Research on performance of NH₃/CO₂ cascade refrigeration system with variable rotation speed

Authors

YE Meng-ying, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
GU Zhong, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
XIE Jing, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing & Preservation, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering 〔Shanghai Ocean University〕, Shanghai 201306, China

Abstract

Objective: This study aimed to research the influence of different rotation speed of high-temperature compressor on the performance of NH₃/CO₂ cascade refrigeration system under various seasons and evaporation temperature of 25 ℃. Methods: The NH₃/CO₂ cascade refrigeration system model was established and its reliability was verified in this paper. The relationship between the rotation speed of high-temperature compressor and the evaporation temperature, the discharge temperature, the intermediate temperature, high-temperature compressor power, cooling capacity, Coefficient of Performance （COP） of cascade refrigeration system was calculated and analyzed. Results: The relative error of the simulation model for predicting the heat transfer was less than 14.1%. The cooling capacity of the system in spring, summer, autumn and winter respectively increases by 31.7%, 41.7%, 33.9% and 25.2% as the rotation speed of the high-temperature compressor increased from 2 300 r/min to 3 300 r/min, and the cooling capacity was the highest in winter in the low-speed range. In addition, high temperature compressor power showed a two-stage upward trend, increased by 40%～45%. Conclusion: There was a maximum COP and corresponding optimal high- temperature compressor speed. Based on the adaptability of the system to different seasons, a scheme of variable rotation speed NH₃/CO₂ cascade refrigeration system is proposed. Compared with the system with constant speed, the power consumption could be reduced by 19.9% per year.

Publication Date

9-28-2021

First Page

104

Last Page

109,116

DOI

10.13652/j.issn.1003-5788.2021.09.017

Recommended Citation

Meng-ying, YE; Zhong, GU; and Jing, XIE (2021) "Research on performance of NH₃/CO₂ cascade refrigeration system with variable rotation speed," Food and Machinery: Vol. 37: Iss. 9, Article 17.
DOI: 10.13652/j.issn.1003-5788.2021.09.017
Available at: https://www.ifoodmm.cn/journal/vol37/iss9/17

References

[1] 梁政, 申江, 韩思雨. 回热器与制冷工质对复叠制冷系统性能的影响[J]. 食品与机械, 2020, 36（10）: 65-70, 86.
[2] 轩福臣, 谢晶. 跨临界CO₂制冷循环系统与应用研究进展[J]. 食品与机械, 2019, 35（8）: 226-231.
[3] 申江, 张于峰, 李林, 等. 氨制冷技术研究进展[J]. 化工学报, 2008, 59（S2）: 29-36.
[4] 张琥. 我国食品企业氨泄漏事故致因研究[D]. 北京: 中国矿业大学（北京）, 2018: 1-2.
[5] 中国人民共和国国家质量监督检验检疫总局. 危险化学品重大危险源辨识: GB 18218—2009[S]. 北京: 中国标准出版社, 2009: 1-5.
[6] PUROHIT N, SHARMA V, SAWALHA S, et al. Integrated supermarket refrigeration for very high ambient temperature[J]. Energy, 2018, 165（5）: 72-90.
[7] MA Ming, YU Jian-lin, WANG Xiao. Performance evaluation and optimal configuration analysis of a CO₂/NH₃ cascade refrigeration system with falling film evaporator-condenser[J]. Energy Conversion and Management, 2014, 79（2）: 24-31.
[8] 田雅芬, 赵兆瑞, 邢子文, 等. CO₂复叠制冷系统与载冷剂制冷系统适用范围研究[J]. 制冷学报, 2016, 37（2）: 22-29.
[9] 顾兆林, 刘红娟, 李云. NH₃/CO₂低温制冷系统研究[J]. 西安交通大学学报, 2002, 36（5）: 536-540.
[10] 余晓明, 冯熙, 李金峰, 等. 复叠制冷系统热力分析与冷凝蒸发器冷凝温度的优化[J]. 流体机械, 2010, 38（9）: 73-78, 68.
[11] PATEL V, PANCHAL D, PRAJAPATI A, et al. An efficient optimization and comparative analysis of cascade refrigeration system using NH₃/CO₂ and C₃H₈/CO₂ refrigerant pairs[J]. International Journal of Refrigeration, 2019, 102: 62-76.
[12] DOPAZO J A, FERNNDEZ-SEARA J. Experimental evaluation of a cascade refrigeration system prototype with CO₂ and NH₃ for freezing process applications[J]. International Journal of Refrigeration, 2011, 34（1）: 257-267.
[13] 赵瑞昌, 杨永安, 赖锋. 压缩机频率对R410A/R410A复叠式制冷系统性能的影响[J]. 制冷学报, 2019, 40（2）: 95-99.
[14] 陈海瑞, 杨永安, 孔帅, 等. 蒸发温度和压缩机频率对复叠式制冷系统的影响研究[J]. 低温与超导, 2020, 48（2）: 93-97.
[15] 张春路. 制冷空调系统仿真原理与技术[M]. 北京: 化学工业出版社, 2012.
[16] 杨永安, 李瑞申, 孙志利, 等. 高温压缩机变转速的复叠式热泵系统性能实验研究[J]. 制冷学报, 2020, 41（3）: 65-70.