This document summarizes the design and evaluation of an open volumetric air receiver for industrial process heat applications. Key points: 1) The researchers designed and analyzed a circular open volumetric air receiver using computational fluid dynamics to address flow instability at high temperatures. 2) A 4 kWth solar air tower simulator facility was built to experimentally evaluate the receiver. Testing showed the receiver could achieve air temperatures over 350°C with over 90% efficiency. 3) Issues like non-uniform heating and dust deposition were identified that need further work, such as an air recirculation system and cleaning strategy, but initial results indicate potential for process heat applications.