Comparative life-cycle assessment of a novel osmotic heat engine and an organic Rankine cycle for energy production from low-grade heat
| Autor: | Johan Vanneste, Michael B. Heeley, Tzahi Y. Cath, Kerri L. Hickenbottom, Junko Munakata Marr, Leslie Miller-Robbie |
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| Rok vydání: | 2018 |
| Předmět: |
Organic Rankine cycle
Waste management Renewable Energy Sustainability and the Environment business.industry 020209 energy Strategy and Management Pressure-retarded osmosis 02 engineering and technology Membrane distillation Industrial and Manufacturing Engineering Renewable energy 0202 electrical engineering electronic engineering information engineering Working fluid Environmental science business Life-cycle assessment General Environmental Science Efficient energy use Heat engine |
| Zdroj: | Journal of Cleaner Production. 191:490-501 |
| ISSN: | 0959-6526 |
| Popis: | A comparative life-cycle assessment (LCA) was performed to evaluate the environmental impacts of an osmotic heat engine (OHE) and an organic Rankine cycle (ORC) for electrical energy generation from low-grade heat. The OHE is a novel membrane-based process that couples pressure retarded osmosis (an energy generating process) and membrane distillation (a working fluid regeneration process), whereas the ORC is an established power cycle. The LCA considered the material use for system construction and operation, and found that the environmental impacts for both the construction and operation stages of the OHE were higher than the ORC. The sensitivity analysis concluded that OHE environmental impacts could be reduced by 80% with future improvements to PRO membranes and membrane module performance. Additionally, with further improvements the OHE could be a viable energy production process that can increase energy efficiency and reduce CO2 emissions from coal and natural gas power plants by 20.5 and 11.9 million kg of CO2 per year, respectively. |
| Databáze: | OpenAIRE |
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