... is significantly better than what was obtained with the sunshape camera previously used by DLR. In addition, the spectral dependence of CSR was investigated and can now be determined. By combining spectral sunshapes and measurements of the optical properties of scatterers (cloud and aerosol particles), a deeper...

... in North Africa or the Middle East. Most of these problems appear linked to inadequate aerosol optical depth data used by the models, and to the dust storms from the Sahara that regularly, and strongly, modify the aerosol regime. A method that can potentially correct these problems, or allow for model...

... the heterogeneous oxidation of zinc vapor. The conversion of zinc in polydisperse aerosol reactors has been limited to 20% for reaction times on the order of a minute, resulting in a cycle efficiency of ∼ 6 % . The benefit of completely converting zinc via the heterogeneous oxidation of zinc vapor is an increase...

...Christopher Perkins; Alan Weimer Computational fluid dynamics simulations were performed to model solar ZnO dissociation in a tubular aerosol reactor at ultrahigh temperatures ( 1900 – 2300 K ) . Reactor aspect ratios ranged between 0.15 and 0.45, with the smallest ratio base case corresponding...

... inlet temperature is increased over the hydrogen base case A solar-thermal fluid-wall aerosol flow reactor is used to dissociate methane to carbon black and hydrogen. The solar reactor is modeled by decoupling two domains. For the “outer domain,” both argon and hydrogen are fed...

... is severely compromised. Another issue is that many elevated concentrations occur as short-term bursts. Periodic air sampling may miss these bursts and thus not correlate well with patient exposure. An alternative is to use a continuous particle counter for the measurement of total aerosol concentrations...