Characteristics of refrigerant hold-up and heat transfer performance of falling film condenser under refrigerating condition

ZHANG Fayong; LIU Jinping; XU Xiongwen

doi:10.11949/j.issn.0438-1157.20150405

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Characteristics of refrigerant hold-up and heat transfer performance of falling film condenser under refrigerating condition

更新时间：2025-12-10

- Characteristics of refrigerant hold-up and heat transfer performance of falling film condenser under refrigerating condition
- CIESC Journal Issue 12, Pages: 5012-5021(2015)
- 作者机构：
  
  1. 华南理工大学电力学院,广东,广州,510640
  2. 华南理工大学亚热带建筑科学国家重点实验室,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150405
  CLC： K172.4
- Online First：05 December 2015，
  
  Published：05 December 2015
- 稿件说明：
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ZHANG Fayong, LIU Jinping, XU Xiongwen. Characteristics of refrigerant hold-up and heat transfer performance of falling film condenser under refrigerating condition[J]. CIESC Journal, 2015, (12): 5012-5021.
DOI：

ZHANG Fayong, LIU Jinping, XU Xiongwen. Characteristics of refrigerant hold-up and heat transfer performance of falling film condenser under refrigerating condition[J]. CIESC Journal, 2015, (12): 5012-5021. DOI： 10.11949/j.issn.0438-1157.20150405.

摘要

为探索在保证空调器性能的同时

减少制冷剂充注量的解决方案

对家用分体空调室外机的制冷剂积存量进行了实验研究

结果表明:冷凝器中两相段及过冷段的液相积存量较大

导致冷凝器内积存的制冷剂质量较多

占总充灌量的60%以上。故利用竖直管降膜冷凝来减少制冷剂积存量的思路

设计了翅片管降膜冷凝器并对其进行了实验研究

结果表明:在保证系统性能的同时

总充灌量由1050 g减少到550 g。

Abstract

In order to reduce the refrigerant charging quantity while maintaining the performance of an air conditioner

the refrigerant hold-up in the condenser of a domestic air conditioner is experimentally studied. The results indicate that more than 60% of the total refrigerant charging quantity is in the condenser

since the liquid-phase hold-up in the two-phase and subcooled regions is relatively large. Therefore

a finned tube falling film condenser is proposed and employed since vertical tubes can decrease the refrigerant hold-up. Consequently

the total refrigerant charging quantity is reduced from 1050 g to 550 g while the system performance maintains stable.

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