Exergoeconomic analysis and optimization of single-pressure singlestage and multi-stage CO2 transcritical power cycles for engine waste heat recovery: A comparative study
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Exergoeconomic analysis and optimization of single-pressure singlestage and multi-stage CO2 transcritical power cycles for engine waste heat recovery: A comparative study
- 发表刊物：
- Energy
- 摘要：
- The present work mainly focuses on the thermodynamic and exergoeconomic comparisons between the
novel single-pressure multi-stage CDTPCs (carbon dioxide transcritical power cycles) and single-pressure
single-stage CDTPC for engine waste heat recovery. A method based on exergy fuel distribution is proposed
to calculate the fuel cost for the bottoming CDTPCs. Parametric analysis is conducted to study
effects of the decision variables on the performances of the considered CDTPCs, which are also optimized
and compared. The thermodynamic study shows that the double-stage CDTPC can produce the highest
net power output of 517.27 kW for a 2928 kW engine at exhaust gas temperature of 470 C. The exergoeconomic
study reveals that the single-stage CDTPC has the lowest total unit cost when exhaust gas
temperature is 300e600 C and the double-stage CDTPC is recommended when exhaust gas temperature
is 530e600 C due to better thermodynamic and exergoeconomic performances. Meanwhile, the triplestage
CDTPC is not recommended when exhaust gas temperature is 300e600 C considering thermodynamics
and exergoeconomics. A multi-objective optimization is also conducted to obtain an optimal
condition for the considered CDTPCs for the case study.
- 合写作者：
- 王顺森，吴闯，李军
- 卷号：
- 142
- 页面范围：
- 559-577
- 是否译文：
- 否
- 发表时间：
- 2018-03-01