The effect of the cooling nozzle arrangement to the thermal performance of a solar impinging receiver

A New High-Temperature Durable Absorber Material Solution through a Spinel-Type High Solar Absorptivity Coating on Ti2AlC MAX Phase Material

“…However, considering that modern high-temperature receivers/reactors are usually designed with very high concentration optical concentrators and cavity-shaped absorbers, the influence of the thermal emissivity of the absorber material to the receiver/reactor efficiency is relatively low, compared to the solar absorptivity. , Therefore, the absorptivity data in this wavelength range is more useful for the internal radiation heat-transfer design as the radiative heat transfer is non-negligible when the temperature exceeds 500 °C, and the high thermal emissivity surface can enhance the heat transfer on the heat sink side . For pressurized indirectly irradiated air receivers, − the HiE coating can be applied only on the outer surface of the absorber, leaving the inner surface directly exposed to the hot gas as the oxidized surface can offer higher thermal emissivity.…”

Solar selective reflector materials: Another option for enhancing the efficiency of the high-temperature solar receivers/reactors

“…1. For a direct absorption receiver, the concentrated solar irradiation is absorbed directly by the absorber like in radial type impinging receivers [12]. In direct absorption cavity receivers, the absorbers are the most critical components that usually need to sustain high light fluxes, high temperatures and high pressures over a long period.…”