R) V7.3 have led to conclude that the propane-ethylene cascade refrigeration cycle allows to attain the best performances. (C) 2015 Elsevier B.V. All rights reserved.
机译：不断增长的能源需求使劣质天然气储量值得开发。因此，工业界已经开发出新的工艺解决方案，以有利可图的方式开发这些气藏。这些解决方案中的大多数是通过低温蒸馏进行的天然气纯化工艺，涉及或不形成固态CO2。由于在这种类型的过程中达到的低温，选择合适的制冷循环对于限制其能耗以及因此限制其运行成本至关重要。这项工作的目的是使用性能系数（COP）作为判别因子，比较不同类型制冷循环的性能。几种化合物（例如氮气，轻烃和乙烯）及其混合物已被视为工作流体，并且已考虑了非级联和级联系统。借助于Aspen Hysys（R）V7.3进行的模拟得出的结论是，丙烷-乙烯级联制冷循环可实现最佳性能。 （C）2015 Elsevier B.V.保留所有权利。

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