Thermodynamic Performance of Transcritical CO<sub>2</sub> Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling

Li Wenlong; He Yang; Deng Jianqiang

doi:10.3969/j.issn.0253-4339.2024.04.104

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Thermodynamic Performance of Transcritical CO₂ Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling

更新时间：2024-09-02

- Thermodynamic Performance of Transcritical CO₂ Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling
- Journal of Refrigeration Vol. 45, Issue 4, Pages: 104-113(2024)
- 作者机构：
  
  西安交通大学化学工程与技术学院　西安　 710049
- 作者简介：
  
  Deng Jianqiang, male, professor, School of Chemical Engineering and Technology, Xi′an Jiaotong University, 86-29-82668566, E-mail: dengjq@mail.xjtu.edu.cn. Research fields: refrigera-tion and heat pump technology, process fluid machinery.
- 基金信息：
  
  the National Key R&D Program "Science and Technology Winter Olympics" Key Project(2021YFF0306802)
- DOI：10.3969/j.issn.0253-4339.2024.04.104
  CLC： TB61⁺5;TB657
- Received：29 April 2023，
  
  Revised：2023-07-04，
  
  Accepted：15 August 2023，
  
  Published：16 August 2024
- 稿件说明：
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Li Wenlong, He Yang, Deng Jianqiang. Thermodynamic Performance of Transcritical CO₂ Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling[J]. Journal of Refrigeration, 2024, 45(4): 104-113.
DOI：

Li Wenlong, He Yang, Deng Jianqiang. Thermodynamic Performance of Transcritical CO₂ Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling[J]. Journal of Refrigeration, 2024, 45(4): 104-113. DOI： 10.3969/j.issn.0253-4339.2024.04.104.

摘要

为降低CO

制冰系统能耗，提高系统性能，提出了双级压缩中间完全冷却引射膨胀直冷制冰系统（TCEIS）。通过构建热力学模型，分析了关键参数对系统性能的影响，在此基础上对TCEIS应用于不同季节和城市的COP

R+HR

、年耗电量和热回收量及年运行费用和热回收收益进行了研究，并与双级压缩直冷制冰系统（TCS）、双级压缩中间完全冷却直冷制冰系统（TCIS）和单级压缩引射膨胀直

冷制冰系统（ES）进行对比。结果表明：在考虑热回收的情况下，TCEIS具有最高的COP

R+HR

，且在越炎热的季节和城市优势越明显。TCEIS在广州运行时，在分别满足冬季（410.989 kW）、过渡季（542.092 kW）和夏季（701.353 kW）制冷负荷的需求下，年运行成本相较于TCIS、TCS和ES可分别减少10.76万元、39.79万元和58.31万元。可为CO

直冷制冰系统的构建和应用提供理论参考。

Abstract

To reduce the energy consumption of a CO

ice-making system and improve system performance

this study proposes a transcritical CO

two-stage compression ejector expansion direct cooling ice-making system with complete intercooling (TCEIS). The effects of key parameters on system performance were analyzed by developing a thermodynamic model. Using this model

the COP

R+HR

annual power consumption

heat recovery capacity

annual operating cost

and heat recovery income of the system applied in different seasons and cities were evaluated and compared with those of a two-stage compression direct cooling ice-making system (TCS)

a two-stage compression direct cooling ice-making system with complete intercooling (TCIS)

and an ejector expansion direct cooling ice-making system (ES). The results show that TCEIS has the highest COP

R+HR

considering heat recovery

with the advantages being noticeable in hot seasons and cities. When operating in Guangzhou with cooling loads of 410.989 kW in winter

542.092 kW in transition seasons

and 701.353 kW in summer

the annual operation cost of TCEIS can be reduced by 107.6 thousand yuan

397.9 thousand yuan

and 583.1 thousand yuan compared with those of TCIS

TCS

and ES

respectively. This study provides a theoretical reference for the construction and application of CO

direct-cooling ice-making systems.

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Thermodynamic Performance of Transcritical CO2 Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling

DOI：10.3969/j.issn.0253-4339.2024.04.104

摘要

Abstract

关键词

Keywords

references

Thermodynamic Performance of Transcritical CO₂ Two-stage Compression Direct Cooling Ice Making System with Complete Inter-cooling