研究目的
To perform a detailed exergoeconomic analysis on four proposed configurations of solar-driven steam ejector refrigeration systems integrated with precoolers and/or preheaters to assess their economic performance.
研究成果
The study concludes that operating the system with a relatively low condenser temperature is more efficient thermodynamically and thermoeconomically than changing the system configuration. The fourth configuration, which includes both precooler and preheater, has the highest exergetic efficiency and the lowest total investment cost (0.1891 $/h) among the four configurations. However, the pressure drop in this configuration is expected to be higher, which may influence the preference for configuration 1 in practical applications.
研究不足
The study assumes steady-state conditions and does not account for variations in ambient temperature and solar energy per hour. The pressure drop in the fourth configuration, which is expected to be higher than in other configurations, is not studied.
1：Experimental Design and Method Selection:
The study involves thermodynamic and exergoeconomic analysis of four configurations of solar-driven steam ejector refrigeration systems. The analysis includes the evaluation of exergy destruction, exergy loss, and economic parameters such as cost per exergy unit, investment cost, and exergoeconomic factor.
2：Sample Selection and Data Sources:
The systems are analyzed under steady-state conditions with water as the working fluid. The ambient temperature and pressure are assumed to be 303 K and 101.3 kPa, respectively, considering the climate in southern Iran.
3：3 kPa, respectively, considering the climate in southern Iran.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The systems include solar collectors, generators, ejectors, pumps, evaporators, condensers, preheaters, and precoolers. The heat exchangers are assumed to be made of copper.
4：Experimental Procedures and Operational Workflow:
The analysis starts with the first law of thermodynamics to assess work and heat transfer, followed by exergy balance equations to evaluate exergy destruction and losses. The cost balance equation is then applied for exergoeconomic analysis.
5：Data Analysis Methods:
The exergetic efficiency, coefficient of performance (COP), and solar thermal ratio are calculated. The investment cost of components is evaluated based on specified size and capacity, and the exergoeconomic factor and relative cost difference are analyzed.
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