Design and evaluation of building-integrated photobioreactor facades for reducing carbon emissions and energy consumption
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ID: 286939
2023
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Abstract
In response to the need to reduce carbon emissions in the Philippines, microalgae photobioreactor facades are identified as an area with potential for tackling these issues. The technology can cultivate algae which can be processed into biofuels, utilize wastewater, and provide shading to reduce building heat loads. This study presents a design for a system of PBRs installed on the facade of a hypothetical Metro Manila office building, which utilizes wastewater and outdoor air supplemented with CO2 to cultivate Chlorella vulgaris in tandem with regular building operations. A theoretical evaluation of the system was conducted, using mass balance calculations to determine the inputs and outputs required by the system, and heat transfer calculations to estimate the reduction in air conditioning energy consumption provided by the shading effect of the PBR facade. Life cycle assessment of the continuous operation of the system was conducted to evaluate the environmental performance of the system with regards to climate change and eutrophication potential. The proposed system can produce 0.837 kg/day of algae biomass, with a net consumption of CO2 by algae of 1.574 kg/day and a total net reduction in building CO2 emissions by 24.385 kg/day when factoring in energy savings due to PBR shading. Further research is required to optimize PBR temperatures for algae growth and verify the performance of algae, the system thermal behavior and the wastewater composition in Metro Manila.
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| Authors | Sioson, Jose Antonio Sy-Quia |
| Journal | Malay Journal |
| Year | 2023 |
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