摘要随着航海事业的飞速发展，远洋船舶运输变得越来越普遍，但是因为船舶使用的 大多数为柴油燃机，一般用的燃油含硫量很高。但是这种高硫燃油燃烧会产生硫氧化 物，对我的地球环境有很多不利影响。为了保护地球环境，欧盟和美国等发达国家开 始制定港口燃油的使用规则，出现了很多的硫排放控制区。当船舶在硫排放区航行时 就被要求使用低硫燃料。但是低硫燃油在常温下的粘度并不高，无法满足船舶柴油机 正常燃用的要求，容易使得柴油机无法正常工作。只有降低低硫油温度才能增加其粘 度，达到柴油机的工作要求，所以本文设计开发了船舶低硫燃油的冷却系统。一般要 求冷却系统能够比较精确的控制低硫燃油温度，燃油温度上下波动在 1℃之内，使燃 油粘度达到 2 厘斯以上，满足船舶柴油的正常工作的需要。84880
毕业论文关键词：低硫燃油，粘度，冷却系统
Abstract With the rapid development of maritime industry, ocean shipping has become more and more common。 While most ships use diesel turbos that consume a kind of high-sulfur fuel, the burning of this kind of fuel can produce sulfur oxides and therefore bring a lot of detrimental effects to our earth’s environment。 In order to protect the earth’s environment, developed countries like EU and US are beginning to set up rules for the use of fuel in ports and specify many sulfur emission control areas (SECA) where ships are required to use low-sulfur fuel。 However, the low viscosity of the low-sulfur fuel at ambient temperature, not meeting the normal burning requirement of diesel engines, can easily lead to their abnormal working。 The normal working of diesel engines requires a higher viscosity, which can only be achieved by lowering the temperature of low-sulfur fuel。 As a consequent, this paper has designed and developed a cooling system, which, according to general demands, is able to precisely control the temperature of low-sulfur
fuel with a fluctuation of 1℃ or less。 In this way, the resulting viscosity of more than 2
centistoke can make diesel engines of ocean ships work normally。
Keywords:low-sulfur fuel, viscosity，cooling system
目 录
第一章 绪论 1
1。1 研究低硫油冷却系统的背景及意义 1
1。3 本文主要研究内容 2
第二章 低硫油冷却系统的流程设计 3
2。1 沥青船设计参数 3
2。2 低硫油冷却系统的基本系统结构 3
2。3 冷却系统中的冷水机组 4
2。3。1 压缩机 5
2。3。2 冷凝器 8
2。3。3 节流机构 9
2。3。4 蒸发器 13
2。3。5 制冷剂 4900吨沥青船低硫油冷却系统设计:http://www.youerw.com/jixie/lunwen_101089.html