Considering the Performance Study of ZnO Nanofluid at Different Concentrations for the Full-Spectrum Utilization System
Yangjie Zhuang, Yizhi Tian, Min Li
TL;DR
This study improves solar energy systems by using ZnO nanofluids with varying concentrations to better split and convert the full spectrum of sunlight into electricity and heat.
Contribution
The paper introduces a dynamic nanofluid concentration control mechanism for enhanced adaptability and full-spectrum utilization in solar systems.
Findings
Higher nanofluid concentrations improve thermal efficiency but reduce photovoltaic efficiency.
A peak comprehensive efficiency of 50.63% was achieved at 280 ppm ZnO concentration.
At 420 ppm, thermal efficiency peaks as visible light transmittance approaches zero.
Abstract
Single photovoltaic (PV) and photothermal (PT) technologies in solar energy applications are limited to the conversion of visible light and high-quality infrared spectra, respectively; this limitation results in relatively low energy utilization efficiency. In contrast, liquid spectrum-splitting technology enables the separation and conversion of various spectral bands, with the composition of the medium playing a pivotal role in the efficient utilization of the full spectrum. Compared to previous static spectral-splitting systems, this study introduces a dynamic nanofluid concentration control mechanism, which actively balances PV and PT contributions based on real-time solar conditions, achieving higher adaptability and efficiency. This study proposes a concentrated photovoltaic-thermal (CPVT) system based on the variable concentration of spectrum-splitting media, employing a…
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Taxonomy
TopicsSolar Thermal and Photovoltaic Systems · Photovoltaic System Optimization Techniques · Nanofluid Flow and Heat Transfer