NOVELTY - The system comprises a renewable energy production installation including photobioreactor arrays (102) for using a carbon dioxide (151) from a fossil energy production system to produce algae from solar radiation and from complementary artificial illumination when solar energy is unavailable or inadequate. The photobioreactor arrays form an enclosed environment in which the carbon dioxide from the fossil energy production installation, water, and algae circulates while exposed to solar radiation within the photobioreactor arrays.    USE - The system is useful for establishing synergism between a renewable-energy production installation and a fossil-energy production installation (claimed) for the production of marketable energy forms such as electricity, methanol, petroleum-equivalent transportation fuels, urea fertilizer and industrial hydrogen and for algae cultivation.    ADVANTAGE - The system reduces the consumption of fossil energy in energy production, maximizes the use of solar energy, and minimizes emissions of carbon dioxide to the atmosphere.    DETAILED DESCRIPTION - The system comprises a renewable energy production installation including photobioreactor arrays (102) for using a carbon dioxide (151) from a fossil energy production system to produce algae from solar radiation and from complementary artificial illumination when solar energy is unavailable or inadequate. The photobioreactor arrays form an enclosed environment in which the carbon dioxide from the fossil energy production system, water, and algae circulates while exposed to solar radiation within the photobioreactor arrays. The photobioreactor arrays have tubes complete with internal light emitting elements to create artificial illumination for continuous algae cultivation. The renewable energy production installation further includes: an algae/liquid separation device to separate effluent from the photobioreactor arrays to algae biomass and recycled liquid; an algae oil extractor to receive the algae biomass and recover an oil-content of the algae; a liquid recycle device to recover an oxygen from the recycled liquid produced in the algae/liquid separation device; a piping for delivering the oil-content of the algae and the oxygen from the recycled liquid to the fossil energy production system and electrical connections to provide the electricity required for the artificial illumination. One of the tubes is provided with an inner tube to decrease an actual cross section through which the carbon dioxide, water, and algae circulate. The light emitting elements within the photobioreactor arrays are arranged within the inner tube of the photobioreactor tube to provide enhanced dissemination of light photons throughout the cross section of the tube. The inner tube is a concentrically placed circular tube in relation to an outer tube of the photobioreactor arrays. The light emitting elements are fluorescent or neon type lights and LEDs arranged in supported arrays oriented to a circumference of the inner tube. The light emitting elements are selected to emphasize emissions of light frequencies at both ends of the visible spectrum. The fossil energy production system is an oxyfuel combustion system and an oxygen enhanced combustion system.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a system for the cultivation of algae and for processing the algae for the production of its oil and by-product oxygen, and for the processing of oil-free algae for the production of methane.    Photobioreactor arrays (102)    By-product oxygen stream through line (104)    Algae/liquid separation device (128)    Algae-oil extraction device (138)    Carbon dioxide. (151)