摘 要

能源危机是全世界都很关注的问题，所以对新能源设备的研究和能源设备的优化更引起人们的关注，也就越来越需要我们设计出更加高效节能的换热器。翅片管换热器在动力、化工、制冷等工业中有广泛的应用，随着工业发展，工业缺水及环境污染等问题日益突出，对空冷器设备的优化设计得到关注，对换热器结构紧凑、高效节能节材的发展提出进一步要求。当前国内外针对换热器核心部件的制造方法和应用都进行了大量的研究工作，但对换热器整体性能的提升还是缺乏较为系统的设计，因此翅片管换热器的热结构设计及其制造进行更加深入地研究。

本文基于传热学原理，流体力学，结合传热特性，设备选型标准等，在已知条件下设计一台水—空气冷却器，包括传热计算，结构计算，设备选型和软件校核等内容。本文设计的水—空气冷却器，水的体积流量V₁为120m³/h，进口温度T₁^'=50℃，出口温度T₁^''=48.1℃，空气进口温度T₂^'=20℃，出口温度T₂^''=35.4℃，传热量Q=940252KJ/h，总管根数106根，,四管排，一管程，有效迎风面积为3.63m²，管束长度为3m，宽度为1.5m，管子外径为25mm，内径为20mm，翅片外径为50mm，风机规格为G-TF18-R4-V_S7.5 。

环境保护和能源使用的成本越来越高，促使着全世界寻找更加有效更加高效的能源生产方法，研发更加高效的换热元件，寻找更加适用的传热工质，设计更加节能的换热装置结构。

关键词：翅片管 空冷器 EDR 翅片管换热器

Design of 120m³/h Water - Air Cooled Heat Exchanger

ABSTRACT

Energy crisis is a very concern problem all over the world,so the research of new energy equipment and energy equipment optimization catch more attention of people,and we need to design more efficient,more energy-saving heat exchanger.Finned tube heat exchanger is widely used in power,chemical and refrigeration industries.With industrial development, industrial water shortage and pollution of environment problem is increasingly prominent, the optimization design of air cooler equipment is focused on, the development of compact heat exchanger structure, high efficiency and energy-saving, material-saving request further.The current manufacturing method and application of the core parts for heat exchanger at home and abroad have carried out extensive research work, but the overall performance of heat exchanger is still lack a systematic design, so the thermal structure of finned tube heat exchanger design and manufacturing need more in-depth research.

Based on the principle of heat transfer, fluid mechanics, combined with the heat transfer characteristics, equipment type selection standard, etc.under the condition of known design a water - air cooler, including heat transfer calculation, structure calculation, equipment selection and software checking, etc. The water - air cooler designed in this paper,the volume of water flow V₁ is 120 m³ / h, inlet temperature T₁ ^'= 50 ℃, the outlet temperature T₁^{' '}= 48.1 ℃, the air inlet temperature T₂ = 20 ℃, the outlet temperature T₂^' = 35.4 ℃, the capacity of heat transmission Q = 940252 kJ/h, total pipe root number is 106, four tube row, a monitor, effective windward area of 3.63 m², bundle length is 3 m, width 1.5 m, the pipe diameter is 25 mm, inner diameter is 20 mm, fin diameter is 50 mm, fan specifications for G-TF18-R4-VS7.5.

The cost of environmental protection and energy use is higher and higher,lead the world with more efficient methods of energy production, research and development of more efficient heat transfer elements, looking for more suitable heat transfer working medium, more energy saving heat exchange device structure design.

Key words: finned tube; air cooler;EDR ;finned tube heat exchanger

目 录

摘要 I

ABSTRACT II

第一章 绪论 1

1.1 课题研究背景 1

1.2 翅片管换热器的原理 1

1.3 影响翅片管换热器换热效率的因素 2

1.4总体设计应考虑的事项 3

1.5国内外发展现状 3

1.6 研究意义 3

第二章120m³/h水-空气冷却器的设计 5

2.1已知条件 5

2.2 空冷器的方案计算 5

2.3 翅片管束的选择 7

2.4 管内膜传热系数的计算 10

2.5 翅片膜传热系数的计算 10

2.6 管壁温度的计算和管内膜传热系数的校正 11

2.7管内阻力计算 12

2.8管外空气阻力 13

2.9风机功率的计算 14

2.10 风机噪音的估算 14

2.11 管箱设计 15

2.12 基于EDR的模拟结果及校准 17

第三章 结果与展望 20

3.1设计结果 20

3.2未来展望 20

参考文献 21

致谢 23