TY - JOUR
T1 - Comprehensive Assessment of a Coupled LiBr/H2O Absorption Refrigeration/ORC System for Low-Grade Residual Heat Recovery Based on Advanced Exergy and Exergoeconomic Analysis
AU - Zhou, Tian
AU - Liu, Jiayu
AU - Ren, Jingzheng
AU - Yang, Sheng
N1 - Funding Information:
The authors appreciate the National Natural Science Foundation of China (nos. 51676209, 22008265, and 52076217), the Natural Science Foundation of Hunan Province (grant number: 2020JJ5763), and the Collaborative Innovation Center of Building Energy Conservation and Environmental Control.
Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.
PY - 2022/5/9
Y1 - 2022/5/9
N2 - Conventional and advanced exergy and exergoeconomic analyses are investigated on a coupled LiBr/H2O cycle/ORC system, which recovers low-grade residual heat to generate electricity. Exergy destruction rates, exergy destruction cost rates, and investment cost rates are calculated based on the exergy balance, cost balance, and auxiliary equations. The results indicate that 32.02% of the irreversibility rates, 37.66% of the irreversibility cost rates, and 25.83% of the investment cost rates can be eliminated. The ORC evaporator contributes to the highest irreversibility rate, and the LiBr absorber has the supreme investment cost rate. 83.17% of the exergy destruction rates are endogenous, which means that each component itself has a critical effect on system performance. In the advanced exergoeconomic analyses, 77.30% of the investment cost is generated by the components themselves. Except for LiBr pumps, other components reduce their exergy destruction cost rates preferentially. Optimizing methods to decrease the irreversibility of the system are also provided by this analysis.
AB - Conventional and advanced exergy and exergoeconomic analyses are investigated on a coupled LiBr/H2O cycle/ORC system, which recovers low-grade residual heat to generate electricity. Exergy destruction rates, exergy destruction cost rates, and investment cost rates are calculated based on the exergy balance, cost balance, and auxiliary equations. The results indicate that 32.02% of the irreversibility rates, 37.66% of the irreversibility cost rates, and 25.83% of the investment cost rates can be eliminated. The ORC evaporator contributes to the highest irreversibility rate, and the LiBr absorber has the supreme investment cost rate. 83.17% of the exergy destruction rates are endogenous, which means that each component itself has a critical effect on system performance. In the advanced exergoeconomic analyses, 77.30% of the investment cost is generated by the components themselves. Except for LiBr pumps, other components reduce their exergy destruction cost rates preferentially. Optimizing methods to decrease the irreversibility of the system are also provided by this analysis.
KW - absorption refrigeration cycle
KW - advanced exergy
KW - cascade utilization
KW - exergoeconomic analysis
KW - exergy destruction rate
KW - organic Rankine cycle
UR - https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.1c08611
UR - http://www.scopus.com/inward/record.url?scp=85129336904&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.1c08611
DO - 10.1021/acssuschemeng.1c08611
M3 - Journal article
SN - 2168-0485
VL - 10
SP - 5825
EP - 5837
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 18
ER -
