Comparative optimization and exergy analysis of solar–LNG integrated Rankine cycles among different hot tank outlet temperatures
Year: 2026
Type: article
Abstract: With solar energy playing an increasingly crucial role in the worldwide shift toward renewable resources, a comparative two-objective optimization is performed on a two-tank solar field integrated with an organic Rankine cycle (ORC) and liquefied natural gas under three hot tank outlet temperatures of 200 ∘ C, 250 ∘ C, and 300 ∘ C. Optimization objectives include maximizing the system efficiency and minimizing the electricity production cost (EPC). The comprehensive optimization includes 8 variables, 11 working fluids, and 16 structures, with the results analyzed using the thermodynamic weight. Detailed analysis is further performed on two representative scenarios: the Equal Scenario and the Thermodynamic Scenario. The findings show that the R-ORC is preferred when thermodynamic considerations are the primary focus, whereas the B-ORC is more beneficial when the economic aspect is the main priority. At a hot tank outlet temperature of 300 ∘ C, the Equal Scenario attains 97.81% of the Thermodynamic Scenario‘s system efficiency while reducing EPC by as much as 9.35%. This result demonstrates that a slight sacrifice in thermodynamic performance could yield notable economic improvements. The condenser exhibits the highest exergy loss fraction among all components. • Comparative optimizationunder different hot tank outlet temperatures. • 8 operational variables are included as optimization variables. • Up to 16 system configurations are included during the optimization. • Two typical scenarios are analyzed and compared from multiple perspectives. • Exergy destruction and exergy loss fraction are analyzed and compared.
Authors: Han Zhang, Huiming Mao
Institution: Tianjin Renai College
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,170
OpenAlex ID: W7125968867