The open volumetric air receiver (OVAR) based systems can be used for metals processing operation, such as, the heat treatment of aluminum. Some important aspects, related to the technology adaptation, are (a) the selection of receiver design, (b) the integration of an application, based on hot air, with an OVAR, and (c) mitigation of dust deposition in the porous absorber of an OVAR. Therefore, the presented aspects are (a) literature review on the porous absorbers for OVARs, (b) literature review on solar furnace, and an innovative OVAR-based solar convective furnace (SCF) for the heat treatment of aluminum, and (c) mechanism of transport and deposition of dust in an absorber pore. These reveal that (a) the design improvements are required, to enhance the thermal efficiency of OVARs, for an input power to air mass flow rate ratio exceeding 900 kJ/kg, (b) the SCF system, based on OVAR, is plausible, and (c) the dust deposition in an absorber pore may be mitigated. The findings will be useful for deployment and operation of the OVAR based systems in arid deserts.

中文翻译：

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开放式容积式空气接收器：创新应用和重大挑战

基于开放式容积式空气接收器 (OVAR) 的系统可用于金属加工操作，例如铝的热处理。与技术适应相关的一些重要方面是 (a) 接收器设计的选择，(b) 基于热空气的应用与 OVAR 的集成，以及 (c) 减少多孔吸收器中的灰尘沉积的 OVAR。因此，提出的方面是（a）关于 OVAR 多孔吸收器的文献综述，（b）关于太阳能炉的文献综述，以及用于铝热处理的基于 OVAR 的创新太阳能对流炉（SCF），以及（c）灰尘在吸收器孔隙中的传输和沉积机制。这些表明 (a) 需要改进设计，以提高 OVAR 的热效率，对于超过 900 kJ/kg 的输入功率与空气质量流量比，（b）基于 OVAR 的 SCF 系统是合理的，并且（c）可以减轻吸收器孔隙中的灰尘沉积。这些发现将有助于在干旱沙漠中部署和运行基于 OVAR 的系统。