Conceptual analysis of the precooling stage for LNG processes

被引：44

作者：

Castillo, L. ^{[1
]}

Dahouk, M. Majzoub ^{[2
]}

Di Scipio, S. ^{[2
]}

Dorao, C. A. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Energy & Proc Engn, N-7491 Trondheim, Norway

[2] Univ Simon Bolivar, Dept Thermodynam & Transfer Phenomena, Caracas, Venezuela

来源：

ENERGY CONVERSION AND MANAGEMENT | 2013年 / 66卷

关键词：

LNG technology; Precooling stage; Refrigeration system;

D O I：

10.1016/j.enconman.2012.09.021

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

More than 95% of the installed LNG facilities by 2012 use a precooling cycle as the first stage of the process. In this work, a technical comparison between different precooling cycles for LNG processes is carried out through computational simulations using Aspen HYSYS (R). The aim is to provide future developments with a clear idea of the technical advantages/disadvantages involved in the selection of the process for the precooling cycle. A three stage propane precooled cycle was found to be the most energetically efficient among the studied cases, even better than a two stage mixed refrigerant process (C-2/C-3) for both climate conditions, warm (25 degrees C) and cold (6 degrees C). However, due to the reduced power share that may be reached with a propane cycle temperature restriction, the mixed refrigerant precooling cycle is the preferred alternative under the cold climate condition. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：41 / 47

页数：7