— We therefore present a detailed analysis of two-stage line-focus asymmetric concentrators for flat receiver geometries and compare them to their symmetric counterparts.

This study proposes a method to facilitate an integrative design of urban typologies and roof-integrated two-stage solar concentrators (TSSCs) as energy supply solutions in 14 locations.

 — Here we propose a novel 2-stage dish concentrator system for concentrating solar power plants based on the so-called overlap method, which improves both the radial flux concentration ratio (β) and the intercept factor (γ) of the concentrator.

 — As a leaf vein carries water and nutrients, a luminescent fiber placed between two luminescent plates transports optical power to a photovoltaic (PV) cell. An incident photon goes through two-stage photoconversion.

The model uses a Monte Carlo ray-trace procedure to determine the focal plane distribution as a function of optical parameters and, by evaluating the trade-off between thermal losses and optical gain, calculates the corresponding optimized concentration and thermal efficiency as a function of temperature, both with and without the secondary.

 — Among several advanced technologies, two-stage solar concentrators (TSSCs) (employing two mirrors to focus sunlight on a receiver) have significant potential to address energy applications in buildings such as heat and/or electrical power supply [4, 5].

This paper is devoted to an analysis and comparison of concentrator-receiver system efficiency for one- and two-stage solar concentrators. A new computer code TANDEM for calculating the concentrator-receiver system efficiency was developed.

 — We present a new two-stage optical design for parabolic dish concentrators that can realistically attain close to 90% of the thermodynamic limit to concentration with practical, compact designs (e.g., at parabola rim half-angles of around 45 [degrees]).

Two-stage photovoltaic concentrators with Fresnel lenses as primaries and dielectric totally internally reflecting nonimaging concentrators as secondaries are discussed. The general design principles of such two-stage systems are given.

 — An orbital transfer payload strongly depends on solar concentrator mass which is determined by its efficiency. This paper is devoted to analysis and comparison of concentrator-receiver system efficiency for one- and two-stage solar concentrators.