Background

Parabolic Dish Solar Collector (PDSC) is a type of solar collector that heats a heat transfer fluid by concentrating sunlight on an absorber chamber and then passing a fluid stream through the absorber. Due to their extensive range of applications, enhancing their efficiency is very essential. Present study investigates the hydrothermal efficiency enhancement of a semi-cone parabolic dish solar collector filled with an oil based hybrid nanofluid.

Method

The studied geometry is a semi-cone shape parabolic dish solar collector equipped with smooth or corrugated absorber chamber. Two different heat fluxes are applied on absorber chamber and Eulerian-Eulerian two-phase model is employed for numerical simulation. The geometrical parameters of PDSC and corrugated plate are analyzed at various nanoparticles concentrations.

Findings

According to result, utilization of nanofluid significantly augments the thermal performance of system. The exergy analysis shows that the growing of nanoparticles amount increases the convection coefficient and pressure loss, but it leads to higher exergy efficiency. Furthermore, the most optimum configuration PDSC is introduced.

中文翻译：

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油基混合纳米流体填充抛物面盘式太阳能集热器的水热效率数值研究

背景

抛物面盘式太阳能集热器 (PDSC) 是一种太阳能集热器，它通过将阳光聚集在吸收器室上，然后使流体流通过吸收器来加热传热流体。由于它们的应用范围很广，因此提高它们的效率非常重要。目前的研究调查了填充油基混合纳米流体的半锥形抛物面盘式太阳能集热器的水热效率提高。

方法

研究的几何形状是一个半锥形抛物面碟形太阳能集热器，配有光滑或波纹状的吸收室。吸收室采用两种不同的热通量，采用欧拉-欧拉两相模型进行数值模拟。PDSC 和波纹板的几何参数在各种纳米颗粒浓度下进行分析。

发现

结果表明，纳米流体的利用显着提高了系统的热性能。火用分析表明，纳米粒子数量的增加会增加对流系数和压力损失，但会导致更高的火用效率。此外，还引入了最优化的配置 PDSC。