摘要在能源危机日益严重的今天，如何提高能源利用率成为能源行业的主攻方向。翅片管作为利用增大换热面积提高传热系数的最具代表性的产品，已经成为各工业领域产品中不可或缺的组成部分。本次设计以太阳能热发电行业中新兴的熔盐热载体为工质，设计成型一套适合在太阳能热发电中运用的翅片管换热器。根据设计要求热负荷10kW，选定合适的翅片管型式，对其进行传热计算与结构设计。利用AutoCAD对设计的翅片管换热器机械制图，最后在完成制图的基础上，运用ANSYS对翅片管进行温度场，热应力和热膨胀量分析，完成其在高温工况下的性能评估。这次的翅片管熔盐换热器设计为实验室组建太阳能热发电设备提供了可行性依据。65193

毕业论文关键词  翅片管   熔盐   对流换热系数   翅片效率

毕业设计说明书（论文）外文摘要

Title    Molten Salt Fin Tube Heat Exchanger Designing     

Abstract

In today's increasingly severe energy crisis, how to improve the energy efficiency has become the main attack direction in the energy industry. To improve the heat transfer coefficient, fin tube is the most representative products ,it has become an integral part of the products in the most industries. In this article,a fin tube exchanger that uses molten salt as working medium is designed. In solar thermal systems, molten salt is used as a new medium.According to the design requirements,heat load is 10kW. First,select appropriate fin tube type, then go on to calculate the heat transfer process and design its structure. Using AutoCAD to design the fin tube heat exchanger in mechanical drawing, after completing its  drawing, analyse fin tube temperature field, thermal stress and thermal expansion quantity to complete its performance evaluation under high temperature conditions by using ANSYS. The molten salt fin tube heat exchanger design provided a feasibility basis for building a solar thermal power generation equipment in the lab.

Keywords: fin tube, molten salt, coefficient of convective heat transfer, fin efficiency

目  录

1  绪论 1

1.1  翅片管换热器课题背景 1

1.1.1  翅片管换热器介绍 1

1.1.2  我国国内翅片管式换热器的发展状况 2

1.1.3  国外翅片管式换热器的发展状况 3

1.2  熔盐热载体应用背景 4

1.3  研究的目的和意义 5

1.4  论文的主要工作 5

2  翅片管熔盐换热器热力计算 6

2.1  原始数据 6

2.1.1  设计参数 6

2.1.2  翅片管参数的选定 6

2.2  流体的物性参数 7

2.3  平均温差的计算 8

2.4  计算总传热系数 8

2.4.1  翅片壁面总效率计算 8

2.4.2  管内熔盐侧对流换热系数计算 10

2.4.3  管外空气侧对流换热系数计算 11

2.5  翅片管总传热面积计算 11

2.6  翅片管翅片侧空气压降计算