摘要作为一种清洁、高效的能源，液化天然气已经成为本世纪重点发展的能源。随着我国经济的快速发展，能源结构得到调整，LNG在各领域将被广泛使用。因此，大量引进LNG清洁能源是必然趋势。在我国，随着数座液化天然气固定接受终端的完工，液化天然气浮式接受终端也在加紧建造，这也就是业界普遍称为的FSRU（floating storage regasification unit）。因为LNG-FSRU中的核心设备是再气化模块，所以它是评价整个系统性能的关键因素。86939

    在海上使用的再气化装置，选择IFV系统最为合理。目前IFV系统有整体式IFV系统和分开式IFV系统，所以本文针对渤海地区具体的环境条件，对这两种IFV系统做热经济性分析，热经济性分析包括经济性分析（系统的购买费用及运行费用）、㶲效率计算、年度化成本计算（将非㶲成本按资产使用寿命每年均摊）、单位㶲成本计算（年度化成本和㶲成本进行统一）；最后根据单位㶲成本和㶲效率进行权衡从而选择最合适的IFV系统结构。对于本课题在渤海中的工况，经计算得到整体式IFV系统的㶲效率不但比分开式IFV系统的㶲效率高，而且单位㶲成本比分开式IFV系统的单位㶲成本要低，所以从这两种IFV系统中选择整体式IFV系统作为实施的方案最为合理。

毕业论文关键字：中间介质气化器；HYSYS；热经济性分析；㶲效率；单位㶲成本

Abstract   As a kind of clean and efficient energy, liquefied natural gas (LNG) has become a important kind of energy industry this century。 With the rapid development of our country's economy and the adjustment of energy structure, LNG will be widely used in various fields。 As a result, a large number of imported LNG clean energy is the inevitable trend。 In our country, as a number of LNG receiving terminals fixed completely, liquefied natural gas (LNG) floating receiving terminal stepped in to build, which is generally called FSRU (floating storage regasification unit)。 Because of LNG - FSRU is the key equipment in FSRU regasification module, so it is a key factor in evaluation of the whole system performance。

   It’s the most reasonable choice to use IFV system in the sea while choosing the regasification device。 There are  system and  system now, So in this paper, based on the bohai sea region specific environmental conditions，analyze the thermal efficiency of the two IFV systems ,thermal economy analysis including economical analysis (purchase cost and operation cost of the system), exergy efficiency calculation, the annual cost calculation (amortiz exergy cost according to the service life ), unit exergy cost ( unify annual operation cost and exergy cost ); at last,select the most appropriate IFV system structure according to the unit exergy cost and exergy efficiency 。 For this topic in the bohai sea condition, according to  and  ,the unit exergy cost of  is lower than that of separated IFV,and exergy efficiency of unitary IFV is higher than that of separated IFV ,so it is reasonable to choose unitary IFV as the IFV system from the two IFV systems。

Keywords:  IFV；HYSYS； thermal economy analysis； exergy efficiency；unit cost of  exergy 

目  录

第一章 绪论 1

1。1 课题研究的背景及意义 1

1。2 国内外发展现状及存在的问题 2

1。3研究目的与任务 3

1。3。1 研究目的 3

1。3。2 研究任务 3

第二章 利用HYSYS软件建立IFV模型 5