Optimal Design and Experimental Verification of Heat Transfer Capacity of Heat Exchanger of in Large Temperature Difference Air Handling Unit

Xu Yanni; Zhuo Mingsheng; Zhang longai; He Weiguang

doi:10.3969/j.issn.0253-4339.2021.06.065

您当前的位置：

首页 >

文章列表页 >

Optimal Design and Experimental Verification of Heat Transfer Capacity of Heat Exchanger of in Large Temperature Difference Air Handling Unit

更新时间：2024-07-18

- Optimal Design and Experimental Verification of Heat Transfer Capacity of Heat Exchanger of in Large Temperature Difference Air Handling Unit
- Journal of Refrigeration Vol. 42, Issue 6, (2021)
- 作者机构：
  
  1. 珠海格力电器股份有限公司
  2. 格力空调设备及系统运行节能国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2021.06.065
  CLC：
- Published：2021
- 稿件说明：
移动端阅览
Xu Yanni, Zhuo Mingsheng, Zhang longai, et al. Optimal Design and Experimental Verification of Heat Transfer Capacity of Heat Exchanger of in Large Temperature Difference Air Handling Unit[J]. Journal of refrigeration, 2021, 42(6).
DOI：

Xu Yanni, Zhuo Mingsheng, Zhang longai, et al. Optimal Design and Experimental Verification of Heat Transfer Capacity of Heat Exchanger of in Large Temperature Difference Air Handling Unit[J]. Journal of refrigeration, 2021, 42(6). DOI： 10.3969/j.issn.0253-4339.2021.06.065.

摘要

冷冻水系统大温差设计对空调系统节能具有重要意义。配套使用空气处理机组也需采用大温差设计，达到节能效果，本文在空气处理机组换热机理的理论基础上，分析了冷冻水大温差对空气处理设备换热性能的影响。通过优化表冷器管形、回路等方法，采用焓差法实验对比了大温差工况下不同管形、不同回路、不同翅片片距等对表冷器性能的影响，在相同换热截面下，大温差空气处理机组较常规机组能耗降低约20%，并在此基础上，提出了大温差表冷器优选结构方案，采用高效内齿形换热管，4排高效换热管可与6排光管表冷器达到相同冷风比，且整机能耗低约5%，为大温差设计的应用和实践提供借鉴和参考。

Abstract

A chilled water system with large temperature difference is essential for the economical operation of air conditioning. This design also enables air handling units (AHU) to achieve an energy-saving effect. Based on the mechanism of the heat exchange in AHU

this study analyzes how chilled water with large temperature difference affects the heat transfer of AHU. Experiments are conducted to test the influence of large temperature difference of chilled water in the cooling coils with differential enthalpy method. The pipe shapes and flow routes are optimized. The performances of the cooling coils are compared for different coil pipe shapes

flow routes

and fin spacings. Using the same heat exchange section

the AHU of this design reduces the energy consumption by approximately 20% compared with a conventional unit. Furthermore

a preferable scheme is proposed to reduce energy consumption by 25%

in which cooling coils are composed of four-row high-efficiency inner threaded pipes that have the same ratio (cooling capacity to airflow) as those of six-row non-threaded pipes. The results provide applicable and practical cases for the design of AHU with large temperature difference.

关键词

Keywords

references

Views

1722

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Cooling System for Data Centers Based on the Air-Water-Air Principle with Increased Temperature Differential

Experimental Research on Design and Operation Characteristics of Large Temperature Difference Centrifugal Chiller

Related Author

Jing Yang

Xie Xiaoyun

Jiang Yi

Zhou Yu

Zhuo Mingsheng

Zhang Longai

Related Institution

Building Energy Research Center, Tsinghua University

State Key Laboratory of Air-conditioning Equipment and System Energy Conservation

Address：10/F, Yindu Mansion, 67 Fucheng Road, Haidian Dist, Beijing, China Postal code：100142
Tel：010-68711412 Email：editor@car.org.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰