Potential of brown algae for sustainable electricity production through anaerobic digestion
| Autor: | Christopher M. Saffron, J. Jay Liu, Peyman Fasahati, Hee Chul Woo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
020209 energy Energy Engineering and Power Technology 02 engineering and technology 010501 environmental sciences 01 natural sciences Methane chemistry.chemical_compound 0202 electrical engineering electronic engineering information engineering Production (economics) 0105 earth and related environmental sciences Energy demand biology Renewable Energy Sustainability and the Environment business.industry Environmental engineering Internal rate of return biology.organism_classification Brown algae Anaerobic digestion Fuel Technology Electricity generation Nuclear Energy and Engineering chemistry Electricity business |
| Zdroj: | Energy Conversion and Management. 135:297-307 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2016.12.084 |
| Popis: | This paper assesses the economics of heat and power production from the anaerobic digestion (AD) of brown algae (Laminaria japonica) at a plant scale of 400,000 dry tons/year. The conversion process was simulated in Aspen Plus v.8.6 to obtain rigorous heat and material balance for energy assessments and the development of a techno-economic model. The breakeven electricity selling price (BESP) was found to be 18.81 ¢/kWh assuming 30 years of plant life and a 10% internal rate of return. The results show that the AD unit has the highest energy demand in the entire process and consumes approximately 14% of all electricity produced. In addition, the seaweed cost of 11.95 ¢/kWh is the largest cost component that contributes to the calculated BESP, which means that a reduction in the cost of seaweed cultivation can significantly decrease the electricity production cost. A sensitivity analysis was performed on the economic and process parameters in order to assess the impact of possible variations and uncertainties in these parameters. Results showed that solids loading, anaerobic digestion yield, and time, respectively, have the highest impact on BESP. |
| Databáze: | OpenAIRE |
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