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On the design and evaluation of open volumetric air receiver for process heat applications

机译：关于过程热应用的开放式容积空气接收器的设计和评估

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India receives abundant radiant energy from the sun on account being located in the equatorial solar belt. Especially, an annual global solar radiation of about ≥2400 kWh/m~2 is received in Rajasthan and northern Gujarat. It can be harnessed, for instance, using linear and point focusing based concentrated solar thermal concepts. Parabolic trough and linear Fresnel based technologies belong to the first and heliostat based power tower and parabolic dish technologies belong to the latter category. As a part of research initiative at IIT Jodhpur heliostat based concentrated solar tower concept using an open volumetric air receiver concept is preferred to achieve a high temperature. This can be employed as process heat. This technology includes sub-system, such as, thermal energy storage, and heat rejection/exchange systems. In particular, the presented paper describes the design, development and evaluation of an open volumetric air receiver. A computational fluid dynamics tool, namely, ANSYS-FLUENT is utilized for evaluation purpose. The obtained hot air (heat transfer fluid) can be employed, for instance, in metal processing applications. The presented design aspects of the open volumetric air receiver are: 1. The flow instability in an open volumetric air receiver; 2. Influence of material property on modeling of open air receiver; 3. Heat transfer experiment with a porous body; 4. Design and evaluation of a mixer to obtain an uniform temperature at the open volumetric air receiver outlet; 5. Design and evaluation of a re-circulating air injection system. Finally, a 4kWth experimental facility, which is being commissioned at IIT Jodhpur to test solar thermal sub-systems, such as, receiver, heat exchanger, thermal energy storage is also discussed, in brief.
机译：印度位于赤道太阳带，因此从太阳获得了大量的辐射能。特别是，拉贾斯坦邦和古吉拉特邦北部每年收到约2400 kWh / m〜2的年度全球太阳辐射。例如，可以使用基于线性和点聚焦的集中式太阳热能概念来利用它。基于抛物线槽和线性菲涅耳的技术属于第一类，基于定日镜的电塔和抛物线形碟形技术属于后一类。作为IIT乔德普尔定日镜的定日镜研究计划的一部分，采用开放式容积式空气接收器概念的聚光太阳能塔概念是实现高温的首选。这可以用作过程加热。该技术包括子系统，例如热能存储和散热/交换系统。特别是，本文介绍了开放式容积式空气接收器的设计，开发和评估。计算流体动力学工具即ANSYS-FLUENT用于评估目的。所获得的热空气（传热流体）可以用于例如金属加工应用中。所公开的容积式空气接收器的设计方面是：1.容积式空气接收器中的流动不稳定性; 2.材料特性对露天接收器建模的影响; 3.多孔体的传热实验; 4.设计和评估混合器，以在敞开的容积式空气接收器出口处获得均匀的温度; 5.循环空气喷射系统的设计和评估。最后，还简要讨论了一个4kWth的实验设施，该设施将在焦特布尔IIT投入运行，以测试太阳能热子系统，例如接收器，热交换器，热能存储。

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