SIMULATION OF LED LIGHT INTENSITY ATTENUATIONS IN THE BUBBLE CURTAIN ENCLOSURE

Rong-Yuan Jou, Cheng-Wei Du

Abstract

To measure the light intensity profiles of LEDs light sources in different media (air, water, and air bubble curtains) to simulate the cultivate environments of hydrogen production, three colors of LEDs lights, red (620.084nm), white (464.979nm), and blue (458.317nm), respectively, are used to simulate light intensity in the space of a rectangular glass enclosure where photosynthetic bacteria is supposed to be cultured inside. The illuminations inside the enclosure are measured by an optical fiber which is connected to the AvaSpec-2048 spectrometer. Photon fluxes are measured by LI-COR-190SA with LI-1400 data logger. From experimental measurements, the minimum illuminances in the enclosure with three different media, respectively, it is found that in the water medium case, its value is the largest and in the air medium case, its value is the lowest. Whatever volumetric air rates in air-bubbled media, the minimum illuminances are between the values in the air medium cases and in water medium cases.

Keywords

air bubble, enclosure, illumination, LED light

Download

IMEKO-WC-2015-TC20-377.pdf

DOI

-

IMEKO TC

TC20 - Measurements of Energy and Related Quantities

Back to the proceedings