论文总字数：18823字

摘 要

太阳能资源符合当今世界化石能源匮乏的情形下可持续发展战略的需求。但其间歇性决定了必须要有合适的传蓄热介质，以保证在太阳辐照强度不足时，仍然能使太阳能的发电过程持续稳定地运行。熔融盐因具有良好的高温稳定性和导电性等优势，成为未来太阳能热发电工程中理想的传蓄热介质，因为其继承了传统二元碳酸盐热稳定性好，不易产生污染等优势的基础上，克服了传统碳酸盐熔点高，粘度大等弊端，所以有望在未来得到推广和应用。但由于熔融盐的使用条件通常是在高温下，由金属制造而成的高温罐、低温罐、熔盐泵以及熔盐输送管道等设备和管道，长期在腐蚀性熔盐的高温环境下使用，面临被腐蚀的严重问题，因此，对金属材料在熔融盐中的腐蚀行为进行研究是十分重要和必要的。

关键词：太阳能；熔盐；发电；腐蚀；分析

Molten salt corrosion during tower solar thermal power generation

Abstract

Solar energy as a clean green renewable energy,can meet the needs of human sustainable development. But it intermittently determines the need for a suitable transfer heat medium to ensure that the solar radiation intensity is still insufficient to make the solar power generation process continues to run steadily. The melting salt has two advantages: good high temperature stability and conductivity. It is the ideal heat transfer medium in the future solar thermal power generation project. Because it inherits the advantages of traditional binary carbonate thermal stability and is not easy to produce pollution. To overcome the traditional high melting point of carbonate, viscosity and other defects, it is expected in the future to be promoted and applied. However, the use of molten salt conditions is usually under the condition of high temperature, high temperature tank, low temperature tank, molten salt pump and molten salt pipeline and other equipment and pipelines, which are made by alloy, are long-term use in corrosive molten salt with high temperature environment. Due to the serious problem of corrosion, it is necessary and important to study the corrosion behavior of metal materials in high temperature molten salt.

Keywords: solar energy; molten salt; power generation; corrosion;ana

目录

摘要............................................................................................Ⅰ

Abstract ....................................................................................Ⅱ

第一章 绪论................................................................................1

1.1前言..............................................................................................1

1.2太阳能热发电的过程..................................................................1

1.2.1塔式太阳能热力发电系统发展历史.................................1

1.3塔式太阳能热力发电系统主要组件简介..................................3

1.3.1定日镜................................................................................3

1.3.2中央接收器........................................................................4

1.4塔式太阳能热发电系统的经济效益分析...................................5

1.5太阳能热发电传热蓄热现状.......................................................5

1.6论文主要研究内容......................................................................7

1. 塔式太阳能热发电过程中的熔盐腐蚀.......................9

2.1概述.............................................................................................9

2.2热发电过程中的熔盐分类和特点.............................................9

2.2.1熔盐腐蚀的分类................................................................9

2.2.2三元混合碳酸盐作为新型传热蓄热熔盐的优势............10

2.2.3对于熔盐腐蚀的分析与研究............................................10

2.3材料的选择...................................................................................11

2.4小结...............................................................................................12

1. 试验材料和试验方法..................................................13

3.1概述..............................................................................................13

3.2试样材料............................................................................,..........13

3.2.1试验过程和步骤..................................................................13

第四章 不锈钢在熔盐环境下的腐蚀研究..............................17

4.1前言..............................................................................................17

4.2 试验结果与分析.........................................................................17

4.3小结...............................................................................................23

第五章 总结与展望以及经济性分析......................................24

5.1总结..............................................................................................24

5.2展望...............................................................................................24

5.3经济性分析...................................................................................24

参考文献....................................................................................25

致谢............................................................................................27

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