Heating performance evaluation of Transcritical CO2 Air-Source Heat Pump System with Flash-Recharge
[1]WANG Dingbiao,Chen Chen,YANG Yushen,et al.Heating performance evaluation of Transcritical CO2 Air-Source Heat Pump System with Flash-Recharge[J].Journal of Zhengzhou University (Engineering Science),2027,48(XX):1-9.[doi:10.13705/j.issn.1671-6833.2026.06.014]
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
48
Number of periods:
2027 XX
Page number:
1-9
Column:
Public date:
2027-12-10
- Title:
- Heating performance evaluation of Transcritical CO2 Air-Source Heat Pump System with Flash-Recharge
- Keywords:
- CO2 HP; benchmark system; flash technology; calculation model of gas supplement process; thermodynamic modeling
- CLC:
- TK14 TK123
- Abstract:
- In order to enhance the low-temperature heating performance of the transcritical CO2 air-source heat pump system and broaden the operating range of the low-temperature operating conditions, the thermodynamic modeling of flash gas-supplementing is too ideal and the actual operating conditions deviate greatly. The flash gas-supplementing transcritical CO2 air source heat pump heating system ( CO2 HPVI, FLA) was studied. Through the non-steady-state flow energy equation, based on the new thermodynamic model of pressure dynamic adjustment in the process of air supply, a mathematical model for comprehensive evaluation of energy saving, environmental and economic performance of the system was established. Harbin ( severe cold area) and Beijing ( cold area) were selected as working conditions, and coal fired boiler, gas fired wall mounted boiler and direct electric heating are selected. The three traditional heating methods were analyzed and compared in terms of thermal performance, economy and environmental emission performance. The results indicated that compared with the reference system, the COP of the flash gas supplementing system can be increased by 38. 5% and the exergy loss can be reduced by more than 20% under the same working conditions. Compared with the baseline system, the CO2 , SO2 and NOx emissions of the CO2 HPVI, FLA system are reduced by 19. 47%. At the same time, in the extremely cold region, the life cycle cost of the CO2 HPVI, FLA system in the eighth year can be reduced by 39. 73% compared with the CFB system. Therefore, the system is significantly superior to the benchmark system in terms of comprehensive performance ( energy, exergy, economic and environmental evaluation models) , providing a feasible alternative to clean heating.
- References:
-
[1] Wang Dingbiao, Duan Hongxin, Wang Guanghui, et al. Research progress of control optimization strategies for transcritical CO2 cycle system[J]. Journal of Zhengzhou University ( Engineering Science), 2024, 45(2): 1-11. [王定标, 段鸿鑫, 王光辉, 等. 跨临界CO2循环系统控制优化策略的研究进展[J]. 郑州大学学报(工学版), 2024, 45(2): 1-11.]
[2] Wang Youdong, Li Xiaoqiong, Guo Yanhua, et al. Thermodynamic performance and CO2 emission analysis of transcritical CO2 two-stage compression refrigeration system with intermediate gas supplementation[J]. Energy , 2025 , 320: 135193.
[3] Dai Baomin, Zhao Xiaoxuan, Liu Shengchun, et al. Heating and cooling of residential annual application using DMS transcritical CO2 reversible system and traditional solutions: An environment and economic feasibility analysis[J]. Energy Conversion and Management, 2020 , 210: 112714.
[4] Chen Junbin, Guo Cong, Feng Chunyu, et al. Research of CO2 high temperature heat pump for industrial steam generation with data center heat source[J]. International Journal of Refrigeration , 2025 , 173: 185-200.
[5] Dai Baomin, Hao Yunying, Liu Shengchun, et al. Hybrid CO2 air source heat pump system integrating with vapor injection and mechanical subcooling technology for space heating of global application: life cycle techno-energy-enviro-economics assessment[J]. Energy Conversion and Management, 2022 , 271: 116324.
[6] Gholizadeh T, Rostami S, Arabkoohsar A. Performance enhancement of transcritical CO2 compression cycles: techno-environmental analysis and machine learning optimization[J]. Applied Thermal Engineering, 2025 , 266: 125591.
[7] Ouderji Z H, Yu Zhibin. A quasi-two-stage trans-critical CO2 heat pump with in-cycle thermal storage for performance enhancement[J]. Applied Thermal Engineering , 2025 , 258: 124720.
[8] Liu Xinxin, Wang Dingbiao, Peng Xu, et al. Experimental study on performance and compressor characteristics of transcritical CO2 heat pump system[J]. Applied Thermal Engineering , 2024 , 250: 123524.
[9] Wang Ji, Belusko M, Semsarilar H, et al. An optimisation study on a real-world transcritical CO2 heat pump system with a flash gas bypass[J]. Energy Conversion and Management, 2022, 251: 114995.
[10] Li Yifan, Li Mengxi, Yang Junlan. Experimental and numerical study on transcritical CO2 air source heat pump water heater[J]. Applied Thermal Engineering , 2025 , 258: 124577.
[11] Lu Shixiang. Study on the performance of the vapor injected PVT heat pump system for heating, power generation and cooling[D]. Dalian: Dalian University of Technology , 2020. [路世翔. 中间补气型PVT热泵热电冷联供系统性能研究[D]. 大连: 大连理工大学, 2020.]
[12] Wang Di, Wang Dingbiao, Yang Yushen, et al. Simulation and experimental analyses on the optimal discharge pressure of a transcritical CO2 heat pump system[J]. Journal of Zhengzhou University (Engineering Science), 2021, 42(4): 33-39. [王迪, 王定标, 杨雨燊, 等. 跨临界CO2热泵系统最优排气压力模拟与实验研究[J]. 郑州大学学报(工学版), 2021, 42(4): 33-39.]
[13] Wang Yufeng, Wang Dandong, Yu Binbin, et al. Experimental and numerical investigation of a CO2 heat pump system for electrical vehicle with series gas cooler configuration[J]. International Journal of Refrigeration, 2019, 100: 156-166.
[14] Zhang Hao. Heating performance analysis and optimization of the transcritical CO2 heat pump system[D]. Zhengzhou: Zhengzhou University, 2023. [张浩. 跨临界CO2热泵系统供暖性能分析与优化研究[D]. 郑州: 郑州大学, 2023.]
[15] Yang Yushen. Study on the performance of PV/T- air source heat pump integrated energy system[D]. Zhengzhou: Zhengzhou University , 2024. [杨雨燊. PV/T-空气源热泵综合能源系统性能研究[D]. 郑州: 郑州大学, 2024.]
[16] Dang Chaobin, Hihara E. In-tube cooling heat transfer of supercritical carbon dioxide. Part 1. Experimental measurement[J]. International Journal of Refrigeration, 2004, 27(7): 736-747.
[17] Dang Chaobin, Hihara E. In-tube cooling heat transfer of supercritical carbon dioxide. Part 2. Comparison of numerical calculation with different turbulence models[J]. International Journal of Refrigeration, 2004, 27(7): 748-760.
[18] Dittus F W, Boelter L M K . Heat transfer in automobile radiators of the tubular type[J]. International Communications in Heat and Mass Transfer, 1985, 12(1): 3-22.
[19] Liu Shengchun, Li Zheng, Dai Baomin, et al. Energetic, economic and environmental analysis of air source transcritical CO2 heat pump system for residential heating in China[J]. Applied Thermal Engineering, 2019, 148: 1425-1439 .
[20] Caputo Antonio C, Pelagagge P acifico M, Salini P aolo. Joint economic optimization of heat exchanger design and maintenance policy[J]. Applied Thermal Engineering, 2011, 31(8-9): 1381-1392.
[21] Olympios Andreas V, Song J ian, Ziolkowski Aleksander, et al. Data-driven compressor performance maps and cost correlations for small-scale heat-pumping applications[J]. Energy, 2024, 291: 130171.
[22] Cao Feng, Ye Zuliang, Wang Yikai. Experimental investigation on the influence of internal heat exchanger in a transcritical CO2 heat pump water heater[J]. Applied Thermal Engineering , 2020 , 168: 114855.
- Similar References:
Memo
-
Last Update:
2026-06-29
