研究目的
Investigating the thermal performance of the evacuated tube solar collector with WO3/Water Nanofluid.
研究成果
The study demonstrated that adding WO3 nanoparticles to water significantly enhances the thermal performance of evacuated tube solar collectors, with the thermal-optical efficiency reaching up to 72.8%. The efficiency improvement was attributed to the increased thermal conductivity and heat transfer properties of the nanofluid.
研究不足
The study was limited to specific volume fractions of WO3 nanoparticles and mass flux rates. The experiments were conducted under specific geographical and climatic conditions.
1：Experimental Design and Method Selection:
The study involved preparing WO3/Water nanofluid and testing its performance in an evacuated tube solar collector under various conditions.
2：Sample Selection and Data Sources:
WO3 nanoparticles with 90 nm diameter were used, and experiments were conducted at different volume fractions and mass flux rates.
3：List of Experimental Equipment and Materials:
Equipment included an evacuated tube solar collector, ultrasonic probe homogenizer, Pt-100 resistance thermometers, flow sensor, and LP PYRA 03 Pyrometers.
4：Experimental Procedures and Operational Workflow:
The nanofluid was prepared using a two-step method, and its stability was checked. The collector's performance was tested under quasi-steady state conditions.
5：Data Analysis Methods:
Data were analyzed based on the first law of thermodynamics under steady-state conditions, using equations for nanofluid properties and collector efficiency.
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