TY - GEN
T1 - Ideal Thermodynamic Model and Parameter Analysis of Ejector Large Temperature Drop Cogeneration System
AU - Lin, Jiyou
AU - Li, Fangyuan
AU - Zhou, Jiashuo
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
PY - 2025
Y1 - 2025
N2 - An ideal thermodynamic model of a complex heat-work conversion system with two finite heat reservoirs is constructed, which indicates the performance limit and optimization potential of a practical two heat reservoirs system with approximately constant heat capacity. The ideal thermodynamic model is qualitatively and quantitatively classified by analyzing the exergy balance relationship between the heat engine region and the heat pump region. The analytical solutions of thermodynamic performance limit and dimensionless process parameters are solved. The influence of different external work input or output conditions on the thermodynamic performance of the system is emphatically analyzed. The results show that the maximum process work of the parallel flow ideal thermodynamic model is more conducive to realizing the thermal process with a large temperature drop. The ideal thermodynamic model is used to evaluate the ejector large temperature drop cogeneration system. The results show that the system heat exchange perfectibility of thermal output mode, power output mode, and cogeneration mode is 62.70%, 43.44%, and 54.13%, respectively. Affected by the efficiency of the expander and generator, the net power output of the ejector large temperature drop cogeneration system with a total heat exchange of 15 kW is only 0.38 kW, and the thermal efficiency of the system is only 4.57%, which indicates that the thermal performance of the system still has great potential for improvement.
AB - An ideal thermodynamic model of a complex heat-work conversion system with two finite heat reservoirs is constructed, which indicates the performance limit and optimization potential of a practical two heat reservoirs system with approximately constant heat capacity. The ideal thermodynamic model is qualitatively and quantitatively classified by analyzing the exergy balance relationship between the heat engine region and the heat pump region. The analytical solutions of thermodynamic performance limit and dimensionless process parameters are solved. The influence of different external work input or output conditions on the thermodynamic performance of the system is emphatically analyzed. The results show that the maximum process work of the parallel flow ideal thermodynamic model is more conducive to realizing the thermal process with a large temperature drop. The ideal thermodynamic model is used to evaluate the ejector large temperature drop cogeneration system. The results show that the system heat exchange perfectibility of thermal output mode, power output mode, and cogeneration mode is 62.70%, 43.44%, and 54.13%, respectively. Affected by the efficiency of the expander and generator, the net power output of the ejector large temperature drop cogeneration system with a total heat exchange of 15 kW is only 0.38 kW, and the thermal efficiency of the system is only 4.57%, which indicates that the thermal performance of the system still has great potential for improvement.
KW - Combined Heat and Power (CHP)
KW - Ideal Thermodynamic Model
KW - Thermodynamic Analysis
UR - https://www.scopus.com/pages/publications/105022738638
U2 - 10.1007/978-981-95-3249-0_24
DO - 10.1007/978-981-95-3249-0_24
M3 - 会议稿件
AN - SCOPUS:105022738638
SN - 9789819532483
T3 - Environmental Science and Engineering
SP - 246
EP - 255
BT - Proceedings of the 12th International Conference on Cold Climate HVAC and Energy (Volume 1) - CCHVAC 2025
A2 - Ni, Long
A2 - Wang, Peng
A2 - Li, Jiqin
A2 - Liu, Yongxin
PB - Springer Science and Business Media Deutschland GmbH
T2 - 12th International Conference on Cold Climate HVAC and Energy, CCHVAC 2025
Y2 - 6 August 2025 through 8 August 2025
ER -