Elliptic paraboloid-based solar spectrum splitters for self-powered photobioreactors

Selectively Harvesting Nonvisible Photons in Hybrid Solar Lighting Systems for Power Generation in Buildings

“…The methods used to calculate emission losses as a function of the volume occupied by the luminescent dyes are reported in previous work. [ 8 ] In short, locations in close proximity to the focal point in the SSS (where dyes could potentially be located) are ranked in increasing order of the amount of light lost when emitted from a luminescent dye located at that point. The dye molecules or quantum dots are assumed to be situated at the locations that exhibit the lowest emission losses.…”

“…Furthermore, there is significant growth potential for HSL systems in applications such as photocatalytic reactors, chemical reactors, and photobioreactors, especially to improve algae productivity for biofuel production and the food industry. [8] However, FOL systems face a number of technical challenges, including high manufacturing costs, low acceptance angle inherent to fiber optic waveguides, spectral loss mechanisms due to the incomplete use of the solar irradiance and light pipe absorption losses, and the accompanying heat generation throughout the waveguide. Significant research efforts have been put forth to address these technical challenges.…”

“…Furthermore, there is significant growth potential for HSL systems in applications such as photocatalytic reactors, chemical reactors, and photobioreactors, especially to improve algae productivity for biofuel production and the food industry. [ 8 ]…”

Elliptic Array Luminescent Solar Concentrators for Combined Power Generation and Microalgae Growth

“…Figure 10a,b show the percentage of radiation emitted from the focal line that is lost through the upper and bottom entrance and exit ports as a function of the in-plane (X-Z plane shown in Figure 2b) and out-of-plane (Y-Z plane shown in Figure 3b) displacement of the luminescent dye from the focal line for two sample EASSS configurations with c = 5 cm and h = 2 and h = 4 cm, respectively. As an example, based on the assumptions and analysis regarding dye concentration and absorption that we reported in a previous work [49], it was concluded that the required volume of Lumogen R305 dye in the EASSS with parameter values of c/a = 0.91, c = 1.25 cm and O = 0.1 cm and an area of 10 × 10 cm 2 to absorb all the incident light over the spectral range of 575~620 nm, requires ~1.57 × 10 −3 mm 3 for each unit cell. This required volume creates negligible focal line-offset losses (less than ~1%).…”

“…This required volume creates negligible focal line-offset losses (less than ~1%). As an example, based on the assumptions and analysis regarding dye concentration and absorption that we reported in a previous work [49], it was concluded that the required volume of Lumogen R305 dye in the EASSS with parameter values of c/a = 0.91, c = 1.25 cm and O = 0.1 cm and an area of 10 × 10 cm 2 to absorb all the incident light over the spectral range of 575~620 nm, requires~1.57 × 10 −3 mm 3 for each unit cell. This required volume creates negligible focal line-offset losses (less than~1%).…”