冷库课程设计说明书 正文

目录

0 .前言 -------------------------------------------------------------------------------------------------------------- 1

1．设计题目及相关资料 ----------------------------------------------------------------------------------------- 1

1.1设计题目 -------------------------------------------------------------------------------------------------------- 1

1.2原始资料 -------------------------------------------------------------------------------------------------------- 1

1.3室外参数--------------------------------------------------------------------------------------------------------- 1

1.4室内参数--------------------------------------------------------------------------------------------------------- 2

1.5根据实用途附加参数 ----------------------------------------------------------------------------------------- 2

1.6冷库实际的冷加工及贮藏能力----------------------------------------------------------------------------- 2

2 . 冷负荷计算 ----------------------------------------------------------------------------------------------------- 4

2.1冷负荷计算概述 ----------------------------------------------------------------------------------------------- 4

2.2冷库外墙、地坪、顶层保温层结构----------------------------------------------------------------------- 4

2.3围护结构传热量Q1计算 ------------------------------------------------------------------------------------ 5

2.4货物热流量Q2计算------------------------------------------------------------------------------------------- 7

2.5通风换气热量Q3----------------------------------------------------------------------------------------------- 9

2.6电动机运转热量计算Q4 ----------------------------------------------------------------------------------- 10

2.7操作热量Q5--------------------------------------------------------------------------------------------------- 10

2.8库房冷却设备负荷： --------------------------------------------------------------------------------------- 12

2.9库房机械冷负荷Q J计算 ----------------------------------------------------------------------------------- 12

2.10负荷汇总： -------------------------------------------------------------------------------------------------- 13

3 . 制冷设备的选型计算 ---------------------------------------------------------------------------------------- 13

3.1压缩冷凝机组的选型计算---------------------------------------------------------------------------------- 14 3.2冷凝器的选型计算------------------------------------------------------------------------------------------- 19 3.3冷风机的选型计算 ------------------------------------------------------------------------------------------- 20

4 . 系统管道的设计--------------------------------------------------------------------------------------------- 23

4.1R22的管内允许流速和压力降 ---------------------------------------------------------------------------- 23

4.2管径的确定---------------------------------------------------------------------------------------------------- 24

4.3管的选型------------------------------------------------------------------------------------------------------- 25

5.自动化控制------------------------------------------------------------------------------------------------------ 26

5.1库温自控------------------------------------------------------------------------------------------------------- 26

5.2冲霜控制------------------------------------------------------------------------------------------------------- 27

5.3库房的湿度控制 --------------------------------------------------------------------------------------------- 28

5.4冷风机的自动化控制 --------------------------------------------------------------------------------------- 28

6 .设计心得 ------------------------------------------------------------------------------------------------------- 28

7 .参考文献 ------------------------------------------------------------------------------------------------------- 29