Exergy analysis of transcritical two stage CO₂ refrigeration system

Authors

XU Hao, 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
GAO Jian-ye, 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
WANG Jin-feng, 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 and Preservation, 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 and Preservation, Shanghai 201306, China;National Experimental Teaching Demonstration Center for Food Science and Engineering, Shanghai 201306, ChinaFollow

Corresponding Author(s)

谢晶（1968—），女，上海海洋大学教授，博士。E-mail:jxie@shou.edu.cn

Abstract

Objective: In order to improve the energy efficiency of the transcritical two stage CO₂ refrigeration system, the conventional exergy analysis and advanced exergy analysis of the system were conducted. Methods: Advanced exergy analysis provides more valuable information on the interaction between system components and the potential for component improvement by splitting the exergy destruction into endogenous/exogenous and unavoidable/avoidable parts. Results: The results indicated that the transcritical two stage CO₂ refrigeration system had significant potential for efficiency improvement. The priority of the optimized components from conventional and advanced exergy analysis was different. The advanced exergy analysis showed that performance optimization of the high-pressure stage compressor, low-pressure stage compressor and evaporator were the focus of improving system energy efficiency. Conclusion: The endogenous avoidable exergy destruction of the high-pressure stage compressor, low-pressure stage compressor and evaporator accounted for 20.9%, 15.2% and 36.5% of the endogenous avoidable exergy destruction of the system, respectively. The improvement of the high-pressure stage compressor, low-pressure stage compressor and evaporator are able to reduce their exergy destruction by 58.8%, 49.3% and 90.2%, respectively. The conventional exergy analysis cannot provide such recommendations.

Publication Date

10-20-2023

First Page

77

Last Page

84

DOI

10.13652/j.spjx.1003.5788.2022.80738

Recommended Citation

Hao, XU; Jian-ye, GAO; Jin-feng, WANG; and Jing, XIE (2023) "Exergy analysis of transcritical two stage CO₂ refrigeration system," Food and Machinery: Vol. 39: Iss. 7, Article 12.
DOI: 10.13652/j.spjx.1003.5788.2022.80738
Available at: https://www.ifoodmm.cn/journal/vol39/iss7/12

References

[1] SONG X, LU D X, LEI Q, et al. Energy and exergy analyses of a transcritical CO₂ air conditioning system for an electric bus[J]. Applied Thermal Engineering, 2021, 190: 116819.
[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. XUAN F C, XIE J. Research progress of trans-critical CO₂ refrigeration cycle system and application[J]. Food & Machinery, 2019, 35（8）: 226-231.
[3] GULLO P, ELMEGAARD B, CORTELLA G. Advanced exergy analysis of a R744 booster refrigeration system with parallel compression[J]. Energy, 2016, 107: 562-571.
[4] 宋昱龙, 王海丹, 殷翔, 等. 跨临界CO₂蒸气压缩式制冷与热泵技术综述[J]. 制冷学报, 2021, 42（2）: 1-24. SONG Y L, WANG H D, YIN X, et al. Review of transcritical CO₂ vapor compression technology in refrigeration and heat pump[J]. Journal of Refrigeration, 2021, 42（2）: 1-24.
[5] 赖艳华, 王庆为, 吕明新, 等. R404A/CO₂复叠式制冷系统的火用分析[J]. 山东大学学报（工学版）, 2011, 41（6）: 115-121. LAI Y H, WANG Q W, LU M X, et al. Exergy analysis of the R404A /CO₂ cascade refrigeration system[J]. Journal of Shandong University （Engineering Science）, 2011, 41（6）: 115-121.
[6] SUN Y Y, WANG J F, XIE J. Performance optimizations of the transcritical CO₂ two-stage compression refrigeration system and influences of the auxiliary gas cooler[J]. Energies, 2021, 14（17）: 5 578.
[7] KELLY S, TSATSARONIS G, MOROSUK T. Advanced exergetic analysis: Approaches for splitting the exergy destruction into endogenous and exogenous parts[J]. Energy, 2008, 34（3）: 384-391.
[8] CHOWDHURY S, MANDAL B K, ROY R. A review on energy and exergy analysis of two-stage vapour compression refrigeration system[J]. International Journal of Air-Conditioning and Refrigeration, 2019, 27（2）: 1-9.
[9] 杨俊兰, 高思雨, 李久东. CO₂跨临界制冷循环系统火用经济分析[J]. 太阳能学报, 2020, 41（1）: 60-65. YANG L J, GAO S Y, LI J D. Exergoeconomic analysis of CO₂ transcritical refrigeration cycle system[J]. Acta Energiae Solaris Sinica, 2020, 41（1）: 60-65.
[10] LIU Z, LIU B, GUO J Z, et al. Conventional and advanced exergy analysis of a novel transcritical compressed carbon dioxide energy storage system[J]. Energy Conversion and Management, 2019, 198: 11807.
[11] MOROSUK T, TSATSARONIS G. Advanced exergetic evaluation of refrigeration machines using different working fluids[J]. Energy, 2009, 34（12）: 2 248-2 258.
[12] TSATSARONIS G, MOROSUK T. Advanced thermodynamic （exergetic） analysis[J]. Journal of Physics: Conference Series, 2012, 395: 012160.
[13] TSATSARONIS G, KELLY S O, MOROSUK T V, et al. Endogenous and exogenous exergy destruction in thermal systems[C]// American Society of Mechanical Engineers （ASME） International Mechanical Engineering Congress and Exposition. Chicago: [s.n.], 2006: 311-317.
[14] SARKAR J, JOSHI D. Extended exergy analysis based comparison of subcritical and transcritical refrigeration systems[J]. International Journal of Air-Conditioning and Refrigeration, 2016, 24（2）: 1-9.
[15] MOHAMMADI Z, FALLAH M, MAHMOUDI S M S. Advanced exergy analysis of recompression supercritical CO₂ cycle[J]. Energy, 2019, 178: 631-643.
[16] 管海清, 马一太, 李敏霞, 等. CO₂跨临界循环热力学对比分析[J]. 流体机械, 2004（6）: 39-42. GUAN H Q, MA Y T, LI M X, et al. Thermodynamic comparative analysis on CO₂ transcritical cycle[J]. Fluid Machinery, 2004（6）: 39-42.
[17] WANG H L, MA Y T, TIAN J R, et al. Theoretical analysis and experimental research on transcritical CO₂ two stage compression cycle with two gas coolers （TSCC+TG） and the cycle with intercooler （TSCC+IC） [J]. Energy Conversion and Management. 2011, 52（8/9）: 2 819-2 828.
[18] GHOLAMIAN E, HANAFIZADEH P, AHMADI P. Advanced exergy analysis of a carbon dioxide ammonia cascade refrigeration system[J]. Applied Thermal Engineering, 2018, 137: 689-699.
[19] AMINYAVARI M, NAJAFI B, SHIRAZI A, et al. Exergetic, economic and environmental （3E） analyses, and multi-objective optimization of a CO₂ /NH₃ cascade refrigeration system[J]. Applied Thermal Engineering, 2014, 65（1/2）: 42-50.
[20] FALLAH M, MAHMOUDI S M S, YARI M, et al. Advanced exergy analysis of the Kalina cycle applied for low temperature enhanced geothermal system[J]. Energy Conversion and Management, 2016, 108: 190-201.
[21] MOROSUK T, TSATSARONIS G. A new approach to the exergy analysis of absorption refrigeration machines[J]. Energy, 2007, 33（6）: 890-907.
[22] BAI T, YU J L, YAN G. Advanced exergy analyses of an ejector expansion transcritical CO₂ refrigeration system[J]. Energy Conversion and Management, 2016, 126: 850-861.
[23] YANG D Z, LI Y, XIE J, et al. Exergy destruction characteristics of a transcritical carbon dioxide two-stage compression/ejector refrigeration system for low-temperature cold storage[J]. Energy Reports, 2022, 8: 8 546-8 562.