摘要能源作为人类活动的物质基础,也是经济发展的最基本驱动力。燃油价格居高不下,能源供应越发紧张,在此严峻形势下,节能减排,实现余热的回收利用已经成为一种必然趋势。而船舶废气的余热回收利用就是很重要的一方面。86635
本文结合船舶内燃机废气余热回收的特点和超临界二氧化碳布雷顿循环技术,参照某船废气余热回收系统,通过计算,对该余热回收系统作出理论研究,针对现有换热器体积大、耐腐蚀性差、换热效率低等不足之处,提出采用高性能的板式换热器设计方案并对换热器进行设计,设计了板式换热器的流程组合、板片材料、板片连接处采用全焊接的密封形式等内容。本文设计的板式换热器相比于传统的壳管式换热器来说具有换热效率高、体积小、结构简单等优点,因而适用于布雷顿循环,具有广阔的应用前景和现实意义。
毕业论文关键词:余热回收,超临界CO2,布雷顿循环,换热器
Abstract Energy is the material basis of human activity, it is the basic driving force of economic development。Fuel prices are high, the energy supply is increasingly tense, in this grim situation, the global countries are seeking ways and measures to ensure energy supply。The ship exhaust heat recovery is a very important aspect
In this paper, the ship internal combustion engine exhaust heat recovery characteristics and supercritical carbon dioxide Brayton cycle technology, with reference to a ship exhaust heat recovery system,and by calculating the waste heat recovery system to theoretical research, while the system of key components such as heat exchanger design, preliminary design of a simplified scheme of the system。For large volume of existing heat exchangers, poor corrosion resistance, heat and low efficiency shortcomings, leading to use high-performance plate heat exchanger design。In this paper, a system diagram Ship heat recovery system compared to traditional high efficiency, small size, simple structure, which has broad application prospects and practical significance
Keywords: Waste heat recovery, supercritical CO2, brayton cycle, heat exchangers
目 录
第一章 绪论 1
1。1 课题的背景、目的、意义 1
1。2 国内外余热回收利用技术的发展状况 1
1。2。1 国外余热回收利用情况 1
1。2。2 国内余热回收利用情况 3
1。3主要研究内容 3
1。4本章小结 4
第二章 船用布雷顿循环系统研究 5
2。1 船用布雷顿循环系统原理 5
2。2超临界二氧化碳的性质 6
2。3 换热器的主要类型 6
2。4本章小结 11
第三章 板式换热器简介 12
3。1板式换热器发展概述 12
3。2板式换热器的基本构造 12
3。3流程组合 13
3。4板式换热器的性能特点 13
3。5全焊式板式换热器的性能分析 15
3。6本章小结