Energy efficiency analysis of membrane distillation for thermally regenerative salinity gradient power technologies
نویسندگان
چکیده
The abundant resource of low-temperature heat sources (≈80–120 °C), e.g., low-concentration solar collectors or shallow geothermal wells, hold huge potential to be a renewable energy supply. A proposed method for harnessing such low-grade is use the distill solution and then utilize produced concentration difference generate work, by means salinity gradient power (SGP) technologies. In this application, efficiency distillation process (ratio between mixing free consumed heat) becomes fundamental performance parameter. This study systematically analyzes direct contact membrane (DCMD). technique often billed as an emergent innovation that can thermal additionally has advantages compactness relatively simple implementation. However, we show DCMD always lower efficiencies than traditional vacuum achieve same separation. particular, smaller at high concentrations, which desired distillation–SGP approach conversion. main source entropy production in unavoidable conduction across membrane. Alternatively, could better candidate regenerate utilization with distillation–SGP.
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ژورنال
عنوان ژورنال: Desalination
سال: 2022
ISSN: ['1873-4464', '0011-9164']
DOI: https://doi.org/10.1016/j.desal.2022.115694