Kumar Kolli Harish, Daabo Ahmed M, Karmakar Malay K, Hirani Harish
CSIR - Central Mechanical Engineering Research Institute, Durgapur, 713209, West Bengal, India.
Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
Environ Sci Pollut Res Int. 2022 May;29(22):32335-32367. doi: 10.1007/s11356-022-18586-4. Epub 2022 Feb 10.
Energy demand in the present scenario is rising to meet the increasing demands of energy usage. On the other hand, the use for renewable energy sources now becomes essential to mitigate the climate change as well as to reduce gradual depletion of fossil fuels. Among these renewable energy sources, solar energy particularly solar thermal systems have phenomenal scope in present and future research. In solar thermal systems, concentrators are used to extract the energy from solar irradiation and convert it into useful form. Among different types of solar concentrators, the parabolic dish solar concentrator is preferred as it has high efficiency, high power density, low maintenance, and potential for long durability. In this paper, a detailed review has been carried out on the design parameters like focal length, concentration ratio, and rim angle of the parabolic dish solar concentrator system for achieving higher overall efficiency. The effects of different geometrical shapes of receivers on the overall heat transfer rates are discussed in this paper. Conical shaped receiver is having high overall optical and thermal efficiency comparing with other shapes of receivers. This study also shows that how the thermal performance of the receiver gets enhanced by 10-13% using nanofluids in place of general heat transfer fluids. The paper highlights different models using ray-tracing method for estimation and evaluation of the solar irradiation distribution on the receiver surface. The empirical relations for the design of parabolic dish solar concentrator system are derived for estimating overall concentrator efficiency and heat available at the receiver are given in this review. From the literature, the thermal performance of the receiver affecting the overall performance of the system is observed. Thermal losses due to geometrical properties and ordination of the receiver are explained in the observation section.
在当前情况下，能源需求不断上升，以满足日益增长的能源使用需求。另一方面，使用可再生能源对于缓解气候变化以及减少化石燃料的逐渐枯竭变得至关重要。在这些可再生能源中，太阳能尤其是太阳能热系统在当前和未来的研究中具有巨大的潜力。在太阳能热系统中，聚光器用于从太阳辐射中提取能量并将其转化为有用的形式。在不同类型的太阳能聚光器中，抛物面碟式太阳能聚光器因其具有高效率、高功率密度、低维护成本和长寿命潜力而备受青睐。本文对抛物面碟式太阳能聚光器系统的焦距、聚光比和边缘角等设计参数进行了详细综述，以实现更高的整体效率。本文讨论了不同几何形状的接收器对整体传热速率的影响。与其他形状的接收器相比，圆锥形接收器具有较高的整体光学和热效率。这项研究还表明，使用纳米流体代替普通传热流体可使接收器的热性能提高10% - 13%。本文重点介绍了使用光线追踪方法估算和评估接收器表面太阳辐射分布的不同模型。本文给出了抛物面碟式太阳能聚光器系统设计的经验关系式，用于估算聚光器的整体效率和接收器可获得的热量。从文献中可以观察到，接收器的热性能会影响系统的整体性能。在观察部分解释了由于接收器的几何特性和排列导致的热损失。
