研究目的
To investigate the thermodynamic performance of a novel solar powered multi-effect refrigeration system.
研究成果
The proposed solar-driven triple-effect refrigeration cycle can provide cooling at multiple temperature levels with efficiencies influenced by various operating parameters. The central receiver and heliostat field are major sources of exergy destruction. Improvements in first and second-law efficiencies are possible by optimizing parameters like turbine pressures and evaporator temperatures. Future work should focus on experimental validation and design enhancements to reduce irreversibilities.
研究不足
The study is based on theoretical modeling and simulations, not experimental validation. Assumptions such as steady-state processes, negligible pressure drops, and heat losses may not hold in real-world applications. The use of specific weather data (Dhahran) limits generalizability to other locations. The high irreversibility in central receiver and heliostat field indicates design inefficiencies that need optimization.
1：Experimental Design and Method Selection:
The study involves energy and exergy analyses of a proposed solar-driven triple-effect refrigeration cycle, which integrates a solar tower with central receiver, steam Rankine cycle, absorption refrigeration cycle, ejector refrigeration cycle, and cascade refrigeration cycle. Mathematical models based on thermodynamic laws were used for analysis.
2：Sample Selection and Data Sources:
Dhahran weather data and specific operating conditions (e.g., temperatures, pressures) were used as inputs for the simulations.
3：List of Experimental Equipment and Materials:
The system includes components such as heliostat field, central receiver with molten salt (60/40% NaNO3/KNO3 mixture), heat recovery vapor generator, turbines, compressors, ejectors, evaporators, condensers, pumps, and heat exchangers. No specific brands or models are mentioned; it is a theoretical study.
4：Experimental Procedures and Operational Workflow:
The analysis was computational, involving steady-state simulations with assumptions like negligible pressure drops and heat losses. Parameters were varied (e.g., turbine inlet pressure, hot molten salt temperature) to assess performance.
5：Data Analysis Methods:
Energy and exergy efficiencies were calculated using thermodynamic equations. Validation was performed by comparing results with existing models from literature.
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